[ARC5] More SCR-183 Trivia

[Mike Morrow]

Michael wrote:

> The top one on the left is from the SCR-AA-183 as well. But note that there
> is a BC-AD-199 and a BC-AD-219, two different receivers that are marked as
> being for the SCR-AD-183.

The BC-AD-219 went to the SCR-AB-183.  Logical!

That's from the funny and confusing era of SCR-A*-183 nomenclature and
contract dates.  I wonder how many units of the following still survive:

SCR-AA-183 used the BC-AA-179 and BC-AA-180  (Contract: 06-25-1932)
SCR-AB-183 used the BC-AD-219 and BC-AD-200  (Contract: 04-19-1934)
SCR-AC-183 used the BC-AB-199 and BC-AB-200  (Contract: 03-15-1934)
SCR-AD-183 used the BC-AD-199 and BC-AD-200  (Contract: 06-05-1935)
SCR-AE-183 used the BC-AE-229 and BC-AE-230  (Contract: 06-05-1935)

I doubt there was very much difference between any of these five
receivers, except maybe the loop antenna connections (posts or plug).

At least for the AE variation and later, the numbers stopped changing.

My manual for the SCR-AG-183 says that the BC-AG-229 was supplied as
the receiving equipment for the SCR-AC-187 liaison set.  There's no
mention of the BC-A?-183 heterodyne oscillator, nor any diagrams or
other details of the SCR-AC-187.  The contract date is 11-25-1935.

Mike Hanz has kindly put T.O. 08-40SCR-1 from 1944 on his site.  It lists
component interchangeablity for the SCR-A*-183 and -283.  There is a table
which summarizes what components went to each variation.  See:
  
  http://aafradio.org/docs/SCR-183-283_interchangeability.pdf

Very useful!

Mike / KK5F