[MrFixr55]

Hi Mike,

A couple of apologies:

I missed part of the thread. Touching, how you got into electronics. My dad totally supported my experimentation. When I sent you the schematic of the 10C, I forgot that you had the 10A. However, my last post does hold up. There is a warning to not hook up the ground to the negative battery terminal in the 10A the ground connection was the center post of the standalone rheostat between the first and second stage. This is interesting; it seems to be used to adjust the bias on the RF stages. The legs of that rheostat go between A+ and A-. There must have been a mid model mod, as there is no ground post in the AK installation guide, it's a white wire in a 6 wire harness but your set seems to match the Radiomuseum diagram for the "10A with cable". If you have a 5 wire harness cable, the green(B-) and black (A-) are tied together at the radio, red is A+, yellow is B+ for the detector and brown is B+ for the rest of the tubes.

Hope this helps.