[ARC5] BC-AR-429 and RU-18 Connectors - Correction and added info

[Mike Morrow]

A few days ago I made an incorrect statement when I wrote:

> The connector on the earliest SCR-*-183 receivers was 7-pin, but by 1935
> an 8-pin connector became standard.

*All* 21 models of the SCR-A*-183/-283, from 1932 to 1943, have used a connector that requires the 8-pin PL-61.

FWIW, here's a tabulation from my project document about these sets:

SCR-A*-183/-283 System Connectors

Plug   Pins    At Ends of Cable For                   Applicable For*
PL-56   5      Junction Box Power to RC-12 Osc.**      AA to AS
PL-60   2      DC supply to JB                         AA to AS
PL-61   8      JB to Receiver                          AA to AS
PL-62   6      JB to Dynamotor                         AA to AS
PL-63   8      JB to Transmitter Control Box           AA to AS
PL-64   8      JB to Transmitter                       AA to AS
PL-65   6      JB to Receiver Control Box              AA to AG
PL-76   2      JB to Throttle Switch                   AB to AS
PL-77   3      JB to Antenna Relay                     AB to AS
PL-77   3      Receiver to Loop Antenna                AB, AD to AO
PL-104  7      JB to Receiver Control Box              AH to AS

*  Models AI and AM do not exist.
** RC-12 Oscillator (BC-**-183) was not used with SCR-A*-183/-283.

Mike / KK5F