From n2apb at verizon.net  Sat Jun  4 23:59:41 2011
From: n2apb at verizon.net (George N2APB)
Date: Sat, 04 Jun 2011 23:59:41 -0400
Subject: [HBR] HBR-17 On Youtube
In-Reply-To: <236981079.680983.1306380595362.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
Message-ID: <CA10776D.3395A%n2apb@verizon.net>

What nice video of your newfound treasure in operation Scott!  I don?t
recall seeing other videos of the HBRs in action ... Quite a motivation for
moving onward to complete my own ?16, also with an Eddystone dial and an
(outboard) Q-multiplier.

Thanks for posting.

73, George N2APB



From: <whitebear1122 at comcast.net>
Reply-To: HBR Receiver List <hbr at mailman.qth.net>
Date: Thu, 26 May 2011 03:29:55 +0000 (UTC)
To: HBR Receiver List <hbr at mailman.qth.net>
Subject: [HBR] HBR-17 On Youtube


Out of the blue I was recently given an HBR receiver that the OT called an
HBR-17. He said it's Bill McKay's variation of the HBR-16 with the addition
of a Q-Multiplier and some other improvements. He also built it with the
rare Eddystone dial. In fact the receiver came with the Eddystone receipt as
well. Gosh those Eddystone dials are just fabulous albeit kind of a
mechanical pain in the butt to implement.

He had been looking for just the right ham to give the HBR to, one who knew
what it was and appreciated it. A mutual friend introduced us. When we met I
was sort of grilled about radios and the talk turned to the homemade radios.
Lucky for me I knew alot about the history of the HBR's and a little about
TC. The OT must have been satisfied because he decided to give it to me.

The OT's family had told him that his stuff would go into the trash when the
time came so the OT wasn't taking any chances.

It hasn't been used since 1973 and kind of looks like it too. It had been
sitting on the floor next to his operating bench all that time. I didn't
clean it all for the video so you're seeing it in all it's glory. The
receiver is coiled up for 20m in the video. I must say the Eddystone is
still smooth after all these unused years. It came with a complete set of
coils from 10m through 80m. I will mention that the coil box was marked
"Precious" and irreplaceable coils for the HBR receiver.

The youtube video is located at:
http://www.youtube.com/watch?v=kqRSI99g1x8

To power it after 38 years of being powered down, I brought it up over
several minutes in a variac. I wasn't trying to reform the capacitors, but
instead I wanted to avoid the sudden inrush currents that might occur from
just plugging it in and turning it on.

The receiver worked right off the bat and I found it to be completely
stable, very sensitive, good audio although the AGC audio was a bit low in
amplitude. I'm still learning how to use it.

So as I now own a Bill McKay HBR-17, I can hardly wait to build my own
receivers. I think I've finally nailed down the plan. I want to build an
HBR-11 first and then an HBR-13.

I'm still looking for a few of the unobtainium HBR parts. Looking for three
Miller 1709 or 1710 ( I have one so far), 100 KC IF, and two 1730 1800 kc
IF. 

73, Scott WA9WFA 


______________________________________________________________
HBR mailing list
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:HBR at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


From radioconnection at gmail.com  Sun Jun  5 14:52:39 2011
From: radioconnection at gmail.com (Peter Bertini)
Date: Sun, 5 Jun 2011 14:52:39 -0400
Subject: [HBR] HBR-17 On Youtube
In-Reply-To: <CA10776D.3395A%n2apb@verizon.net>
References: <236981079.680983.1306380595362.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
	<CA10776D.3395A%n2apb@verizon.net>
Message-ID: <BANLkTindx_cyDzzeGpecGS+v82iMA1x7RQ@mail.gmail.com>

Sweet to see the original Bill McKay HBR in operation! That
is the Holy Grail of HBR's in my opinion. A real
treasure, and a treat to see that it still exists and is being
used!  Wow, I am envious!

Pete
On 6/4/11, George N2APB <n2apb at verizon.net> wrote:
> What nice video of your newfound treasure in operation Scott!  I don?t
> recall seeing other videos of the HBRs in action ... Quite a motivation for
> moving onward to complete my own ?16, also with an Eddystone dial and an
> (outboard) Q-multiplier.
>
> Thanks for posting.
>
> 73, George N2APB
>
>
>
> From: <whitebear1122 at comcast.net>
> Reply-To: HBR Receiver List <hbr at mailman.qth.net>
> Date: Thu, 26 May 2011 03:29:55 +0000 (UTC)
> To: HBR Receiver List <hbr at mailman.qth.net>
> Subject: [HBR] HBR-17 On Youtube
>
>
> Out of the blue I was recently given an HBR receiver that the OT called an
> HBR-17. He said it's Bill McKay's variation of the HBR-16 with the addition
> of a Q-Multiplier and some other improvements. He also built it with the
> rare Eddystone dial. In fact the receiver came with the Eddystone receipt as
> well. Gosh those Eddystone dials are just fabulous albeit kind of a
> mechanical pain in the butt to implement.
>
> He had been looking for just the right ham to give the HBR to, one who knew
> what it was and appreciated it. A mutual friend introduced us. When we met I
> was sort of grilled about radios and the talk turned to the homemade radios.
> Lucky for me I knew alot about the history of the HBR's and a little about
> TC. The OT must have been satisfied because he decided to give it to me.
>
> The OT's family had told him that his stuff would go into the trash when the
> time came so the OT wasn't taking any chances.
>
> It hasn't been used since 1973 and kind of looks like it too. It had been
> sitting on the floor next to his operating bench all that time. I didn't
> clean it all for the video so you're seeing it in all it's glory. The
> receiver is coiled up for 20m in the video. I must say the Eddystone is
> still smooth after all these unused years. It came with a complete set of
> coils from 10m through 80m. I will mention that the coil box was marked
> "Precious" and irreplaceable coils for the HBR receiver.
>
> The youtube video is located at:
> http://www.youtube.com/watch?v=kqRSI99g1x8
>
> To power it after 38 years of being powered down, I brought it up over
> several minutes in a variac. I wasn't trying to reform the capacitors, but
> instead I wanted to avoid the sudden inrush currents that might occur from
> just plugging it in and turning it on.
>
> The receiver worked right off the bat and I found it to be completely
> stable, very sensitive, good audio although the AGC audio was a bit low in
> amplitude. I'm still learning how to use it.
>
> So as I now own a Bill McKay HBR-17, I can hardly wait to build my own
> receivers. I think I've finally nailed down the plan. I want to build an
> HBR-11 first and then an HBR-13.
>
> I'm still looking for a few of the unobtainium HBR parts. Looking for three
> Miller 1709 or 1710 ( I have one so far), 100 KC IF, and two 1730 1800 kc
> IF.
>
> 73, Scott WA9WFA
>
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From whitebear1122 at comcast.net  Wed Jun 15 20:32:13 2011
From: whitebear1122 at comcast.net (whitebear1122 at comcast.net)
Date: Thu, 16 Jun 2011 00:32:13 +0000 (UTC)
Subject: [HBR] HBR-11 Template??
In-Reply-To: <CA10776D.3395A%n2apb@verizon.net>
Message-ID: <197830561.1550721.1308184333030.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>




The HBR-11 QST article offers? full scale templates of the chassis and front panel.? Does anyone actually own a set of these?? I'd be happy to pay for a copy, maybe Kinko's can make a full size copy.? 



I have most of the unobtainium parts now for an HBR.? I'm pretty much set on building an HBR-8 to start out with since I've never built any radio equipment complicated like this before. ? I have a set of BC-453 85 KC IF transformers, a 100 Khz BFO coil, Eddystone 898 dial, 3 section variable capacitor.? I'm in the process of creating a parts list and ordering the caps, resistors, tube sockets, etc..?? I'm thinking of building it on a 17" wide chassis rather than attempting to shoehorn it onto a 14" chassis for my first attempt at building a receiver.? 



If you have a W6TC template, it would be a big help to this novice builder.? Thanks. 73, Scott WA9WFA

From johnmb at nc.rr.com  Wed Jun 15 20:42:15 2011
From: johnmb at nc.rr.com (john)
Date: Wed, 15 Jun 2011 20:42:15 -0400
Subject: [HBR] HBR-11 Template??
In-Reply-To: <197830561.1550721.1308184333030.JavaMail.root@sz0139a.emer
	yville.ca.mail.comcast.net>
References: <CA10776D.3395A%n2apb@verizon.net>
	<197830561.1550721.1308184333030.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
Message-ID: <6.2.1.2.2.20110615204120.039f49f0@pop-server.nc.rr.com>


I'll be REALLY interested in watching your progress Scott!

No template... but you could probably scan it and play with the zoom to get 
it full sized.

John K5MO

At 08:32 PM 6/15/2011, you wrote:
>The HBR-11 QST article offers?  full scale templates of the chassis and 
>front panel.?  Does anyone actually own a set of these??  I'd be happy to 
>pay for a copy, maybe Kinko's can make a full size copy.?  I have most of 
>the unobtainium parts now for an HBR.?  I'm pretty much set on building an 
>HBR-8 to start out with since I've never built any radio equipment 
>complicated like this before. ?  I have a set of BC-453 85 KC IF 
>transformers, a 100 Khz BFO coil, Eddystone 898 dial, 3 section variable 
>capacitor.?  I'm in the process of creating a parts list and ordering the 
>caps, resistors, tube sockets, etc..? ?  I'm thinking of building it on a 
>17" wide chassis rather than attempting to shoehorn it onto a 14" chassis 
>for my first attempt at building a receiver.?  If you have a W6TC 
>template, it would be a big help to this novice builder.?  Thanks. 73, 
>Scott WA9WFA 
>______________________________________________________________ HBR mailing 
>list Home: http://mailman.qth.net/mailman/listinfo/hbr Help: 
>http://mailman.qth.net/mmfaq.htm Post: mailto:HBR at mailman.qth.net This 
>list hosted by: http://www.qsl.net Please help support this email list: 
>http://www.qsl.net/donate.html


From smithab11 at comcast.net  Wed Jun 15 21:29:09 2011
From: smithab11 at comcast.net (B Smith)
Date: Wed, 15 Jun 2011 21:29:09 -0400
Subject: [HBR] HBR-11 Template??
In-Reply-To: <197830561.1550721.1308184333030.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
References: <197830561.1550721.1308184333030.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
Message-ID: <FE6788E1622C40899CADDEB729287DB0@Dell560>

Hi Scott
I  recommend you build the BFO circuit first. The 
BFO enclosure size may determine location of other
major components  on the chassis.  Also it gets 
you in the building and testing  mode.     :-)
(http://k4che.com/HBR/BFO%20Coil%20Page%201and%20photos/BFO%20Coil%20Page%20%201.htm)

73

breck k4che

--------------------------------------------------
From: <whitebear1122 at comcast.net>
Sent: Wednesday, June 15, 2011 8:32 PM
To: "HBR Receiver List" <hbr at mailman.qth.net>
Subject: [HBR] HBR-11 Template??

>
>
>
> The HBR-11 QST article offers  full scale 
> templates of the chassis and front panel.  Does 
> anyone actually own a set of these?  I'd be 
> happy to pay for a copy, maybe Kinko's can make 
> a full size copy.
>
>
>
> I have most of the unobtainium parts now for an 
> HBR.  I'm pretty much set on building an HBR-8 
> to start out with since I've never built any 
> radio equipment complicated like this before. 
> I have a set of BC-453 85 KC IF transformers, a 
> 100 Khz BFO coil, Eddystone 898 dial, 3 section 
> variable capacitor.  I'm in the process of 
> creating a parts list and ordering the caps, 
> resistors, tube sockets, etc..   I'm thinking of 
> building it on a 17" wide chassis rather than 
> attempting to shoehorn it onto a 14" chassis for 
> my first attempt at building a receiver.
>
>
>
> If you have a W6TC template, it would be a big 
> help to this novice builder.  Thanks. 73, Scott 
> WA9WFA
> ______________________________________________________________
> HBR mailing list
> Home: 
> http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: 
> http://www.qsl.net/donate.html 


From whitebear1122 at comcast.net  Fri Jun 17 10:24:05 2011
From: whitebear1122 at comcast.net (whitebear1122 at comcast.net)
Date: Fri, 17 Jun 2011 14:24:05 +0000 (UTC)
Subject: [HBR] HBR-11 Template??
In-Reply-To: <408346844.1612826.1308318914901.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
Message-ID: <1049384928.1614238.1308320645882.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>



That sounds like a good idea Breck.? I am at least planning on having the BFO box in hand when laying out the chassis in order to account for size and mounting method.? I have not purchased the BFO box yet so I don't know how close to the original HBR dimensions I'll get.? It would be a bugger to lay it all out assuming a bfo box size only to find out it's not available, next size down is too small, next size up bumps into the transformer :)?? Plus if I experiment with the BFO coil I could end up taking more space than planned. 



I am in parts acquisition mode.? I've just finished entering all the schematic parts into a spreadsheet (Microsoft Word actually).? Next step is to double check the schematic and my list, then start ordering parts.? 



I'm in good shape bfo wise as an ER subscriber sent me a 1711 100 kc BFO gratis, wouldn't even accept payment for postage.? He said he wasn't using it and was happy to see it go to good use.? I recently purchased?some parts including an ARC-5 BFO from a listmember.? So I've got options here.? From your fabulous HBR pages I understand the ARC-5 85 KC BFO coil is not tapped, and that's no problemo in my mind.? I am very familar with Colpitts oscillators as well as Hartley?oscillators as I am one of those crazy 1929 guys.? I've built two 1929 Hartleys and currently have a self excited Colpitts transmitter running on 80m and 40m.? So converting from Hartley to Colpitts should be?fine.? 



A listmember here sent me out of the blue a NOS 898 Eddystone dial for my project, gratis.?It's even in the original box.? What a gorgeous gorgeous dial!!? I won't mention names until I get the ok to do so.? This is one of those times that I am humbled by the generousity of others!? 



So the HBR project marches on.? I haven't been able to find the official HBR-11 template though.? I'll ask around again. 



At the moment I"m involved in a large radio sell off that's been going on since January.? I've sold off more than 50% of my boatanchor collection and have another 7-10 radios to go before I reach equilibrium.? That's been occupying pretty much all of my radio activity.? Almost done, just a few more months.? 



73, Scott WA9WFA 




----- Original Message ----- 
From: "B Smith" <smithab11 at comcast.net> 
To: "HBR Receiver List" <hbr at mailman.qth.net> 
Sent: Wednesday, June 15, 2011 8:29:09 PM 
Subject: Re: [HBR] HBR-11 Template?? 

Hi Scott 
I ?recommend you build the BFO circuit first. The 
BFO enclosure size may determine location of other 
major components ?on the chassis. ?Also it gets 
you in the building and testing ?mode. ? ? :-) 
(http://k4che.com/HBR/BFO%20Coil%20Page%201and%20photos/BFO%20Coil%20Page%20%201.htm) 

73 

breck k4che 


From ianmwilson73 at gmail.com  Fri Jun 17 10:43:10 2011
From: ianmwilson73 at gmail.com (Ian Wilson)
Date: Fri, 17 Jun 2011 07:43:10 -0700
Subject: [HBR] HBR-11 Template??
In-Reply-To: <1049384928.1614238.1308320645882.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
References: <408346844.1612826.1308318914901.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
	<1049384928.1614238.1308320645882.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
Message-ID: <BANLkTikUb-QmHCafgTrw5ZdYdkpgv8YGQw@mail.gmail.com>

If it's in its original state, the ARC-5 BFO coil is better than tapped: it
has two windings!
There are also (if I recall correctly) two fixed and one trimmer capacitor
in the can. So
you can build a Hartley if you wish.

If have built 85kHz BFO oscillators using an RFC (5mH?) in a Clapp-type
configuration.
That worked out very well in terms of tuning range with a 100pF variable
capacitor.

Most solutions will work fine at this frequency, stability is unlikely to be
an issue.

73, ian K3IMW

From smithab11 at comcast.net  Fri Jun 17 11:52:25 2011
From: smithab11 at comcast.net (B Smith)
Date: Fri, 17 Jun 2011 11:52:25 -0400
Subject: [HBR] HBR-11 Template??
In-Reply-To: <BANLkTikUb-QmHCafgTrw5ZdYdkpgv8YGQw@mail.gmail.com>
References: <408346844.1612826.1308318914901.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net><1049384928.1614238.1308320645882.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
	<BANLkTikUb-QmHCafgTrw5ZdYdkpgv8YGQw@mail.gmail.com>
Message-ID: <0487886E7C0846338EBE3FCBBBE71D89@Dell560>

I have never been able to successfully use the 
Command Set BFO coil in a Hartley
configuration. We would be interested in your 
results and a diagram?
Breck k4che


--------------------------------------------------
From: "Ian Wilson" <ianmwilson73 at gmail.com>
Sent: Friday, June 17, 2011 10:43 AM
To: "HBR Receiver List" <hbr at mailman.qth.net>
Subject: Re: [HBR] HBR-11 Template??

> If it's in its original state, the ARC-5 BFO 
> coil is better than tapped: it
> has two windings!
> There are also (if I recall correctly) two fixed 
> and one trimmer capacitor
> in the can. So
> you can build a Hartley if you wish.
>
> If have built 85kHz BFO oscillators using an RFC 
> (5mH?) in a Clapp-type
> configuration.
> That worked out very well in terms of tuning 
> range with a 100pF variable
> capacitor.
>
> Most solutions will work fine at this frequency, 
> stability is unlikely to be
> an issue.
>
> 73, ian K3IMW
> ______________________________________________________________
> HBR mailing list
> Home: 
> http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: 
> http://www.qsl.net/donate.html
> 

From ianmwilson73 at gmail.com  Fri Jun 17 12:03:32 2011
From: ianmwilson73 at gmail.com (Ian Wilson)
Date: Fri, 17 Jun 2011 09:03:32 -0700
Subject: [HBR] HBR-11 Template??
In-Reply-To: <0487886E7C0846338EBE3FCBBBE71D89@Dell560>
References: <408346844.1612826.1308318914901.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
	<1049384928.1614238.1308320645882.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net>
	<BANLkTikUb-QmHCafgTrw5ZdYdkpgv8YGQw@mail.gmail.com>
	<0487886E7C0846338EBE3FCBBBE71D89@Dell560>
Message-ID: <BANLkTi=EOPo1Eudmh8ps-LbfWTafaz1voQ@mail.gmail.com>

Hi Breck,

Here's what the circuit looks like in the Command Set receivers:
  - triode plate to pin 1 (top end of tuned winding)
  - triode grid (through C/grid leak) to pin 2 (top end of untuned winding)
  - decoupled B+ to pin 3 (lower end of tuned winding)
  - can to ground (there are three internal connections to ground)

There are schematics on line, just happened to have the CQ Command Sets
book to hand.

73, ian K3IMW

From smithab11 at comcast.net  Fri Jun 17 12:41:33 2011
From: smithab11 at comcast.net (B Smith)
Date: Fri, 17 Jun 2011 12:41:33 -0400
Subject: [HBR] HBR-11 Template??
In-Reply-To: <BANLkTi=EOPo1Eudmh8ps-LbfWTafaz1voQ@mail.gmail.com>
References: <408346844.1612826.1308318914901.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net><1049384928.1614238.1308320645882.JavaMail.root@sz0139a.emeryville.ca.mail.comcast.net><BANLkTikUb-QmHCafgTrw5ZdYdkpgv8YGQw@mail.gmail.com><0487886E7C0846338EBE3FCBBBE71D89@Dell560>
	<BANLkTi=EOPo1Eudmh8ps-LbfWTafaz1voQ@mail.gmail.com>
Message-ID: <B64DC9D9F9DA48D7AAF0A88ED3729F6E@Dell560>

Thanks  ian

I am familiar with the Command Set wiring and like 
I said  I have tried using the Command set BFO 
coil
 in its original configuration with the feed back 
winding and have not been successful. I would be
interested in hearing from any one who has 
successfully used the coil in a Hartley
configuration in a HBR receiver. We have plenty of 
theory but I would like to see an actual
schematic of a "tested" circuit.    I have of 
course use the coil in a colpitts configuration 
but
this required some modification of the coil.  Info 
on what I have done can be found at:
(http://k4che.com/HBR/BFO%20Coil%20Page%201and%20photos/BFO%20Coil%20Page%20%201.htm)

--------------------------------------------------
From: "Ian Wilson" <ianmwilson73 at gmail.com>
Sent: Friday, June 17, 2011 12:03 PM
To: "HBR Receiver List" <hbr at mailman.qth.net>
Subject: Re: [HBR] HBR-11 Template??

> Hi Breck,
>
> Here's what the circuit looks like in the 
> Command Set receivers:
>  - triode plate to pin 1 (top end of tuned 
> winding)
>  - triode grid (through C/grid leak) to pin 2 
> (top end of untuned winding)
>  - decoupled B+ to pin 3 (lower end of tuned 
> winding)
>  - can to ground (there are three internal 
> connections to ground)
>
> There are schematics on line, just happened to 
> have the CQ Command Sets
> book to hand.
>
> 73, ian K3IMW
> ______________________________________________________________
> HBR mailing list
> Home: 
> http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: 
> http://www.qsl.net/donate.html
> 

From ianmwilson73 at gmail.com  Fri Jun 17 13:38:31 2011
From: ianmwilson73 at gmail.com (Ian Wilson)
Date: Fri, 17 Jun 2011 10:38:31 -0700
Subject: [HBR] Using a BC-453 BFO
Message-ID: <BANLkTimP5+tTompbA4Lisn=Y5v71r12q3A@mail.gmail.com>

I dug out a BC-453 BFO coil (5852 I think) and a 6C4.
The following components were selected only by being close to hand:

  - plate to pin1 of the coil (no idea which is pin1, which pin3; I was
lucky)
  - grid through parallel 47k/0.001uF mica to pin2
  - B+ through 22k to pin3 (see above)
  - cathode to ground
  - solder tag connection to coil metal, grounded
  - 10pF from grid to frequency meter

This worked over supply voltages from 90v to 250v. The tuning range is
about 83kHz to 86.2kHz. You would want to follow Breck's modification
to disconnect the internal variable capacitor to get a bit more range,
probably.

Note that the original Command Set plate decoupling resistor is probably
too high (150k) to work with a 6C4 (which is electrically half a 12AU7 and
is a somewhat high plate-current triode).

Hope this helps.

73, ian K3IMW

From smithab11 at comcast.net  Fri Jun 17 13:54:32 2011
From: smithab11 at comcast.net (B Smith)
Date: Fri, 17 Jun 2011 13:54:32 -0400
Subject: [HBR] Using a BC-453 BFO
In-Reply-To: <BANLkTimP5+tTompbA4Lisn=Y5v71r12q3A@mail.gmail.com>
References: <BANLkTimP5+tTompbA4Lisn=Y5v71r12q3A@mail.gmail.com>
Message-ID: <34EAD8FBDE86456C88B8A1131D3C83F5@Dell560>

Can I post your results to my BFO page? Could you 
take a photo of the
your temporary test setup?

73

breck

--------------------------------------------------
From: "Ian Wilson" <ianmwilson73 at gmail.com>
Sent: Friday, June 17, 2011 1:38 PM
To: "HBR Receiver List" <hbr at mailman.qth.net>
Subject: [HBR] Using a BC-453 BFO

> I dug out a BC-453 BFO coil (5852 I think) and a 
> 6C4.
> The following components were selected only by 
> being close to hand:
>
>  - plate to pin1 of the coil (no idea which is 
> pin1, which pin3; I was
> lucky)
>  - grid through parallel 47k/0.001uF mica to 
> pin2
>  - B+ through 22k to pin3 (see above)
>  - cathode to ground
>  - solder tag connection to coil metal, grounded
>  - 10pF from grid to frequency meter
>
> This worked over supply voltages from 90v to 
> 250v. The tuning range is
> about 83kHz to 86.2kHz. You would want to follow 
> Breck's modification
> to disconnect the internal variable capacitor to 
> get a bit more range,
> probably.
>
> Note that the original Command Set plate 
> decoupling resistor is probably
> too high (150k) to work with a 6C4 (which is 
> electrically half a 12AU7 and
> is a somewhat high plate-current triode).
>
> Hope this helps.
>
> 73, ian K3IMW
> ______________________________________________________________
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From ianmwilson73 at gmail.com  Fri Jun 17 14:22:38 2011
From: ianmwilson73 at gmail.com (Ian Wilson)
Date: Fri, 17 Jun 2011 11:22:38 -0700
Subject: [HBR] Using a BC-453 BFO
In-Reply-To: <34EAD8FBDE86456C88B8A1131D3C83F5@Dell560>
References: <BANLkTimP5+tTompbA4Lisn=Y5v71r12q3A@mail.gmail.com>
	<34EAD8FBDE86456C88B8A1131D3C83F5@Dell560>
Message-ID: <BANLkTim9gusTAT0b69DupHs5sm1Qn36-Zg@mail.gmail.com>

Hi Breck,

You are welcome to post the results. My test setup is exceedingly
bare-bones,
and I would not like anyone to use my construction practices, but I will
take
a picture anyway :)

73, ian

From smithab11 at comcast.net  Fri Jun 17 14:30:43 2011
From: smithab11 at comcast.net (B Smith)
Date: Fri, 17 Jun 2011 14:30:43 -0400
Subject: [HBR] Using a BC-453 BFO
In-Reply-To: <BANLkTim9gusTAT0b69DupHs5sm1Qn36-Zg@mail.gmail.com>
References: <BANLkTimP5+tTompbA4Lisn=Y5v71r12q3A@mail.gmail.com><34EAD8FBDE86456C88B8A1131D3C83F5@Dell560>
	<BANLkTim9gusTAT0b69DupHs5sm1Qn36-Zg@mail.gmail.com>
Message-ID: <2DB84A34B2984066B9975C06B1E9D428@Dell560>

A picture would be appreciated and it would help 
others realize that
when testing circuits everything does not have to 
be pretty, but what
I should not tell them is that when the circuit is 
ugly it always works but
when you clean it up it always fails. 
:-)
now I will have to go back and see what I did 
wrong, maybe I got
pin 1 and 3 reversed.

--------------------------------------------------
From: "Ian Wilson" <ianmwilson73 at gmail.com>
Sent: Friday, June 17, 2011 2:22 PM
To: "HBR Receiver List" <hbr at mailman.qth.net>
Subject: Re: [HBR] Using a BC-453 BFO

> Hi Breck,
>
> You are welcome to post the results. My test 
> setup is exceedingly
> bare-bones,
> and I would not like anyone to use my 
> construction practices, but I will
> take
> a picture anyway :)
>
> 73, ian
> ______________________________________________________________
> HBR mailing list
> Home: 
> http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: 
> http://www.qsl.net/donate.html
> 

From Hopperdhh at aol.com  Fri Jun 17 14:49:46 2011
From: Hopperdhh at aol.com (Hopperdhh at aol.com)
Date: Fri, 17 Jun 2011 14:49:46 EDT
Subject: [HBR] HBR-11 Template??
Message-ID: <6a8df.75c1a258.3b2cfbca@aol.com>



Hi Breck and all,

Years ago I  used a self excited 6BE6 product detector with a BC-453.  I 
just connected  the tuned circuit to the grid through the parallel RC (other 
end of the coil  grounded), and connected the feedback winding (the original 
grid winding)  between cathode and ground.  As I remember, I had to open up 
the can and  reverse the feedback winding so that the original grounded end 
went to the  cathode.

This is very close electrically to a Hartley oscillator  connection.  The 
difference being that the feedback is from a separate  winding to ground 
instead of from a tap on the coil.

Its been a long time  ago, like 1964!

Dan K9WEK



In a message dated 6/17/2011  11:52:35 A.M. Eastern Daylight Time, 
smithab11 at comcast.net writes:
I have  never been able to successfully use the 
Command Set BFO coil in a  Hartley
configuration. We would be interested in your 
results and a  diagram?
Breck k4che  


