[ARC5] [Milsurplus] B-10 Exported with SCR-134, SCR-183

[David Stinson]

----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>

> There's something fascinating about the very odd taxonomy of 
> the early
> SCR-A*-183 sets.  Here are the first six sets, in chronological 
> order by order number date:
>
> ---SET----  ORDER DATE  RECEIVER   TRANSMITTER  MANUFACTURER
> SCR-AA-183  06/25/1932  BC-AA-179  BC-AA-180    A.R.C.
> SCR-AC-183  03/15/1934  BC-AB-199  BC-AB-200    A.R.C.
> SCR-AD-183  03/15/1934  BC-AD-199  BC-AD-200    Graybar for 
> WECo.
> SCR-AB-183  04/19/1934  BC-AD-219  BC-AD-200    Graybar for 
> WECo.
> SCR-AE-183  06/05/1935  BC-AE-229  BC-AE-230    A.R.C.
> SCR-AF-183  07/27/1935  BC-AF-229  BC-AF-230    Graybar for 
> WECo.

The really "odd duck" is this array is the -AF variant.
The -AD and -AE of 1934 incorporated many
improvements over the earlier models.
But then along comes the -AF in 1935, and it is
wire-for-wire and nut-for-bolt identical to the
less capable first sets, except that the -AF transmitter
coil mount is built to exclude -AD and -AE coils.
Why would someone order a run built the that standard?
Perhaps an "export model?"   The earlier sets might
have gone to export rather than be scrapped and
the end-users might have asked for more.
Can't be a screw-up in the procurement-
someone grabbed out-dated prints-
because they incorporated the coil exclusion.
Who knows?  Unless one of the three people
in the universe who care "hits the lottery" and can
spend a few months in the archives, we'll never know.

73 DE Dave AB5S