The Amp Garage

I'm a tech / player. owned a 65 vibrolux.date code OJ. exactly like yours. let it get away from me-money problems.when i got it years ago the power tranny had been smoked. the owner put in a super reverb tranny.he never could make it work.i had to rebuild the voltage divider to accommodate the highe...

thanks for the attention.Almost as soon as I posted I solved it.open plate resistor on plate-pin6 of driver tube
.no b+

1993 60 watt fender concert tube amp. o-scope image is normal and symmetrical through all stages until output of phase inverter when it look like 2nd order harmonics.see pic. anyone see this before or have an opinion.maybe negative feedback loop gone awry? Tubes have been replaced.all DC voltages in...