[ARC5] BC-454-B listed in THAT place.

[J Mcvey]

OK on the taps, but what determined if the lo-z was used or not?. I have "B" models that have the taps but are wired for hi-z.
 

    On Monday, August 15, 2016 11:39 AM, WA5CAB--- via ARC5 <arc5 at mailman.qth.net> wrote:
 

 No. The "-B" models (or most of them) were made by Western Electric.  The first few thousand were still painted black wrinkle but the majority were unpainted.  The "-B" models also have the 250 ohm (Lo-Z) tap on the receiver audio output transformer and two of the transformers in the modulator.  Which isn't visible from the outside.  Note 3 on the transmitter system schematic in later T.O. 08-10-50 says 600 ohms but Signal Corps practice at the time was to call it 250.  Nameplates on the receivers and transmitters were also moved to the right side of the chassis on the unpainted ones.  Which made sense for several reasons.

In a message dated 08/15/2016 08:47:20 AM Central Daylight Time, arc5 at mailman.qth.net writes: 

Doesn't a "-B" model imply a remanufactured unit? I had a BC-455-B once that was remanufactured for the Royal Canadian Air Force  and all the capacitors were replaced with modern molded ones.  That receiver picked up McMurdo Station one winter night when I was living on Martha's Vineyard back in the early '70's.
  Jay
 



Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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