From hbr@mailman.qth.net  Mon Jan 12 05:02:05 2004
From: hbr@mailman.qth.net (Byron Tatum)
Date: Sun, 11 Jan 2004 23:02:05 -0600
Subject: [HBR] G4DAF Receiver
Message-ID: <007201c3d8c9$39f799a0$4ee9dacf@your6jnhhu0520>

Hello-
    I have a version of the G4DAF receiver that I obtained in a trade in =
the Houston, TX. area. I am really fascinated by the "Electronique" RF =
tuner and IF transformers.Plus, it has the good Eddystone 898 dial =
drive. However, I am so bogged down in other projects and my work that I =
hate to just let this thing lay around for a long time. Worse yet, I may =
be tempted to borrow parts off of it.
    There is a nice manual that is a compilation of receiver articles =
and some component data, all pertaing to this design. I would like to =
see the receiver go into the hands of someone who will give it the TLC =
it deserves.The unit is in nice shape but is not ready for actual use, I =
did notice several component leads disconnected.
    With that said, I would be interested in a trade or sale of the =
receiver. I am near Houston, TX and prefer a local deal, but unit could =
be shipped if absolutely necessary.
                Thanks all, Byron WA5THJ.

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Wed Jan 14 18:01:05 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Wed, 14 Jan 2004 13:01:05 -0500 (EST)
Subject: [HBR] Homebrew Receiver using National parts.
Message-ID: <Pine.LNX.4.33.0401141259260.11109-100000@localhost.localdomain>

Don't recall if I've shown you guys this one before. Aploologies if it's a
re-run...
http://www.edebris.com/catalog2/item/1082



From hbr@mailman.qth.net  Wed Jan 14 18:14:57 2004
From: hbr@mailman.qth.net (Tom Smith)
Date: Wed, 14 Jan 2004 12:14:57 -0600
Subject: [HBR] Homebrew Receiver using National parts.
In-Reply-To: <Pine.LNX.4.33.0401141259260.11109-100000@localhost.localdomain>
Message-ID: <web-79968569@mail.hal-pc.org>

Bob,

What a gorgeous receiver. It's worth seeing a second time even if it's 
been around before.

Thanks,
Tom  N5AMA

On Wed, 14 Jan 2004 13:01:05 -0500 (EST)
  <bob@atl.org> wrote:
>Don't recall if I've shown you guys this one before. Aploologies if 
>it's a
>re-run...
>http://www.edebris.com/catalog2/item/1082
>
>
>************************************
>Visit the HBR Receiver Web Site with over 100 pictures of receivers 
>and 
>construction notes...... via http://www.qsl.net/k5bcq/ 
>
>Retrieve reflector archived data via 
>http://mailman.qth.net/mailman/listinfo/hbr
>


From hbr@mailman.qth.net  Wed Jan 14 18:52:11 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Wed, 14 Jan 2004 13:52:11 -0500
Subject: [HBR] Homebrew Receiver using National parts.
Message-ID: <7A9E328D.1400112A.00002CAA@aol.com>

In a message dated 1/14/2004 1:01:05 PM Eastern Standard Time, bob@atl.org writes:

> Don't recall if I've shown you guys this one before. 
> Aploologies if it's a
> re-run...
> http://www.edebris.com/catalog2/item/1082

Fascinating!

Looks to me like somebody had an FB-7 or -XA, and wanted a PW style dial. So they got a new cabinet
and chassis and rebuilt the FB into it, with the 
NPW drive unit and a few newer tubes.

Quite ingenious.

73 de Jim, N2EY

From hbr@mailman.qth.net  Wed Jan 14 19:05:07 2004
From: hbr@mailman.qth.net (Jeff Noel)
Date: Wed, 14 Jan 2004 14:05:07 -0500
Subject: [HBR] Homebrew Receiver using National parts.
References: <web-79968569@mail.hal-pc.org>
Message-ID: <000601c3dad1$53f39c00$e56e2c42@hppav>

thanks for the pictures

Jeff


From hbr@mailman.qth.net  Wed Jan 14 19:38:49 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Wed, 14 Jan 2004 14:38:49 EST
Subject: [HBR] Miller 2002 coils
Message-ID: <192.24b71788.2d36f4c9@aol.com>

Hi gang,
Anyone have a couple of these in your junkbox you would care to part with ?
Also, RS 270-1430 might work.

Kindest regards,
Dave


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Wed Jan 14 20:28:26 2004
From: hbr@mailman.qth.net (Mobile Engineering)
Date: Wed, 14 Jan 2004 14:28:26 -0600
Subject: [HBR] Miller 2002 coils
In-Reply-To: <192.24b71788.2d36f4c9@aol.com>
References: <192.24b71788.2d36f4c9@aol.com>
Message-ID: <6.0.1.1.2.20040114142749.01c12378@pop.hickorytech.net>

Hi,

Without researching just what these are, I can't tell. Do you have a 
photograph?

73's,

John, K0YQX

At 01:38 PM 1/14/2004, DAVEINBHAM@aol.com wrote:
>Hi gang,
>Anyone have a couple of these in your junkbox you would care to part with ?
>Also, RS 270-1430 might work.
>
>Kindest regards,
>Dave
>
>
>--- StripMime Report -- processed MIME parts ---
>multipart/alternative
>   text/plain (text body -- kept)
>   text/html
>The reason this message is shown is because the post was in HTML
>or had an attachment.  Attachments are not allowed.  To learn how
>to post in Plain-Text go to: http://www.expita.com/nomime.html  ---
>************************************
>Visit the HBR Receiver Web Site with over 100 pictures of receivers and
>construction notes...... via http://www.qsl.net/k5bcq/
>
>Retrieve reflector archived data via 
>http://mailman.qth.net/mailman/listinfo/hbr



From hbr@mailman.qth.net  Wed Jan 14 21:48:27 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Wed, 14 Jan 2004 16:48:27 EST
Subject: [HBR] Miller 2002 coils
Message-ID: <109.2b8f94bd.2d37132b@aol.com>

Hi John,
No, I do not have a photograph. This coil is what was reffered to in the 
'50's as
 " a vari -loopstick". 
 Invision a paper tube about 4 inches ( 100 millimeters ) long with a metal 
cap on one end and coil of wire on the outside of the paper tube. There is a 
ferrite slug with a threaded brass rod attached inside the tube. Inductance can 
be varied over a fairly wide range by screwing the slug in or out of the coil.
I need a pair of 'em to build a thermin. Yes, I could probably make something 
from scratch given enough time but I thought someone just might have a couple 
of 'em in the old junkbox.
Thanks.

Kindest regards,
Dave

> Hi,
> 
> Without researching just what these are, I can't tell. Do you have a 
> photograph?
> 
> 73's,
> 
> 



--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Thu Jan 15 04:10:28 2004
From: hbr@mailman.qth.net (Dan Ramsey)
Date: Wed, 14 Jan 2004 20:10:28 -0800
Subject: [HBR] G4DAF Receiver
References: <007201c3d8c9$39f799a0$4ee9dacf@your6jnhhu0520>
Message-ID: <BAY4-DAV1267at3MaHn0004d4ca@hotmail.com>

Hi Byron, Do you still have the RX--73--DAN--W7dr
  ----- Original Message -----=20
  From: Byron Tatum<mailto:bjtatum@ev1.net>=20
  To: hbr@mailman.qth.net<mailto:hbr@mailman.qth.net>=20
  Sent: Sunday, January 11, 2004 9:02 PM
  Subject: [HBR] G4DAF Receiver


  Hello-
      I have a version of the G4DAF receiver that I obtained in a trade =
in the Houston, TX. area. I am really fascinated by the "Electronique" =
RF tuner and IF transformers.Plus, it has the good Eddystone 898 dial =
drive. However, I am so bogged down in other projects and my work that I =
hate to just let this thing lay around for a long time. Worse yet, I may =
be tempted to borrow parts off of it.
      There is a nice manual that is a compilation of receiver articles =
and some component data, all pertaing to this design. I would like to =
see the receiver go into the hands of someone who will give it the TLC =
it deserves.The unit is in nice shape but is not ready for actual use, I =
did notice several component leads disconnected.
      With that said, I would be interested in a trade or sale of the =
receiver. I am near Houston, TX and prefer a local deal, but unit could =
be shipped if absolutely necessary.
                  Thanks all, Byron WA5THJ.

  --- StripMime Report -- processed MIME parts ---
  multipart/alternative
    text/plain (text body -- kept)
    text/html
  The reason this message is shown is because the post was in HTML
  or had an attachment.  Attachments are not allowed.  To learn how
  to post in Plain-Text go to: =
http://www.expita.com/nomime.html<http://www.expita.com/nomime.html>  =
---
  ************************************
  Visit the HBR Receiver Web Site with over 100 pictures of receivers =
and=20
  construction notes...... via =
http://www.qsl.net/k5bcq/<http://www.qsl.net/k5bcq/>=20

  Retrieve reflector archived data via =
http://mailman.qth.net/mailman/listinfo/hbr<http://mailman.qth.net/mailma=
n/listinfo/hbr>



--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Fri Jan 16 22:04:42 2004
From: hbr@mailman.qth.net (Byron Tatum)
Date: Fri, 16 Jan 2004 16:04:42 -0600
Subject: [HBR] G4DAF Receiver
References: <007201c3d8c9$39f799a0$4ee9dacf@your6jnhhu0520> <BAY4-DAV1267at3MaHn0004d4ca@hotmail.com>
Message-ID: <00f301c3dc7c$bf0224b0$d4d80cd8@your6jnhhu0520>

Yes, Dan-
    I still have the receiver, a local is discussing a trade { the receiver
would be a pretty good packing job}. I am not sure if anything will pan out
however. What do you have to trade? Or offer? I traded a decent GRC-9 and a
fair BC-1306 for the receiver. CUL, Byron.
----- Original Message ----- 
From: "Dan Ramsey" <sw3dan@msn.com>
To: <hbr@mailman.qth.net>
Sent: Wednesday, January 14, 2004 10:10 PM
Subject: Re: [HBR] G4DAF Receiver


Hi Byron, Do you still have the RX--73--DAN--W7dr
  ----- Original Message ----- 
  From: Byron Tatum<mailto:bjtatum@ev1.net>
  To: hbr@mailman.qth.net<mailto:hbr@mailman.qth.net>
  Sent: Sunday, January 11, 2004 9:02 PM
  Subject: [HBR] G4DAF Receiver


  Hello-
      I have a version of the G4DAF receiver that I obtained in a trade in
the Houston, TX. area. I am really fascinated by the "Electronique" RF tuner
and IF transformers.Plus, it has the good Eddystone 898 dial drive. However,
I am so bogged down in other projects and my work that I hate to just let
this thing lay around for a long time. Worse yet, I may be tempted to borrow
parts off of it.
      There is a nice manual that is a compilation of receiver articles and
some component data, all pertaing to this design. I would like to see the
receiver go into the hands of someone who will give it the TLC it
deserves.The unit is in nice shape but is not ready for actual use, I did
notice several component leads disconnected.
      With that said, I would be interested in a trade or sale of the
receiver. I am near Houston, TX and prefer a local deal, but unit could be
shipped if absolutely necessary.
                  Thanks all, Byron WA5THJ.

  --- StripMime Report -- processed MIME parts ---
  multipart/alternative
    text/plain (text body -- kept)
    text/html
  The reason this message is shown is because the post was in HTML
  or had an attachment.  Attachments are not allowed.  To learn how
  to post in Plain-Text go to:
http://www.expita.com/nomime.html<http://www.expita.com/nomime.html>  ---
  ************************************
  Visit the HBR Receiver Web Site with over 100 pictures of receivers and
  construction notes...... via
http://www.qsl.net/k5bcq/<http://www.qsl.net/k5bcq/>

  Retrieve reflector archived data via
http://mailman.qth.net/mailman/listinfo/hbr<http://mailman.qth.net/mailman/listinfo/hbr>



--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---
************************************
Visit the HBR Receiver Web Site with over 100 pictures of receivers and
construction notes...... via http://www.qsl.net/k5bcq/

Retrieve reflector archived data via
http://mailman.qth.net/mailman/listinfo/hbr





From hbr@mailman.qth.net  Sat Jan 17 02:24:48 2004
From: hbr@mailman.qth.net (Dan Ramsey)
Date: Fri, 16 Jan 2004 18:24:48 -0800
Subject: [HBR] G4DAF Receiver
References: <007201c3d8c9$39f799a0$4ee9dacf@your6jnhhu0520> <BAY4-DAV1267at3MaHn0004d4ca@hotmail.com> <00f301c3dc7c$bf0224b0$d4d80cd8@your6jnhhu0520>
Message-ID: <BAY4-DAV94gBDu9CEIe00007967@hotmail.com>

Thanks for the info Byron, let me think about it--what are you looking =
for?  Looks like you might have=20

local interest, easier than shipping. Thanks--DAN--W7dr
  ----- Original Message -----=20
  From: Byron Tatum<mailto:bjtatum@ev1.net>=20
  To: hbr@mailman.qth.net<mailto:hbr@mailman.qth.net>=20
  Sent: Friday, January 16, 2004 2:04 PM
  Subject: Re: [HBR] G4DAF Receiver


  Yes, Dan-
      I still have the receiver, a local is discussing a trade { the =
receiver
  would be a pretty good packing job}. I am not sure if anything will =
pan out
  however. What do you have to trade? Or offer? I traded a decent GRC-9 =
and a
  fair BC-1306 for the receiver. CUL, Byron.
  ----- Original Message -----=20
  From: "Dan Ramsey" <sw3dan@msn.com<mailto:sw3dan@msn.com>>
  To: <hbr@mailman.qth.net<mailto:hbr@mailman.qth.net>>
  Sent: Wednesday, January 14, 2004 10:10 PM
  Subject: Re: [HBR] G4DAF Receiver


  Hi Byron, Do you still have the RX--73--DAN--W7dr
    ----- Original Message -----=20
    From: Byron Tatum<mailto:bjtatum@ev1.net<mailto:bjtatum@ev1.net>>
    To: =
hbr@mailman.qth.net<mailto:hbr@mailman.qth.net<mailto:hbr@mailman.qth.net=
<mailto:hbr@mailman.qth.net>>
    Sent: Sunday, January 11, 2004 9:02 PM
    Subject: [HBR] G4DAF Receiver


    Hello-
        I have a version of the G4DAF receiver that I obtained in a =
trade in
  the Houston, TX. area. I am really fascinated by the "Electronique" RF =
tuner
  and IF transformers.Plus, it has the good Eddystone 898 dial drive. =
However,
  I am so bogged down in other projects and my work that I hate to just =
let
  this thing lay around for a long time. Worse yet, I may be tempted to =
borrow
  parts off of it.
        There is a nice manual that is a compilation of receiver =
articles and
  some component data, all pertaing to this design. I would like to see =
the
  receiver go into the hands of someone who will give it the TLC it
  deserves.The unit is in nice shape but is not ready for actual use, I =
did
  notice several component leads disconnected.
        With that said, I would be interested in a trade or sale of the
  receiver. I am near Houston, TX and prefer a local deal, but unit =
could be
  shipped if absolutely necessary.
                    Thanks all, Byron WA5THJ.

    --- StripMime Report -- processed MIME parts ---
    multipart/alternative
      text/plain (text body -- kept)
      text/html
    The reason this message is shown is because the post was in HTML
    or had an attachment.  Attachments are not allowed.  To learn how
    to post in Plain-Text go to:
  =
http://www.expita.com/nomime.html<http://www.expita.com/nomime.html<http:=
//www.expita.com/nomime.html<http://www.expita.com/nomime.html>>  ---
    ************************************
    Visit the HBR Receiver Web Site with over 100 pictures of receivers =
and
    construction notes...... via
  =
http://www.qsl.net/k5bcq/<http://www.qsl.net/k5bcq/<http://www.qsl.net/k5=
bcq/<http://www.qsl.net/k5bcq/>>

    Retrieve reflector archived data via
  =
http://mailman.qth.net/mailman/listinfo/hbr<http://mailman.qth.net/mailma=
n/listinfo/hbr<http://mailman.qth.net/mailman/listinfo/hbr<http://mailman=
qth.net/mailman/listinfo/hbr>>



  --- StripMime Report -- processed MIME parts ---
  multipart/alternative
    text/plain (text body -- kept)
    text/html
  The reason this message is shown is because the post was in HTML
  or had an attachment.  Attachments are not allowed.  To learn how
  to post in Plain-Text go to: =
http://www.expita.com/nomime.html<http://www.expita.com/nomime.html>  =
---
  ************************************
  Visit the HBR Receiver Web Site with over 100 pictures of receivers =
and
  construction notes...... via =
http://www.qsl.net/k5bcq/<http://www.qsl.net/k5bcq/>

  Retrieve reflector archived data via
  =
http://mailman.qth.net/mailman/listinfo/hbr<http://mailman.qth.net/mailma=
n/listinfo/hbr>




  ************************************
  Visit the HBR Receiver Web Site with over 100 pictures of receivers =
and=20
  construction notes...... via =
http://www.qsl.net/k5bcq/<http://www.qsl.net/k5bcq/>=20

  Retrieve reflector archived data via =
http://mailman.qth.net/mailman/listinfo/hbr<http://mailman.qth.net/mailma=
n/listinfo/hbr>



--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Sun Jan 18 00:14:08 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Sat, 17 Jan 2004 19:14:08 EST
Subject: [HBR] troubleshooting an HBR 16-help appreciated
Message-ID: <bd.3b6b8ded.2d3b29d0@aol.com>

Hi Gang-I finally bought a pretty nice one some months back but non working. 
Audio is working, power supply good. 1710 kc osc good, 3.5 mhz marker good 
etc. I only have 1 set of 40 meter coils that seem to have been built right. Im 
not getting any output on the 
vfo/ 1st oscillator. I checked and rechecked 1st osc wiring and components- 
seems correct. Any suggestions? Oh and I assume  1st osc should be about at 8.7 
mhz out on 40? Correct me if Im wrong. Any other suggestions most 
appreciated. I do have a signal gen, vtvm, and a scope. Thanks again!!! 73s Lew K1NDV  
direct e mail is fine too. 


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Sun Jan 18 01:46:23 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Sat, 17 Jan 2004 20:46:23 -0500
Subject: [HBR] troubleshooting an HBR 16-help appreciated
In-Reply-To: <bd.3b6b8ded.2d3b29d0@aol.com>
Message-ID: <40099F1F.21515.398D7F3@localhost>

Lew asked:

> Any other suggestions most appreciated. I do have a signal gen, vtvm,
> and a scope. 

Oh boy -- I love these pop quizzes!   

Have you looked at the set in a darkened room to see that all the 
tubes light?   Filament wiring problems, maybe even a dead fil., are 
possible.

The local osc should tune 5400-5700 on 40, i.e., *below* the 40 
meter band.

Check to be sure that you really have a 6BH6 in that socket -- 
fleamarket finds often have scrambled or 'equivalent' tubes.  Next 
check the connections on the tube socket -- swapping wires is easy 
to do. Substitute another 6BH6 for the HF oscillator.   Since the 
marker osc. works, you could use that one.   Internal grid-cathode 
shorts (can be pretty high resistance) are fairly common.

Then measure the voltages.  Here are the answers for the Deluxe 
HBR in Bill Orr's handbook, which has exactly the same osc. circuit 
and uses the same tube -- pins 1-7, in order.  These are per VTVM.

-4.1, 0, 6.3 VAC, 0, +50, +88, 0

If the -4.1 is there (anything upwards of -1.5 is probably okay) then 
the stage is oscillating and may just be way off frequency; you can 
get a rough idea with the scope (couple as loosely as you can and 
still count the cycles on the screen) and then perhaps find it with a 
general coverage receiver.  

What to do next, depends on what you know.  If you know the set 
has ever worked on 40, then you can skip checking winding of the 
coil.  If you don't know (fleamarket 'find') the check that the coil is 
wound correctly, in particular that if you start at the end that goes to 
the screen and follow the wire, you get to the screen supply and then 
the other winding continues *in the same winding direction* with the 
connection to ground.  It should be wound just as if the nearest two 
coil connections were a tap, except they're separated for DC 
purposes.  Reversing one winding (or the connections to one winding) 
is a common fault when building oscillators.  Make each coil 
connection goes to the right pin.  Check the soldering to each pin -- 
all should have continuity to at least one other pin and will read ~0 on 
a VTVM.  Go into the set and check the coil connections there.   

If you can borrow a GDO, then 'dip' the coil.   It should be somewhere 
in the osc. tuning range, should tune as you tune the receiver, and 
should have a pretty sharp dip.   Try the test out of the receiver too -- 
the dip should be significantly higher frequency.   Shorted turns or 
crummy caps will often show up at this stage.   

If no GDO or you don't like the answer, count the turns on each 
winding; I don't have the #s for the HBR 16 but the 40 meter coil for 
the 'deluxe HBR' in Bill Orr's handbook has 6-1/2 turns on the control 
grid winding and 10-7/8 turns on the screen winding; those should be 
approximately right.   Check spacing -- Deluxe HBR is 3/32"

Inspect for shorts between plates or in wiring to the three variable 
caps/trimmers in the oscillator circuit.   

If all of that checked out, then you're down to parts faults.   Retrace 
the wiring before getting too deeply into it, particularly check how 
everything connects to the coil and within.   When you've done this, 
then get someone else to do it for you -- you may be overlooking a 
mistake.   Disconnect C7 (coupling cap to the mixer -- that 
eliminates it as a fault.   Replace the .001 screen bypass cap.   
Replace the 100 mmf grid coupling cap.  

By now it should be working.   Good luck with your project!

Walt Hutchens
KJ4KV



From hbr@mailman.qth.net  Sun Jan 18 01:51:37 2004
From: hbr@mailman.qth.net (Darrell, WA5VGO)
Date: Sat, 17 Jan 2004 19:51:37 -0600
Subject: [HBR] troubleshooting an HBR 16-help appreciated
In-Reply-To: <bd.3b6b8ded.2d3b29d0@aol.com>
Message-ID: <5.2.0.9.2.20040117194137.00b1f070@mail.earthlink.net>

Normally the oscillator operates on the low side on every band but 80 
meters. That doesn't mean it won't work operating on the high side, but 
it's not how Ted intended for it to be. Make sure the plates of the air 
padder across the coil aren't shorted. I've seen them where the rotor 
somehow slips out of place and forces itself against the stator plates.

Good Luck,

Darrell, WA5VGO


At 07:14 PM 1/17/2004 -0500, LJL160@aol.com wrote:
>Hi Gang-I finally bought a pretty nice one some months back but non working.
>Audio is working, power supply good. 1710 kc osc good, 3.5 mhz marker good
>etc. I only have 1 set of 40 meter coils that seem to have been built 
>right. Im
>not getting any output on the
>vfo/ 1st oscillator. I checked and rechecked 1st osc wiring and components-
>seems correct. Any suggestions? Oh and I assume  1st osc should be about 
>at 8.7
>mhz out on 40? Correct me if Im wrong. Any other suggestions most
>appreciated. I do have a signal gen, vtvm, and a scope. Thanks again!!! 
>73s Lew K1NDV
>direct e mail is fine too.




From hbr@mailman.qth.net  Sun Jan 18 04:16:47 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Sat, 17 Jan 2004 23:16:47 -0500
Subject: [HBR] troubleshooting an HBR 16-help appreciated
In-Reply-To: <5.2.0.9.2.20040117194137.00b1f070@mail.earthlink.net>
References: <bd.3b6b8ded.2d3b29d0@aol.com>
Message-ID: <4009C25F.23469.4228EDE@localhost>

Darrell wrote:

> Make sure the plates of the air padder across the coil aren't
> shorted. I've seen them where the rotor somehow slips out of place
> and forces itself against the stator plates. 

I've seen that too.   One flavor is the bushing (usually hex shape) on 
the end of the rotor shaft is loose so the contact spring pushes the 
shaft and rotor down and the plates short.  Another is the crimped-in 
bushings in which the stator is mounted (usually soldered) on the 
end plate are not crimped firmly so the stator flops around causing at 
least serious instability and possibly a short.

Ted's approach with putting the oscillator below the band on all 
bands above 80 gives significantly better stability than going to the 
high side.   You do have to flip sidebands when switching from 80 to 
the higher bands.

Walt
KJ4KV



From hbr@mailman.qth.net  Sat Jan 24 15:03:12 2004
From: hbr@mailman.qth.net (Bill Higgs)
Date: Sat, 24 Jan 2004 10:03:12 -0500
Subject: [HBR] I'v finally started the HBR-16
Message-ID: <0ea101c3e28b$2f971d70$6500a8c0@BILLDESKTOP>

Hello fellow listers,

Now that the holidays are behind us, I have finally got a start on the =
HBR. Currently, all that is done is basic metalwork and planning, but I =
expect to drill more holes over the weekend and maybe even mount the =
tuning mechanism and some tube sockets.

Rather than try the typical prefab chassis, panel, and cabinet, I built =
my own foundation from bits and pieces. The chassis itself is the top =
cover from a digital thingy I picked up at a hamfest for $1, and the =
front and rear panels are made from two pieces of aluminum I got at a =
yard sale last summer for 50 cents each (pebble grain, even). So far, =
cost is up to $2. To hold it all together, I spent $3.50 for some angle =
aluminum and another $2 for some flathead #6 screws to fasten it with. =
Total cost to date is $7.50, not counting a new hacksaw blade. The =
bottom plate and the top and sides of the enclosure will be cut from an =
old broadcast video monitor cover, which is already perforated for =
ventilation. Pix of this effort can be found at =
www.lizcurtishiggs.com/images/special/side.jpg and =
www.lizcurtishiggs.com/images/special/underside.jpg. Still just an empty =
enclosure, and pix a bit fuzzy - sorry!

I don't know the exact gauge of the material, but it is thick enough to =
handle countersunk #6 screws, so I would guess that it is a bit heaver =
than average chassis material for this size unit. I will add a couple of =
braces, at least near the tuning mechanism.

Plans are to follow the HBR-16 architecture, but with a couple of tube =
changes. I'm going to try a 6eh7 as both RF amp and IF amps, a 6EJ7 as =
first mixer, and the 6U8A circuit from the HBR-13 as second mixer. =
Second IF is at 85kc (not Hertzes), using command set cans, possibly =
adding an extra can for additional selectivity (thanks, Walt!). The 6JH8 =
product detector from the "KCS Compactron" looks like it is worth trying =
(thanks for the schematic, Pat!).

Tuning will be with an old National 5:1 dial (yes, I know it's too slow, =
but I'm adding a small "clarifier" control in parallel. Also, rather =
than plug in coils, I'm going to try the "band imaging" concept, =
covering both 80 and 40 with a single VFO range. If I want the higher =
bands, I'll try an outboard converter . . .

Best wishes to all. I'll post some more pix as construction progresses.

Bill, NT4C 

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Sat Jan 24 16:23:52 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Sat, 24 Jan 2004 11:23:52 -0500
Subject: [HBR] I'v finally started the HBR-16 -- And HBGCR Update
In-Reply-To: <0ea101c3e28b$2f971d70$6500a8c0@BILLDESKTOP>
Message-ID: <401255C8.27789.6B0B69@localhost>

Congratulations!   Sounds like a good start on a great project!

> The 6JH8 product detector from the "KCS Compactron" looks like it is
> worth trying ...

This is probably a very high gain circuit compared to most product 
detectors and I wonder if the gain you have ahead of the detector is a 
rough match for the KCS design?  From the reverse side, the original 
HBR designs had only 'fairly high' gain detectors and lots of 
preceding gain.

Maybe someone here knows more about this than I do ... that's just 
a speculation.

The HBGCR (Home Brew General Coverage Receiver) project refuses 
to get beyond square two.   Having gotten the VFO assembly built 
and working, I set out to put together a synthesizer from an ARC-27 
20-30 Mcs IF chassis.   But visualizing all the interferences and 
squshing two bandswitches, some shielding, and ten crystal sockets 
into the 4-1/2" available in front of the IF chassis has prooved difficult. 
It *can* be done, but I've revisited the 'IN' side of square two several 
times and am about to go there again today, rebuilding the entire 
crystal socket and switch assembly to a slightly smaller size and 
lower relative to the chassis so it won't hit the rear of the VFO gear 
drive.

I did get the crystal oscillator hooked up and checked.  Boy, us 1958 
taxpayers bought good crystals for that radio.   They're third overtone 
units 24.7-33.7 Mcs, and most are about 150 cps high after nearly 50 
years with a variation over 100 cps in just a couple of cases.   

I'm hoping to get the rebuild of that assembly done today and then 
move on to mounting it on the main chassis.  Ugh -- about 40 holes 
to be accurately drilled in a 'U' section piece of Al.  

Biggest problem is no time.   Again the winter season is being 
devoted to playing SWAT team to the Virginia General Assembly's 
conveyer belt for passing laws.   They consider close to 2500 bills in 
60 days and in backwater areas like laws affecting pets (we breed 
and rescue dogs) there's close to no effort to consider what's good or 
bad policy -- they just count votes and heavy hitters on both sides.   
Ordinary citizens have maybe 7-10 *days* between the time a bill 
becomes public and when the decision making train leaves the 
station.   We have upwards of a dozen bills to deal with this year, 
including three new pet-related felonies and a bill that would allow 
anyone (and *require* an animal control officer) to shoot a dog 
believed to be attacking another pet.

Ugh, legislation.  I'd rather drill 40 holes accurately in a wet noodle.  I 
promise not to mention the topic again. 
  
Walt Hutchens
KJ4KV





From hbr@mailman.qth.net  Sat Jan 24 17:20:33 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Sat, 24 Jan 2004 12:20:33 EST
Subject: [HBR] I'v finally started the HBR-16
Message-ID: <179.2496bc38.2d440361@aol.com>

In a message dated 1/24/04 10:03:59 AM Eastern Standard Time, 
Bill@LizCurtisHiggs.com writes:


> Now that the holidays are behind us, I have finally got a start on the HBR. 
> Currently, all that is done is basic metalwork and planning, but I expect to 
> drill more holes over the weekend and maybe even mount the tuning mechanism 
> and some tube sockets.


Before you do, hear me out about the tuning cap.

> 
> 
> Plans are to follow the HBR-16 architecture, but with a couple of tube 
> changes. I'm going to try a 6eh7 as both RF amp and IF amps, a 6EJ7 as first 
> mixer, and the 6U8A circuit from the HBR-13 as second mixer. 

Be aware that the 6EH7 has a lot more gain than the original tubes, and may 
be a real bear to tame. Plan from the beginning to put a shield on the tube 
socket to separate grid from plate, etc. Bypasses everywhere, etc. I've used that 
bottle for years and it's not nearly as tame as a 6BA6 or 6BJ6!


Second IF is at 85kc (not Hertzes), using command set cans, possibly adding 
an 
> extra can for additional selectivity (thanks, Walt!). The 6JH8 product 
> detector from the "KCS Compactron" looks like it is worth trying (thanks for the 
> schematic, Pat!).

All good. In fact you might even consider double cans between each 85 kc. 
stage. 


> 
> Tuning will be with an old National 5:1 dial (yes, I know it's too slow, but 
> I'm adding a small "clarifier" control in parallel. 

In a receiver of such complexity, consider using something like a Command set 
capacitor. Built-in splitgear drive and dial, very smooth, very rugged. If 
you want a 3 gang, the one in a BC-455 is 62 pf per section. 

Also, rather than plug in coils, I'm going to try the "band imaging" concept, 

> covering both 80 and 40 with a single VFO range. If I want the higher 
> bands, I'll try an outboard converter . . .

Could also use a Command set tx cap for the VFO and a ganged 2 section for 
the input preselector.

And now for something completely different...

(Possible heresy beyond this point)

If the rx is only meant to cover 80 and 40, an RF stage isn't really needed. 
A good
mixer (6EJ7 is very quiet) and a double-tuned input circuit will do the job 
with a 1700 kc. IF. Of course you need a little more gain somewhere else, but 
with 6EH7s in the IF, getting enough gain isn't likely to be a problem. 

Good luck whatever you decide! Please keep the pictures coming.

73 de Jim, N2EY 


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Mon Jan 26 02:33:33 2004
From: hbr@mailman.qth.net (Bill Higgs)
Date: Sun, 25 Jan 2004 21:33:33 -0500
Subject: [HBR] HBR-?
Message-ID: <001201c3e3b4$cadcc3f0$6500a8c0@BILLDESKTOP>

Ok, folks . . . you win :). I spent the afternoon mounting a BC-453 =
tuning cap onto the chassis (front panel, actually), with much sweat =
making the holes line up. As I anticipate a 700Kc tuning range, I should =
be able to use one section of the cap in a relatively high C circuit. As =
I'm using a dual 150mmf (Millen?) in the preselector circuit to tune =
both 80 and 40, I'll not be using the other two sections. I realize a =
linear tuning scale with this unit may be a pipe dream, but it gives me =
about a 30:1 ratio and actually simplifies some of the mechanical work.

Thanks, Jim, for the "heads up" on the 6EH7. What are your thoughts on =
ditching the RF amp, using another 6JH8 (similar to the 7360) as a =
mixer, and keeping 6EH7s as IFs?? This would be similar to the =
Squires-Sanders circuit, although with a different conversion =
architecture. Not too far off from the G3PDM receiver of late '60s =
vintage. I'm trying to work with parts on hand, as I've set an upper =
limit of $100 for the project.

If I stay with the HBR RF/Mixer, I'll do the product detector similar to =
the mod shown in QST, but using the 6JH8 ($3) rather than the 7360 =
($50). It has a bit more gain, and I may be able to get away with =
skipping the audio preamp.

At any rate, I'm allowing for changes as I go. Even the best laid plans =
. . .


Bill, NT4C

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Mon Jan 26 13:37:43 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Mon, 26 Jan 2004 08:37:43 -0500 (EST)
Subject: [HBR] It's Alive!
Message-ID: <Pine.LNX.4.33.0401260835150.22493-100000@localhost.localdomain>

About 4-5 years back, my brother Bill phoned from the rummage sale he was
attending and asked if I'd be interested in a Hallicrafters HT-37. I said,
how much, the price seemed reasonable, and he dropped it off a week or so
later.

Some of you may recall my posting about this before as it's no ordinary
HT-37. It's an HT-37 transceiver. The power supply has been removed and a
5 band RF section installed in it's place. The IF has been totally rebuilt
using a KVG 9Mc crystal filter. No docs, but I dug around enough to see
that it's the classic bilateral IF. Portions appear to be diode switched
but will have to look a little more carefully to be sure.

This AM, around 4:30, which is a little early for dog walking, I had a
look at the 11pin power connector and wiring (replaces the original
accessory connector). Surprise! I discover it's set up for a Heath HP-23!
So, what the heck. I hooked up an HP-23 that I had been using with the old
HW-32A. Sure enough, she powered right up and I'm copying on 80 and 40!
Still have to root around for some 6146's and see how the TX looks on the
scope.

With all the relocation chores, I don't have time to get into this deeply
but could not resist playing with it a little before offering for sale.
It's done so nicely that one has to look at the front panel carfully to
tell it's not a stock Ht-37, Will put some photos up soon.

73,
-bob



From hbr@mailman.qth.net  Tue Jan 27 01:08:11 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Mon, 26 Jan 2004 20:08:11 EST
Subject: [HBR] HBR-?
Message-ID: <33.43512572.2d4713fb@aol.com>

In a message dated 1/25/04 9:34:40 PM Eastern Standard Time, 
Bill@LizCurtisHiggs.com writes:


> I spent the afternoon mounting a BC-453 tuning cap onto the chassis (front 
> panel, actually), with much sweat making the holes line up. 

Aw, heck , I forgot to tell ya the trick...

Use a piece of thick paper as a template. Cut holes for the knob and dial 
shafts, rub pencil to find the mounting holes. Goof around with it and some thin 
card stock until all the holes are right. (Cardboard is cheaper and easier to 
mess with than metal). Then tape it to the panel, center punch, and drill. No 
sweat.

As I anticipate a 700Kc tuning range, I should be able to use one section of 
the 
> cap in a relatively high C circuit. 

Or two...

As I'm using a dual 150mmf (Millen?) in the preselector circuit to tune both 
80 and 
> 40, I'll not be using the other two sections. I realize a linear tuning 
> scale with this unit may be a pipe dream, but it gives me about a 30:1 ratio and 
> actually simplifies some of the mechanical work.

One linearization trick is to put a fixed cap in series with the variable. By 
careful choice of series C, parallel C, and L, you can get pretty close. 
While the solution can be found mathematically, cut-and-try may be quicker.

Some folks also prefer a bit of nonlinearity. For example, someone who is 
primarily a CW op migh like having the low end spread out really wide, yet retain 
coverage of the 'phone band.

Question: why a 700 kc. tuning range?  


> 
> Thanks, Jim, for the "heads up" on the 6EH7. What are your thoughts on 
> ditching the RF amp, using another 6JH8 (similar to the 7360) as a mixer, and 
> keeping 6EH7s as IFs?? 


NICE! But I don't know if you really need a tube as hot as the 6EH7 at 85 kc. 
Of course you can always run it at less than full gain and have lots of 
headroom.

Do you have 6JH8s, or have to buy them? If you have to spend $$, why not try 
a Pullen mixer first? Any of the common dual triodes is worth a shot at 80/40. 
6BZ7?

This would be similar to the Squires-Sanders circuit, although with a 
different 
> conversion architecture. Not too far off from the G3PDM receiver of late 
> '60s vintage. I'm trying to work with parts on hand, as I've set an upper limit 
> of $100 for the project.
> 
> If I stay with the HBR RF/Mixer, I'll do the product detector similar to the 
> mod shown in QST, but using the 6JH8 ($3) rather than the 7360 ($50). It has 
> a bit more gain, and I may be able to get away with skipping the audio 
> preamp.

I may just try that 6JH8 in the Type 7.


> 
> At any rate, I'm allowing for changes as I go. Even the best laid plans . . 
> .
> 
> 


One more idea....

Most of the bandimaging receivers use a 1700 kc IF, which results in a bit of 
offset between bands. If you have the xtal and IFTs, however, there's no 
reason youcan't use 1750 kc. as the first IF, which puts 3500 and 7000 at the same 
place on the dial. VFO tunes 5250-5750 to cover 3500-4000 and 7000-7500.

But you gotta have an xtal at 1665....

73 de Jim, N2EY


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Tue Jan 27 03:25:00 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Mon, 26 Jan 2004 22:25:00 -0500 (EST)
Subject: [HBR] Some radio edebris for sale...
Message-ID: <Pine.LNX.4.33.0401262204320.30783-100000@localhost.localdomain>

Photo of HT-37 transceiver coming soon. Want to get some output tubes in
it so it looks more 'together' and to try it on air.

Here is some stuff that needs new homes...

GE model 260 lunch pail SWBCB receiver, portable, complete, unusual.
edebris.com/catalog2/item/1164

RFE Channelized AM/SSB transceiver, Collins PTO, Collins 455kc 2.1kc BW
filter, 7360 product detector.
edebris.com/catalog2/item/1169

Akkord Penguin 3 band portable radio with alligatorette finish. German.
edebris.com/catalog2/item/1166

40m ARC-5 TX in pretty nice shape. Only light 'hamming' evident
edebris.com/catalog2/item/1162

80m ARC-5 TX with power supply and modified with a modulator. Works but
chirpy on CW.
edebris.com/catalog2/item/1163

Nice Wilcox 10,000kc RX. Good parts or core for homebrew RX.
edebris.com/catalog2/item/1170


thanks for reading
more later
-Bob







From hbr@mailman.qth.net  Tue Jan 27 10:52:51 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Tue, 27 Jan 2004 05:52:51 -0500 (EST)
Subject: [HBR] Re: GB> Some radio edebris for sale...
In-Reply-To: <Pine.LNX.4.33.0401262204320.30783-100000@localhost.localdomain>
Message-ID: <Pine.LNX.4.33.0401270545310.30783-100000@localhost.localdomain>

Received some email concerning lack of pricing in this message...
Corrected...

On Mon, 26 Jan 2004 ah7i@atl.org wrote:

>
> Photo of HT-37 transceiver coming soon. Want to get some output tubes in
> it so it looks more 'together' and to try it on air.
>
> Here is some stuff that needs new homes...
>
> GE model 260 lunch pail SWBCB receiver, portable, complete, unusual.
> edebris.com/catalog2/item/1164
$250 includes 48 states ship
>
> RFE Channelized AM/SSB transceiver, Collins PTO, Collins 455kc 2.1kc BW
> filter, 7360 product detector.
> edebris.com/catalog2/item/1169
$100 + ship
>
> Akkord Penguin 3 band portable radio with alligatorette finish. German.
> edebris.com/catalog2/item/1166
$29 includes 48 states ship
>
> 40m ARC-5 TX in pretty nice shape. Only light 'hamming' evident
> edebris.com/catalog2/item/1162
$36 + ship
>
> 80m ARC-5 TX with power supply and modified with a modulator. Works but
> chirpy on CW.
> edebris.com/catalog2/item/1163
$50 + ship
>
> Nice Wilcox 10,000kc RX. Good parts or core for homebrew RX.
> edebris.com/catalog2/item/1170
$35 + ship
>

+ ship is for fed ex ground/home delivery actual charges only. I'll cover
packing. It's about the least expensive way I know to ship.


>
> thanks for reading
> more later
> -Bob
>
>
>
>
>
>


From hbr@mailman.qth.net  Tue Jan 27 12:45:12 2004
From: hbr@mailman.qth.net (Bill Higgs)
Date: Tue, 27 Jan 2004 07:45:12 -0500
Subject: [HBR] HBR-??
Message-ID: <000c01c3e4d3$678e5780$6500a8c0@BILLDESKTOP>

Thanks for all the suggestions and comments! The tuning cap was =
successfully mounted by first locating and drilling the two large holes =
(for the dial and the shaft). Then, I placed masking tape in the =
approximate area of the four mounting bosses, then smudged a bit of =
stamp pad ink on the bosses before pressing the assembly against the =
front panel. Voila! - all four mounting holes cleanly marked. The actual =
mounting probably took 20 minutes; the rest of the time was helping the =
XYL fix this or that, running the kids to church, etc. At any rate, a =
shaft coupler, a 1/4 inch shaft stub, and an oversize 2-inch knob, and =
the cap tunes fairly smoothly.

The reason for trying the 6JH8 is that I have some. After reading Pat =
Hawker's note in Amateur Radio Techniques about the 6JH8 as a =
replacement for the 7360, and finding some on sale at $2 each, I bought =
3 to play with. I'll allow some room around the first mixer area so if I =
want to try one later, I can.

700kc tuning range: the original idea was to stick with the 1600kc IF of =
the HBR-16, so I had obtained a 1515kc crystal for the second conversion =
oscillator (2nd IF is 85kc). With a 1600kc IF you need to tune 5050 to =
5750 to cover all of 80 and 40 in an imaging design allowing for a 50kc =
overage on each end. This offsets the bands more than the 1700kc IF of =
the classical band imaging design.

As my usual oscillator design is to calculate L/C values based on range =
desired, measured min/max on the cap - then try what "looks right" and =
diddle with it until I get what I want. I may try a series cap: as I =
have three sections to play with (plus the internal trimmers), I do have =
several options.

Next weekend: power supply. The transformer I was planning to use is =
only rated for 70ma, which may be too low, especially if I draw =
additional current in the front end. I have another transformer salvaged =
from a Motorola 2-way which will give me 275v at somewhat more current. =
Problem is, it's bigger, so I'll have to check the fit (BEFORE drilling =
holes).

73,

Bill, NT4C

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Tue Jan 27 20:35:12 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Tue, 27 Jan 2004 15:35:12 EST
Subject: [HBR] HBR-??
Message-ID: <142.2145fdaf.2d482580@aol.com>

Bill,

I remember seeing an article on using the ARC-5 tuning capacitor to get 
linear tuning of an oscillator.  I don't remember for sure, but it think it was QST 
in the 80's.  If I find it I'll let you know.  In the meantime, maybe someone 
else remembers seeing it.

I'm new to this group, but I have been thinking of building a receiver 
somewhat like you're working on.  I would duplicate one of the HBRs if I knew where 
to get the parts, but in the meantime I have LOTS of other parts around here.  
I may just build a simple rack and panel receiver for 75 meters AM 
(primarily) with a basic 455 kc IF.  There was an article by W2NJR in the April 1953 QST 
called "Design Notes on a Specialized Phone Receiver" along these lines, 
although I would leave out some of the "Specialized" stuff to begin with!

Dan K9WEK


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Tue Jan 27 22:10:34 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Tue, 27 Jan 2004 17:10:34 -0500
Subject: [HBR] HBR-??
In-Reply-To: <142.2145fdaf.2d482580@aol.com>
Message-ID: <40169B8A.6239.183C45D@localhost>

Dan said:
> I remember seeing an article on using the ARC-5 tuning capacitor to get
> linear tuning of an oscillator.  I don't remember for sure, but it think
> it was QST in the 80's.

There was such an article in Ham Radio Magazine.  It used an off-
center pulley and string drive as I recall.

Walt 
KJ5KV



From hbr@mailman.qth.net  Wed Jan 28 01:47:14 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Tue, 27 Jan 2004 20:47:14 EST
Subject: [HBR] HBR-??
Message-ID: <1ee.181cf3cd.2d486ea2@aol.com>

I finally found the article about Linear Tuning using an ARC-5 transmitter 
variable capacitor.  It is in Ham Radio magazine, June 1989, p. 40.  Its called 
"Linear Tuning With a War Surplus Capacitor" by John Pivnichny, N2DCH.  The 
article is 6 pages long and goes into a lot of theory and curve fitting.  You 
need to study it to see if you can make use of it in your case.

Regards,
Dan K9WEK


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Wed Jan 28 01:48:45 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Tue, 27 Jan 2004 20:48:45 EST
Subject: [HBR] HBR-??
Message-ID: <36.50050b90.2d486efd@aol.com>

I forgot to mention:  This article is not the one using offset pulleys and 
strings.
Dan K9WEK


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Wed Jan 28 18:54:49 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Wed, 28 Jan 2004 13:54:49 EST
Subject: [HBR] HBR-??
Message-ID: <82.4089c92.2d495f79@aol.com>

In a message dated 1/27/04 7:45:47 AM Eastern Standard Time, 
Bill@LizCurtisHiggs.com writes:


> The reason for trying the 6JH8 is that I have some.

Good reason. I've had trouble with RF feedthrough in a single-ended 7360 
mixer, which is why the Type 7 has an RF stage.

 After reading Pat Hawker's note in Amateur Radio Techniques about the 6JH8 
as 
> a replacement for the 7360, and finding some on sale at $2 each, I bought 3 
> to play with. I'll allow some room around the first mixer area so if I want 
> to try one later, I can.
> 
> 700kc tuning range: the original idea was to stick with the 1600kc IF of the 
> HBR-16, so I had obtained a 1515kc crystal for the second conversion 
> oscillator (2nd IF is 85kc). With a 1600kc IF you need to tune 5050 to 5750 to cover 
> all of 80 and 40 in an imaging design allowing for a 50kc overage on each 
> end. This offsets the bands more than the 1700kc IF of the classical band 
> imaging design.

Works. Plus it gives a bit of flexibility when you do the upper bands via 
converter - you don't need exactly the right xtal.


> 
> As my usual oscillator design is to calculate L/C values based on range 
> desired, measured min/max on the cap - then try what "looks right" and diddle 
> with it until I get what I want. I may try a series cap: as I have three 
> sections to play with (plus the internal trimmers), I do have several options.

Note that the osc trimmers in that cap are in series...


> 
> Next weekend: power supply. The transformer I was planning to use is only 
> rated for 70ma, which may be too low, especially if I draw additional current 
> in the front end. I have another transformer salvaged from a Motorola 2-way 
> which will give me 275v at somewhat more current. Problem is, it's bigger, so 
> I'll have to check the fit (BEFORE drilling holes).
> 
> 

External power supply! Move the heat and hum and weight out of the rx 
chassis.


73 de Jim, N2EY


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Thu Jan 29 21:40:33 2004
From: hbr@mailman.qth.net (hbr@mailman.qth.net)
Date: Thu, 29 Jan 2004 16:40:33 -0500 (EST)
Subject: [HBR] RFE 2-32Mc transceiver for sale
Message-ID: <Pine.LNX.4.33.0401291628190.26427-100000@localhost.localdomain>

Spouse nixes deal...

When will wimmens learn that a man at home with a radio
beats the hell out of other hobbies he might have chosen!

Ask your S.O. which statement is more appealing:

Honey, I'm off to the bar with my friends. We might play poker after
that so don't wait up.

vs

Honey, I'm going up to the attic to play with my radio. Come on up
if you're missing me.

In any case, its sans cabinet and output tube but otherwise complete.
I have most of the manual in photocopy form as well.
It uses a 7360 product detector.
Output tube is a 7027 IIRC but a 5-125 should sub with socket change.
This came in two versions. One with the odd tube and the other with
3 x 6146, so that's an option as well.

It has had a Collins PTO mounted as the beginnings of a conversion
from xtal controlled to hambands tuneable. Not a difficult project
to finish. PTO schema is included.

It also has a 455kc 2.1kc Collins mechanical filter.

A steal for completing or as a parts chassis at $100 plus ship.
It's all packed up and ready to go.
52lb 22x22x22 carton from 30114 by fed ex home delivery if you
want to check shippign charges at www.fedex.com/us

See it here:
http://edebris.com/catalog2/item/1169

The thumbnails link to detail. Note the scaling/quality option buttons.

If no takers I'll part it out...

73,
-Bob



From hbr@mailman.qth.net  Sat Jan 31 19:39:20 2004
From: hbr@mailman.qth.net (Neil)
Date: Sat, 31 Jan 2004 11:39:20 -0800
Subject: [HBR] Anyone do DRAKE repairs in the Seattle Area?
Message-ID: <000f01c3e831$ec3c6b50$6701a8c0@aade1fm38a9jgy>

I have TR-4C needs looking at.

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

From hbr@mailman.qth.net  Sat Jan 31 23:46:06 2004
From: hbr@mailman.qth.net (Bill Higgs)
Date: Sat, 31 Jan 2004 18:46:06 -0500
Subject: [HBR] HBR-??
Message-ID: <001201c3e854$64c4ecb0$6500a8c0@BILLDESKTOP>

Hey, gang . . .

The variable from the BC-453 is mounted, and I'm now scratching my head =
a little.  As it was intended to work with an receiver covering roughly =
190-550kc it was thus set up to cover 275-635kc, assuming high-side =
injection. Therefore a VERY wide range. To do so in a linear fashion, =
the plate design was far from linear; much closer to straight-line =
wavelength than straight line frequency. Although I can use it to cover =
my range of 5050-5750 in a High-C circuit, the linearity goes in the =
sewer.

Solutions:

1. Live with it.
2. See if any of the folks on the list have a BC-454 or BC-455 tuning =
cap they'd be willing to swap or sell (Anybody building up a Q-Fiver??)

The cap is in good condx; I'll even through in another matching pair of =
gears which will give it an even slower tuning rate. A few marks on the =
spline where it's had a setscrew, but should be usabl for anyone wanting =
to use the original tuning adapter.

Any takers?

If not, anyone had any experience dismantling one of these assemblies, =
using a different variable mounted within, and using the same drive =
gearing?

Bill Higgs, NT4C
bill@lizcurtishiggs.com

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---

