[ARC5] [Milsurplus] Addenndum: TU-4 vs. B-29 Radio Sets

[John Watkins]

Hi Meir,  actually, the SG-2S replaces the 991 and as you said, a much better solution for regulating voltages.

John. WD5ENU


Sent from my iPad

On Nov 27, 2012, at 12:46, "Meir WF2U" <wf2u at ws19ops.com> wrote:

> Mike,
> 
> The extra tube in the US-9 is an octal VR type tube (Russian tube
> nomenclature SG-2S, 72 V firing voltage) for regulating the local oscillator
> voltage. A much better solution than the 991 neon bulb in the Amerikanski
> BC-348 receivers...
> 
> I have the schematic of the US-9. In fact, I have the whole manual in PDF.
> I also have the schematic of the US-9DM model as well.
> 
> 73, Meir WF2U
> Landrum, SC
> 
> 
> 
> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
> Behalf Of Mike Everette
> Sent: Tuesday, November 27, 2012 7:31 AM
> To: arc5 at mailman.qth.net; milsurplus at mailman.qth.net; Mike Morrow
> Subject: Re: [ARC5] Addenndum: TU-4 vs. B-29 Radio Sets
> 
> The Russki BC-348 copy has one more tube than the US original, at least
> according to eBay pictures I have seen.  Looks like they may have had
> examples of both types of BC-348, and...
> 
> "What we do, Comrade?"
> 
> "Stalin says 'Make like Amerikanski or we go to Gulag!"
> 
> "We make like BOTH?"
> 
> "Da, Comrade!"
> 
> Anyone have a skematik of the US-9 (BC-348) receiver?
> 
> There are stories of how even repair patches to cover battle damage on the
> impounded B-29s were copied... as well as the interior paint job.  Seems the
> factory had run out of green chromate primer, and painted part of the inside
> of one B-29 with white lead.  Supposedly the insides of Tu-4s were
> green-and-white, as a result.
> 
> My source is a book titled "Soviet Superfortress" which can be found on
> amazon.
> 
> 73
> 
> Mike
> W4DSE
> 
>> 
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