[Boatanchors] BC-342 WTT and recapping questions

[Joe Connor]

Ian:

      These are neat receivers and well worth the effort to restore. 

      1. There is a cap (usually a notoriously bad Micamold) hiding in the RF Oscillator box;


      2. If I remember correctly, there's also one (usually a Micamold) hiding in the BFO box;

      3. There an audio cap buried behind the front panel, right in front of the audio output tube; 

      4. There are several (usually Micamolds) buried in each of the RF boxes attached to the bottom of the chassis. You have to do a fair amount of disassembly to remove these boxes to get to the caps inside but these caps are almost guaranteed to be leaky and replacing them definitely improves performance; 

      5. There are several caps in the three IF boxes; and

      6. The square multi-cap cans on the back of the RF tube shelf can be a challenge. I have attached a video showing one fellow's solution. I've also used small mylar caps and heat-shrink tubing. 

      Here are two videos pertaining to recapping a BC-342. I found these tapes very helpful before I tackled one of these beasts for the first time.

http://www.youtube.com/watch?v=0jaiebGjPJo


http://www.youtube.com/watch?v=ydd_JNQmcf8


       Here's another tape showing how one fellow dealt with those square multi-cap cans on the back of the RF tube shelf:

http://www.youtube.com/watch?v=aJwanwSgK5A


                                              Joe Connor



>________________________________
> From: Ian Wilson <ianmwilson73 at gmail.com>
>To: Boatanchors <Boatanchors at mailman.qth.net> 
>Sent: Sunday, June 30, 2013 4:57 PM
>Subject: [Boatanchors] BC-342 WTT and recapping questions
> 
>
>I am planning on restoring a BC-312. I have the front panel and
>controls from a BC-342. So my first question is:
>
>  - anyone have a crystal phasing unit to trade/sell?
>
>Secondly, since I will have the front panel off, etc, this seems
>like a good time to recap. I seem to have replaced a few caps
>last time I had the radio open, but perhaps I should do more. Are
>there any hidden in the CW oscillator can and/or other non-obvious
>places?
>
>Not clear what has been done to the radio. There is an S-meter.
>The IF has been brought out to a connector, perhaps for a
>Q-multiplier or Panadaptor. The detector output has been brought
>out to the front panel also.
>
>There only seems to be one audio transformer. An AC supply
>has been added (this is the best job that I've seen of any radio
>that has been modified this way, incidentally).
>
>73, ian K3IMW
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