Every step forward revels three additional steps. Ok, so now I know way more about key line interlocks and PTT returns and the like and have my RF-1110B and RF-1310 working together along with making power on amplifiers 1 and 2 and one driver, just need to now resolve blown FET in “B” driver and one of the MRF-150 devices that’s just decided to short gate to source but that’s the little issues because I am content to just live with one side working for now.

The new problem now is having to build some form of T/R switching so I can get the radio on the air along with the companion receiver.

Figure I can use a Dow Key Relay for the T/R switch and was looking at the two signals available on J-8 the accessory port. First is the PTT Key Line that’s jumped (B-D) and appears to be held high and goes low when keyed, then there is a exciter interlock that’s jumped(I-J) on the same plug that’s low and goes high when the transmitter is keyed. What would be better to use? The exciter interlock looks like maybe its generated after the PTT line and maybe that’s best? Or are they both available at the same time?

Going to assume that the RF-110 tube amplifiers are just about the same deal for keying and control so wonder what everyone else is using for T/R switching at the systems.

And last but not least anyone done a group buy or have a good source for the power FETs

Ray F/KA3EKH