[ARC5] BC-348M

[Joe Connor]

If you haven't found this already, Andy Moorer's site has high-quality downloads of all the BC-348 manuals.

http://www.jamminpower.com/main/bc348.html


Joe Connor



On Friday, December 20, 2013 12:59 PM, Dennis Pharr <wd5jwy at gmail.com> wrote:
 
I am also currently trying to restore a BC-348P model and I have the exact
>same problem - a short across the B+ line.  I suspect the issue is a shorted
>cap as well.  
>
>Also, while tracing the wiring I've noticed a very odd thing - one of the
>six "canned" .5uf 250V caps (39-1) has buss wire shorting the terminals.
>The buss wire shorting the cap appears to be "as-built" since the pictorial
>wiring diagram also shows this cap as being shorted.  I can't understand why
>the designers would include a large canned capacitor in the design and then
>specify it as shorted in the documentation.
>
>If it was a last minute design change (possibly during production runs), you
>would think they would modify the design and leave out that Cap on
>subsequent production runs.  
>
>It just seems to be a very odd thing, but maybe I'm missing something.
>
>73
>Dennis
>WD5JWY 
>Oklahoma City  
>
>-----Original Message-----
>From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
>Behalf Of Tom Elmore
>Sent: Thursday, December 19, 2013 9:44 PM
>To: 'arc5 mail list'
>Subject: [ARC5] BC-348M
>
>I am in the process of bringing a BC-348M< back to life. Is it correct that
>pins 2 & 6 are the receiver muting when paired with a transmitter? It
>appears I need to short them together to provide B+ for some of the tube
>screens.  It also appears I have a short (probably a cap) on pin#2 somewhere
>in the chain.
>
>
>
>
>
>
>
>
>
>Thank You 
>
>
>
>Tom Elmore KA1NVZ
>
>Anchorage, Alaska 
>
>
>
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