Programming interface schematics for Icom:
Programming software for Icom IC-706 (Icom IC 706 IC706) :
PDF Service Menu for Icom IC-706 (Icom IC 706 IC706) :
PDF Service Manual with schematics for Icom IC-706 (Icom IC 706I IC706) : Icom IC-706 (Icom IC 706 IC706) Operating manual
Schematics for Icom IC-706 (Icom IC 706 IC706) :
If you can spare more than 0.3 Amps from battery on /p operation
switch off backlight of yellow display (Initial Set Mode, item 5.)
This helps much, i have only abt 1.1 Amps for receive now
I did not find any info in the manual