[MRCA] AN/GRC-9 Keying in Phone Position

[w8au at sssnet.com]

At 07:32 PM 8/3/06, Bill Ramsey wrote:
>   The normal wiring for the AN/GRC-9, when in Phone position, turns the
>filaments of the transmitter stage off. In MCW or CW positions, the
>filaments stay lit allowing for quick keying. I am sure there is a 
>reason for this, but I am not sure what it is (heat reduction?).

Simple:  the delay would kill any dits and maybe even the dahs.

>Anyway, is there a published "safe" modification for the keying/mode
>wiring that allows for faster keying times when in the Phone 
>position? (It takes a while for those filaments to warm up. Hard to 
>be heard that way. :)

Usually not a drawback to have a short delay on Phone.  But you could
rig it to have continuous filaments on Phone, too.

(As long as you're running an AC ps, the guy cranking the hand gennie 
won't complain)  :-)

Perry   w8au