[NLRS] Interfacing a TR751

[W0ZQ at aol.com]

Donn has it right.   My TR751A has a  funky four pin ACC connector in the 
back where the pins are in a diamond  configuration with the fourth pin in the 
middle of the triangle.    Looking at the schematic, the two pins that form the 
SPST switch are at 12  o'clock and 4 o'clock.  This is a normally open relay 
contact that shorts  on PTT.  The pin in the center of the diamond is chassis 
ground while the  pin at 8 o'clock is ALC input.   You should be able to 
confirm this  with an ohm meter.   I would suggest that you modify the rig and get  
rid of that funky connector.

73, Jon
W0ZQ 



************************************** See what's new at http://www.aol.com