[Milsurplus] [ARC5] Soviet 1RSB-70 copy of the AN/ARC-8, Plus Other TU-4 Radio Sets

[Meir WF2U]

Ray,

There is no RSB designation by itself... The RSB-70 is the old designation
for the R-807. For example, there was also another airborne transmitter
system (2 transmitters, covering 1.5 to 12 MHz, looking somewhat like
command set transmitters on steroids), the RSB-5 which is a pre-WW2 design,
and was still used in certain aircraft up to the 60's, which became the
R-805 under the new nomenclature system. 
There was no 400 Hz power supply for the R-807. The dynamotor supply is
practically identical to the DY-13/ART-13 family, except for the 28 VDC
input connector, which is not the 3 prong circular threaded type on the US
models, but a two prong push-on type.
There is a remote-controlled variants of the US-9: the US-9DM. This receiver
is a modification of the US-9 by removing the dial mechanism, and replacing
the front panel with a different one. The tuning and band switching were
done by 400 Hz servos via the pilot's control head, where the function
switch and the other controls were located. This model had an external power
supply, as the servo circuits/motors took up the space where the dynamotor
used to be. It required 115 VAC @ 400 Hz and 28 VDC.
The later remote control receiver was the US-8 (yes, a lower number...),
still using the same shape factor and shock mount as the US-9, but with a
completely different circuit. This receiver has 13 tubes, all standard 7 pin
miniature types; all have US equivalents, like the 6BA6,6BE6, etc. It
requires 24-28 VDC, and 115 VAC @400 Hz for power. I have the complete
system: the 115 VAC/400 Hz input power supply, cable junction box, pilot's
control box (all operating controls, tuning dial, band switch), and plugs. I
just have to make up the cables. 

73, Meir WF2U

Landrum, SC

-----Original Message-----
From: Ray Fantini [mailto:RAFANTINI at salisbury.edu] 
Sent: Thursday, November 29, 2012 8:56 AM
To: Meir WF2U; 'Mike Morrow'; milsurplus at mailman.qth.net
Subject: RE: [Milsurplus] [ARC5] Soviet 1RSB-70 copy of the AN/ARC-8, Plus
Other TU-4 Radio Sets


I have had occasion to see three or four US-9 receivers in person and all
had the front mounted fuse and two pin headphone jack. I do not doubt the
statement about early versions of the radio being identical to the BC-348
but I have not seen this myself and cannot think of any images that I have
seen, but that's just me. Also thought the RSB replaced the R-807 with the
RSB/RPS combination replacing the older R-807/US-9 combinations. Have seen
the RSB/RPS installed in transport and helicopters and in use as late as
1990/2000 but have not seen the R-807/US-9 although I can be mistaken in
confusing the RSB with the R-807 but no mistaking the US-9 with a RPS. Have
to wonder why the US-9 was still in production years after the introduction
of the RPS being that the RPS is superior to the US-9 in all regards?  The
RPS uses just about the same tube lineup as a BC-348Q and also includes
improved reduction tuning, variable IF filter, second stage audio driver,
100 kc calibrator and my favorite an integrated tube tester. The only
drawback is that the RPS uses an external power supply and all I know about
were 115 volt 400 cycle external power supplies. Have to wonder if there was
a 115/400 cycle power supply to be used with the RSB/R-807?

RF