I finally got a genuine 2sc1266 driver for the Emperor..replaced the 330ohm and the 47ohm that is parrelel with the driver choke..
the 477 is not soldered on yet..
I removed the bias bridge, adjusted the driver bias pot to 50mA, and it stays steady..put back the bridge.
At SSB mode no modulation, base is 0.75v, collector is 11.75v, emitter is 0 v..
But at AM and FM mode, the collector overloads to, check this Im not joking..it reads almost 850v!
My MM screams OVERLOAD, then shows that..
How is that possible? I did the same measurement on a working 2510 and AM/FM is 12v TX..
the 477 is not soldered on yet..
I removed the bias bridge, adjusted the driver bias pot to 50mA, and it stays steady..put back the bridge.
At SSB mode no modulation, base is 0.75v, collector is 11.75v, emitter is 0 v..
But at AM and FM mode, the collector overloads to, check this Im not joking..it reads almost 850v!
My MM screams OVERLOAD, then shows that..
How is that possible? I did the same measurement on a working 2510 and AM/FM is 12v TX..