[Hammarlund] Re Hammarlund re Caps

[Al Parker]

Hi Rick,
    It's been a long while since I was into an HQ-129, so I don't remember 
just how many of those "domino" looking caps it may have had.  But, they are 
paper caps, not mica, as they'd have you think, and they can be bad just as 
easily as BBOD's.  Kevin's thoughts on screen bypasses are good, and also 
look at interstage coupling caps, particularly if they are dominos.
73,
Al, W8UT
New Bern, NC
www.boatanchors.org
www.hammalund.info

----- Original Message ----- 
From: "Rick Gouge" <rickgouge at shaw.ca>
To: <Hammarlund at mailman.qth.net>
Sent: Monday, December 21, 2009 5:08 PM
Subject: [Hammarlund] Re Hammarlund re Caps


>I would like to thank everyone for there help on the HQ129X. I went ahead 
>and recap the receiver with the caps that i had in stock. First i recap the 
>powersupply and tried the receiver to see how much it had improve. the hum 
>was gone and i had half decent audio and the BFO was working as well. I let 
>the receiver run for about half an hour< Then the BFO stop working and the 
>Audio started to go crappy. I knew then i had to finish the job of 
>recapping, which i did this morning. then i tried the receiver again. Still 
>no BFO. So i started looking around for more caps and check a few resistors 
>around the 6SN7 tube, I replace the 360ohm 1 watt resistor with a 2 watt. 
>which is all i  have right now.  I found more caps in a can on the 
>underside of the 6sj7 tube which fix the BFO. I have been lisening to 20 
>meters now for about 45 minutes and i am getting loud crackle noise once in 
>awhile then it clears up for awhile then the crackle comes back again. To 
>me it sounds like a cap breakin
> g down in the audio section but i replace them all. The only caps that i 
> did not replace where the ones that look like dominos. Maybe thats my 
> problem?  Rick VE7RiK
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