[Hammarlund] Re: Hammarlund Digest, Vol 27, Issue 3

[Julian Bunn]

Thanks Mike ... Yes, I found that strip. The 110 had been extensively worked
on underneath, and there was a short inside the T2 IF can, which I repaired.
Once done, using a Tek FG504 sweep/signal generator I was able to peak the
IF very nicely ... everything was WAY off alignment. Now the IF looks very
good, and I will move onto the RF tuning.

I had to replace the PSU choke, which had fried due to the short in the IF
can I suspect.

Julian

njmikec at optonline.net wrote:
> Hello Julian - the 110 is a great radio.
> Ha!  I just got done with the IF alinnment on a 110 VHF model.
> That was after removing 1" of tar and nicotine from every reachable inch of the radio.
> What a mess it was. Blech.  TSP is great stuff.
> Anyway, the 6BE6 bus line is an open flat exposed (uninsulated) "strip" coming off the 6BE6.
> You can't miss it.  Perfect for attaching your probe.
> If you can't find it, I can send you a picture.
> 
> I'll leave to others to answer #2 & #3.  
> 
> Kind regards - Mike KC2OSO.
> 
> ----- Original Message -----
> From: hammarlund-request at mailman.qth.net
> Date: Wednesday, April 5, 2006 4:00 am
> Subject: Hammarlund Digest, Vol 27, Issue 3
> 
> 
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>>Today's Topics:
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>>  1. HQ-110C Questions (Julian Bunn)
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>>--------------------------------------------------------------------
>>--
>>
>>Message: 1
>>Date: Tue, 04 Apr 2006 08:55:42 -0700
>>From: Julian Bunn <Julian.Bunn at caltech.edu>
>>Subject: [Hammarlund] HQ-110C Questions
>>To: Hammarlund <hammarlund at mailman.qth.net>
>>Message-ID: <443296FE.5030804 at caltech.edu>
>>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>>I have an HQ-110C that has a couple of problems, and am hoping for 
>>some 
>>help.
>>
>>1) The IF alignment instructions talk about connecting the 455kHz 
>>signal 
>>generator
>>to the "bus line" of the mixer grid of V2, the 6BE6 mixer tube. 
>>What is 
>>the "bus line" -
>>I'm not familiar with the term? Which pin on the tube is it?
>>
>>2) I want to add a new grounded mains lead. The existing lead is 
>>old and 
>>cracked.
>>Right now the chassis earth is floating. How should the ground 
>>connection from the
>>mains lead be connected to the receiver?
>>
>>3) The choke L4 in the power supply is open circuit, and needs to 
>>be 
>>replaced. It
>>is specified as 8 Henry, 375 Ohm DC. I don't have an exact 
>>replacement, 
>>but I do
>>have a 5 Henry, 175 Ohm DC unit that I'd like to use if possible. 
>>Will 
>>this work, with
>>a high wattage 200 Ohm resistor in series?
>>
>>Thanks for any advice.
>>
>>Julian
>>
>>
>>------------------------------
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>>End of Hammarlund Digest, Vol 27, Issue 3
>>*****************************************
>>
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-- 
Julian Bunn
Caltech

Tel: +1 626 395 6681
Mob: +1 626 375 4628
WWW: pcbunn.cacr.caltech.edu/jjb.html