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FENDER MONTREUX

Started by jman, August 15, 2019, 09:31:08 PM

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jman

Any one know how to set the bias on this amp? schematics are found under Rivera era amps.

Jazz P Bass

#1
Before adjusting the 'bias' of the output section, I would suggest that you measure where it is set at the moment.

Measure the voltage (in MV's) across either R14 or R15 (the ballast resistors).

There is not a Fender specified bias level on the schematic.

Adjusting P2-B potentiometer will either increase or decrease the current draw of the output section at idle.

Being a Class A/B output I would go for the lowest setting that just gets it out of crossover (Class B) distortion.


jman

Thank you for that info on biasing.