[Milsurplus] [ARC5] "Bandspreaded" R25/ARC-5

[Kenneth G. Gordon]

On 5 Feb 2016 at 8:54, D C _Mac_ Macdonald wrote:

> AFAIK, the AGC in ARC-5 type radios is just like other radios of this
> vintage. It works only with AM signals. 

Not so in the case of the later AN/ARC-5 receivers, Mac. 

The AGC detector diode is in the 2nd IF tube (12SF7) in order to prevent the 
BFO from affecting the AGC. The AGC is never turned off, whether the 
receiver has its BFO on or off.

Therefore, AGC works on CW in those receivers.

Ken W7EKB