[Milsurplus] BC-342/BC-344 Question

[hwhall at compuserve.com]

Note that not all Micamold caps, or ones that look like Micamold, are wax & paper. Some are mica insulated & not likely to have gone bad. The really small pF values are likely real mica. I try to test them all before replacing.

WayneWB4OGM

-----Original Message-----
From: Robert Kilian <robertkilian at ostechnologies.net>
To: Joe Connor <joeconnor53 at yahoo.com>; Milsurplus <milsurplus at qth.net>
Sent: Tue, Nov 5, 2019 12:37 pm
Subject: Re: [Milsurplus] BC-342/BC-344 Question

 The wax-paper Micamold caps (that look like dominos) typically have gone bad, and there are a handful used as B+ bypasses that are absolutely critical to be replaced.  Unfortunately, some of those are in the RF/IF cans which be slightly tricky to remove, but not bad if you document connections with photographs and take your time.
 
 I've never encountered a bad oil bathtub in one of these sets, but others may have had different experiences.
 
 Rob Kilian
 K6RBK
 
 Additionally
 
 On 11/5/19 10:32 AM, Joe Connor via Milsurplus wrote:
  
 
 What's the current thinking on cap replacement in these receivers? I wouldn't trust the 75-year-old electrolytic caps in the power supply or the Micamolds located throughout the set, but what about the oil-filled bathtub caps? Do you replace them as a matter of routine, or do you wait until one of them acts up? 
  The triangular piece of metal attached to the Vernier knob has some rust. What do you folks use to clean and shine a piece like that? 
  As always, thanks for your guidance.  
                          Joe Connor
  
  
   
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