Control Signal Information

We only sold one 'barebones' system so we aren't making them available anymore but the info here does describe the signals used to control the amplifier and may be useful to builders trouble shooting or hacking the amplifier.

There is a 20 Pin header on the amp PCB with all of the control signals. Here is the pinout:

If no other filters are selected the 160M filter is connected.

No Drain Tuning Caps are used on 160, 80, 40 or 6 meters.

Drain tuning cap #1 is used on 10, 12, 15, 17 and 20 meters.

Both drain tuning caps are used on 30 meters.