[Milsurplus] [ARC5] SCR-A*-183/283 Data From My Manuals and Other Sources

[Kludge]

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Mike Morrow
> There was a recent discussion about the frequency coverage of the
receivers
> in this series.  For most of these sets there was **theoretically** a full
> set of receiver coils that could allow coverage from 150 kHz up to 12500
kHz,
> but AFAIK there were NO ACTUAL receivers issued with coils sets other than
> those for the limited ranges shown above.  The most accurate statement
does
> seem indeed to be the one that Dave made about receiver coverage ending at
> 7700 kHz.

I agree to a point however it's important to note that the mere existence of
the coils implies that not all circumstances were covered by the basic coil
sets.  It would be fair to say that for typical command use, the coil sets
that stopped at 7700 KC would be adequate but this wasn't an
all-encompassing condition.  To use your example of the SCR-AG-183, it came
out about the same time as the B-15 bomber (Actually, the single model built
was produced in 1934, a year earlier.) which also carried the BC-AA-191
transmitter.  In the photos I've seen, the receiver used with this
transmitter was a BC-A*-229 with a BC-**-183 BFO for CW.  The BC-AA-191 went
up to 12,500 KC, same as the extended range coil sets under discussion.  The
B-17, on the other hand, came out in 1935 and the very early ones probably
had the same type installation since the BC-224 wasn't produced until 1936.


As to the later coil sets, the only thing I can see at the moment is someone
copying previous contracts rather than actually thinking out the process and
eliminating what wasn't needed.  The only alternative would be that someone
considered the possibility of the BC-A*-229's continued service as a liaison
receiver with the BC-191 rather than or along with the BC-224.  It would be
interesting to discover something that indicated actual production runs to
find out how many were actually produced, if any.

>From what I can see in the manual, the RU-2 receiver was a stand alone unit
intended for use with something other than a GF transmitter.  As mentioned
previously, it was more likely a follow up to the RU-1 while the GF receiver
was more likely a variation on the RU used in the original Navy flight
tests.  The RU-1 and RU-2 were produced in time for the early GO
transmitters and I'm prone to believe that was their intended purpose.

For the most part, your lists and mine agree although mine probably have
more coffee stains and occasional cigarette burns.  :-)

Best regards,
 
Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP BGI 
I am me.  I’m the only one who’s qualified.
http://www.nationalmssociety.org/chapters/NTH/index.aspx
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Hiki Nô!