The natural solution is to do what did with a sparkling new looking GSB-201 owned by local ham K6DNW, and that is to re-build the amplifier, using modern circuits to interface to the ancient ones already in the amplifier. This is dangerous and won't work with any sort of transceiver, let alone modern solid-state ones. Any suggestions for a modification for this amp? The GSB-101 gets its cutoff bias from an external source, and indeed keys the internal relay with 110v AC. What actually keyes the amplifier then, just the rf from the transmitter? Shawn mullins soul's core. The Gonset manual shows the -100 bias for turning off the tubes during receive and a 110VAC line for switching the transmit / receive relay so the receiver gets cut out during transmit. The internal relay switches the transmit and receive relay for use with twins, but isn't this keyed with 110VAC? You will have to forgive my ignorance but I do not know much about amps. The Gonset manual shows the -100 bias for turning off the tubes during receive and a 110VAC line for switching the transmit / receive. I'd definitely get the manuals and schematics. View and Download Gonset GSB-201 instruction manual online.
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