Do you have the rear panel switch on? Pin 8 is in parallel with the front panel 
pushbutton, so it will power on/off the KPA500 under the same conditions as the 
front panel power button.

73!
Jack, W6FB


> On Oct 31, 2019, at 12:35 PM, DAVID INGEBRIGHT <[email protected]> wrote:
> 
> I'm wanting to utilize the AUX connector pins on my KPA 500 to remotely turn 
> on and off the amplifier. The interface diagram on pg 25 of the manual shows 
> pins 8 and 12 can be momentarily shorted to control the power. (#8 grounded) 
> My plan is to do this via a 1216 webswitch. But when I touch 8 and 12 
> together, nothing happens. I've checked and verified all plugs tight and pins 
> are correct. Possibly I need to pull 8 low with -12volts? I know a lot of you 
> leave your amp in STBY all the time but I'd like the flexibility to turn it 
> off and on remotely with extra contacts on the webswitch. 
> Thanks de dave WB7ELY
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