[ARC5] My ARC-5 40 meter station

[Mike Morrow]

>>The SCR-274-N and ATA transmitters mentioned in this thread use PA screen modulation, not plate, in the military systems.  Only the AN/ARC-5 transmitters are plate and screen modulated.
>>Mike / KK5F

>I didn’t know that. What modulator do they use? The only mod unit I’m familiar
>with is the MD-7 and it is plate/screen.

Refer to the article at
 http://en.wikipedia.org/w/index.php?title=AN/ARC-5
for a concise presetation of these three command sets and their differing components.

The modulators are
ATA:  CBY-50083 or CCT-50083.  Screen mod./one 1625
SCR-274-N:  BC-456-A, B, or E.  Same as ATA except sidetone AF Z.
AN/ARC-5:  MD-7/ARC-5.  Plate and screen mod./two 1625

The differences may be studied in detail by referring to the manual copies at the links cited at the bottom of the above wiki article.

Mike / KK5F