Tube Amp Archive

Im "ivestigating" the possibilities of using an Hammond 1750L och 1760L output trafo in the 5F6-A circuit. The reason is that i want to be able to use a 4 ohm cab with it. But the 1750L and the 1760L is 4200ohm primary. It seems that the 5F6-A wants a 4000ohm OT. Would it cause me problems using the...

Thanks for the tip! I did a quick search, and found some threads about it! I checked you attached schematic, and it seems to be exactly what im looking for! But the bias-circuit isnt there. Is it possible to just use the original ab763 bias circuit? And where does "A" go on your PDF? Is any schemati...

To sum it up, im planning to build a single channel fender-based 40-50W tube amp.
The cab will be my parallel-wired 1960AX-cab. Wired for 4ohms.

You need to highlight your bias supply capacitor. It is part of the half wave rectifier for the bias supply. You can delete the highlight on the vibrato section and just use a 1.5K resistor and a 25/25 bypass capacitor where connector "A" is, since you probably won't have the preamp tube anyway for...

Hi, im new here and this seems to be a nice forum! I have a question about the Fender AB763-circuit. Assume that i would build a Super Reverb based on the AB763 and want to exclude the Vibrato-channel, the vibrato-circuit and the reverb-circuit. Meaning that i only want to build the Normal-channel s...