[Hammarlund] Hammarlund Digest, Vol 145, Issue 1

Tue Jun 7 17:50:52 EDT 2016

Hi, Maybe this is off-topic, but................
Today, I found the second failed disk cap, in my long ham journey. I restore old receivers and vintage test equipment for fun. A couple of years ago, I found a shorted .001 disk cap in a lab quality inductance bridge. Today, I found a leaky (50K ohms) .1 disk.
I've replaced literally buckets of BBODs, brown tur*s, and several micas. I don't even bother to test these caps any more. EVERY paper cap in my 75A-4 was leaky as well as one mica.
I still have never found a bad dog bone (as found in my 51J-3), but ya never know.

ron
N4UE

PS: I wish I'd have kept all those BBODs. Man, I'd be rich!!!!! They would be on eBay tomorrow......

-----Original Message-----
From: hammarlund-request <hammarlund-request at mailman.qth.net>
To: hammarlund <hammarlund at mailman.qth.net>
Sent: Tue, Jun 7, 2016 5:12 pm
Subject: Hammarlund Digest, Vol 145, Issue 1

Send Hammarlund mailing list submissions to
	hammarlund at mailman.qth.net

To subscribe or unsubscribe via the World Wide Web, visit
	http://mailman.qth.net/mailman/listinfo/hammarlund
or, via email, send a message with subject or body 'help' to
	hammarlund-request at mailman.qth.net

You can reach the person managing the list at
	hammarlund-owner at mailman.qth.net

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Hammarlund digest..."

Today's Topics:

   1. HQ-180 Mods (k2cby)
   2. Re: HQ-180 Mods (RAY FRIESS)
   3. Re: HQ-180 service bulletins and recommended mods (K3PID)
   4. Re: HQ-180 service bulletins and recommended mods (Kenneth Grimm)
   5. Old Radio Find - part 2 in HD (Jim Murph)
   6. HX-500 Dial drum chain stringing (Jeff)
   7. Hammarlund ED-4 Transmitter (Bill)

----------------------------------------------------------------------

Message: 1
Date: Tue, 24 May 2016 16:32:28 -0400
From: "k2cby" <k2cby at optonline.net>
To: <hammarlund at mailman.qth.net>
Subject: [Hammarlund] HQ-180 Mods
Message-ID: <[email protected]>
Content-Type: text/plain;	charset="us-ascii"

Ray,

You may have less trouble than you think.

You say that the static is present even when the volume control is all the
way down.

This means that the source of the noise is somewhere downstream of the audio
gain control.

The only things in that neighborhood are the audio amplifier and the output
stage.

Take a rather large (.01 to 0.1 uF) capacitor. Connect it between the
control grid of the output tube and ground. If the noise goes away, the
problem is somewhere between the volume control and the grid of the audio
output tube.

My bet would be a leaky coupling capacitor between the plate of the audio
amplifier and the grid of the output tube.

If that is OK the next place to look is the cathode bypass of the audio
stage.

/Miles, K2CBY

Miles B. Anderson, K2CBY
16 Round Pond Ln.
Sag Harbor, NY 11963

k2cby at optonline.net

------------------------------

Message: 2
Date: Tue, 24 May 2016 14:49:29 -0600
From: RAY FRIESS <rayfrijr at msn.com>
To: k2cby <k2cby at optonline.net>, "hammarlund at mailman.qth.net"
	<hammarlund at mailman.qth.net>
Subject: Re: [Hammarlund] HQ-180 Mods
Message-ID: <SNT148-W728F10A022DC30C1420C0CA4F0 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

Thanks for the heads up.   Have had my license since I was 16, so I should be able to summon up enough ability and
smarts to try this. 50 years as a ham ... I should have learned something, but it's always nice to have the advice and
thoughts of other old timers...  HI HI.

> From: k2cby at optonline.net
> To: hammarlund at mailman.qth.net
> Date: Tue, 24 May 2016 16:32:28 -0400
> Subject: [Hammarlund] HQ-180 Mods
> 
> Ray,
> 
> You may have less trouble than you think.
> 
> You say that the static is present even when the volume control is all the
> way down.
> 
> This means that the source of the noise is somewhere downstream of the audio
> gain control.
> 
> The only things in that neighborhood are the audio amplifier and the output
> stage.
> 
> Take a rather large (.01 to 0.1 uF) capacitor. Connect it between the
> control grid of the output tube and ground. If the noise goes away, the
> problem is somewhere between the volume control and the grid of the audio
> output tube.
> 
> My bet would be a leaky coupling capacitor between the plate of the audio
> amplifier and the grid of the output tube.
> 
> If that is OK the next place to look is the cathode bypass of the audio
> stage.
> 
> /Miles, K2CBY
> 
>  
> 
> Miles B. Anderson, K2CBY
> 16 Round Pond Ln.
> Sag Harbor, NY 11963
> 
> k2cby at optonline.net
> 
>  
> 
> ______________________________________________________________
> Hammarlund mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hammarlund
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Hammarlund at mailman.qth.net
> 
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

------------------------------

Message: 3
Date: Tue, 24 May 2016 20:05:09 -0500
From: "K3PID" <Ron.K3PID at sbcglobal.net>
To: "Les Locklear" <leslocklear at hotmail.com>,
	"Hammarlund at mailman.qth.net" <hammarlund at mailman.qth.net>
Subject: Re: [Hammarlund] HQ-180 service bulletins and recommended
	mods
Message-ID: <AC3F0E81C882415CA6F5EC048296503C at Zeus>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

There is a pretty good AGC upgrade by WA8SAJ in the Sept 2014 issue of 
Electric Radio ( #304). I did it on my 180 and I like the results. Also, 
there is a series of videos on YouTube that cover the alignment of the 
receiver.

Ron K3PID

------------------------------

Message: 4
Date: Wed, 25 May 2016 07:35:06 -0400
From: Kenneth Grimm <grimm at sbc.edu>
Cc: "Hammarlund at mailman.qth.net" <hammarlund at mailman.qth.net>
Subject: Re: [Hammarlund] HQ-180 service bulletins and recommended
	mods
Message-ID:
	<CAN1acjbd+wVaeUR0_+EojXp8gNLSCtUt14Jg4XLVb2VA=pvHLw at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

I suffered a similar problem with an HQ-170 several years ago.  I
fortunately found a break in the wire in the first level of winding and was
able to repair it without too much trouble.

For more serious winding damage, this web site might provide a little
encouragement and inspiration:
http://www.w0ybs.com/w0ybs_004.htm

73,
-- 
Ken - K4XL
BoatAnchor Manual Archive
BAMA - http://bama.edebris.com

------------------------------

Message: 5
Date: Wed, 25 May 2016 16:00:28 -0500
From: "Jim Murph" <Murph at k5cxo.net>
To: "Hammarlund" <hammarlund at mailman.qth.net>
Subject: [Hammarlund] Old Radio Find - part 2 in HD
Message-ID: <0B11D26A548F41A096E464189068C7D9 at Murph7PC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=response

I am still talking with the estate owner about opening this up to the 
public.
I should have answer in 24hrs. I did use a better camera with HD 
capabilities,
still some very low lighting problems. I think the better quality video will 
help the drool factor.

https://youtu.be/ZtcGAZ8KBNs

Jim K5CXO 

------------------------------

Message: 6
Date: Mon, 30 May 2016 21:07:47 -0400
From: Jeff <jeff at podengo.com>
To: hammarlund at mailman.qth.net
Subject: [Hammarlund] HX-500 Dial drum chain stringing
Message-ID: <c2953957-5ad5-603d-3ba8-847ebdb641a9 at podengo.com>
Content-Type: text/plain; charset=utf-8; format=flowed

Anyone ever had to restring the dial CHAIN for the HX-500?  The pointer 
string is covered in the manual, but the ball chain that drives the dial 
drum is not.

I am having trouble seeing how this is supposed to move through the 
pulleys: nothing seems to line up.  When I think I have it, it ends up 
creating considerable tension on the line and eventually slips. I don't 
want to strip the pulleys on the band switch or the drum, so I'd 
appreciate any advice anyone might have to offer as to how it is 
properly routed.

The rig is running well now!

73

Jeff

WB3JIH

------------------------------

Message: 7
Date: Tue, 7 Jun 2016 17:09:56 -0400
From: Bill <bmarx at bellsouth.net>
To: Hammarlund <hammarlund at mailman.qth.net>,	Florida BoatAnchors
	<FLBOATANCHORS at yahoogroups.com>,	DRAKE <drake at mailman.qth.net>,
	Hallicrafters at mailman.qth.net,	Vintage-Radio
	<Vintage-Radio at mailman.qth.net>,	"Radios Old /Swap list/Qth.net"
	<boatanchors at qth.net>,	Radio/ BASwaplist <baswaplist at muchstuff.com>
Subject: [Hammarlund] Hammarlund ED-4 Transmitter
Message-ID: <fc5505fd-fbda-ccaf-a0b7-d7fbea9dd84a at bellsouth.net>
Content-Type: text/plain; charset=utf-8; format=flowed

A friend is looking for a Hammarlund ED-4 Transmitter.

Please send me a note if you have or know of one for sale.
Bill W2CQ

------------------------------

Subject: Digest Footer

______________________________________________________________
Hammarlund mailing list
Home: http://mailman.qth.net/mailman/listinfo/hammarlund
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Hammarlund at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com **

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

------------------------------

End of Hammarlund Digest, Vol 145, Issue 1
******************************************