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

[Meir WF2U]

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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