[Milsurplus] BC-348-C (S)

[Jim Whartenby]

According to Ken Corwin, KF6NUR (SK?), from his 16 Dec 1998 paper:  https://web.archive.org/web/20120221010321/http://nj7p.org:80/history/bc-348.html
"The BC-224-A, -B, -C, and -D; and the BC-348-B, and -C, tuned 1.5-18 mc in six bands. The Signal Corps hadthe receiver design modified to add a 200-500 kc band and compress the 1.5-18 mc coverage into the remainingfive bands. This modified design became the BC-224-E and the BC-348-E. The 200-500 kc and 1.5-18 mctuning range remained constant for subsequent production of all models. 
In 1943, the Signal Corps (or RCA) hadBelmont Radio remanufacture some of the RCA-manufactured BC-348-Cs to include the 200-500 kc band. Thisremanufactured receiver became the BC-348-S. While the BC-224-A used a BD-94-A (14-V) dynamotor and anFT-154 mounting, all the BC-224-B/BC-348-B and later receivers used DM-24 (14-V) and DM-28 (28-V)dynamotors, FT-154 (lettered series) and FT-167 mountings, PL-P103, PL-Q103, and PL-Q103-A plugs."
Regards,Jim

Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 

    On Thursday, June 22, 2023 at 02:59:56 PM CDT, Robert Downs via Milsurplus <milsurplus at mailman.qth.net> wrote:  
 
 
Fairly early in WW-II the Army Air Corps quit issuing the 5-band BC-348’s that did not cover the LF 

band below 500 KC because most of the aircraft equipped with the BC-348 were going to parts of the 

the world where many of the airports were not equipped with HF equipment.  The Army Air Corps quit 

installing the early model BC-348’s in most of the bomber fleet.  I have never seen this mentioned in 

official documents but there must have been a significant quantity of un-issued BC-348-C’s on hand 

and someone decided to convert them to 6-band units which got the model BC-348-S assigned.  This 

was not repeated so either it didn’t save much money or there weren’t enough unissued A, B or D models 

to make it worth doing.  

  

  

Robert Downs

  

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of RODNEY HOGG
Sent: Thursday, June 22, 2023 13:30
To: Milsurplus
Subject: [Milsurplus] BC-348-C (S)

  

After several posts on the BC-348 and modifications, I have a question.  I have a 

BC-348-C made by RCA and has another tag, "modified by Belmont, BC-348-S".

>From what I can determine the modification was done to add the LF band.  Was 

anything else done?  Haven't been able to determine what all it entailed.

It has been further modified to include an AC power supply and an added

meter, "S"?  Came from engineering lab at state university.

Just curious. Any help?

I also have a BC-348-P by Stromberg-Carlson.  It is complete with H/B

built in power supply.   Both will be put on my auction soon.

  

Rod

K0EQH

  
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