Gi-7b's for 6 meters
Some time ago got the hots to run more power on 6 meters. Initially I thought about running a pair of 4CX250B's, and actually started the project. Progress lagged as I began to think about providing screen and bias voltage. I remembered that K5QE had suggested using Russian tubes and investigated that possibility. It soon became apparent that this was the way to go. I have plenty of drive from the FT-920, and the 2 KV at 1 amp from my power supply is a nice match to Gi-7b's. I abandoned the pair of 4CX250B's for the GI-7b's and was off and running. The project is still in progress, but I will post here the ongoing results of the project. Below are some pictures showing the initial efforts on the amplifier.