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Ok folks pulling my hair out on this one. I have several sets of brownings. I finally found a 4a. I had expanded my regular 4 some years ago with an experimental chip. Does anyone know the best way to expand transmit on this rig? I have a 5mghz vfo but im not sure if the pll output would...

I need help on a 12 tube phantom. The tubes check good. We have found some socket ground issues and have been going through it. We are only seeing about 700w out of it and the tubes test very strong. It is a 4 driving 8 configuration. My question is how much output power should these amps...

I recently acquired this amp and am facinated by it. I need some help though. Can someone tell me the history of how this amp fits in with the other kenrich models. It has a drive level on the front which points to a grid driven situation but the finals are grounded grid. I have never seen...

Does anyone know of a mod to clean up the humm (sounds like AC). I have two of these amps. One has the new HV power supply board and the other has an old board. Both amps do very well. I have new tubes in one and the other has full output however there is a low level hum. Any suggestions.