[Boatanchors] BC-348 E-M-P

Al Klase al at ar88.net
Thu May 12 22:15:59 EDT 2011


Hi Joe,

Years ago I had a similar problem with APC trimmers in a Navy receiver, 
an RMB or RBS, as I recall.  I was able to make a tool by grinding away 
at a small C-clamp that allowed me to press the rotors back into 
position, and apply solder to fix the hex adjuster nut to the shaft.  
Wish I could provide a drawing, but it was along time ago.  Use your 
imagination.  My recollection is, that on the Navy radio, I was able to 
repair the APC's /in situ/.

Al

On 5/12/2011 8:47 PM, Joe Walden wrote:
> Hello members of the various reflectors,from Joe w5jdy in Okla.....  I want
> to share an experience I am having with a BC-348-P receiver.  This radio had
> been setting in a dry temperature controled environment for about 40 years.
> It was working when it was stored.  Upon reviving the external power supply
> and connected it to the radio,it didn't play hardly at all.  Some bands were
> partially dead and others were entirely dead.  After trouble shooting I
> found that about 5 or 6 of the 30 or so alignment APC trimmer caps located
> in the Ant,RF,Det and Osc boxes had shorted. They had slipped on the shaft
> someway and shorted the plates together.  In all the old parts I have I will
> be able to replace most of the bad ones (I hope) but during removal of one
> of them the lead broke off of a 50pf mica cap right up next to the case.
> Too close to repair.  My 2 questions are:   Has anyone else experienced
> trouble with the trimmer alignment caps in other BC-348?   And can anyone
> help me with a silver mica 50pf at 400 volts 1%.    Pleas contact me off
> list atw5jdy at cox.net     Thanks, Joe
>
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-- 
Al Klase - N3FRQ
http://www.skywaves.ar88.net/



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