I want to build a 5F6 Bassman, but I would like to have lower power. Some people suggest using 6V6s instead of the 6L6 tubes.
From what I understand, the main issues would be:
1) the bias - this shouldn't be a problem.
2) dropping B+ voltages, because 6V6 won't survive 5F6 voltages for long. Increasing dropping resistors or maybe additional RC stages? Some people suggest using 5Y3 rectifier tube, which has bigger voltage drop.
3) issue with the output transformer not having the right impedance ratio's, which would also be not healthy for the tubes. But I think this could be resolved by using different impedance speakers.
Correct me if I'm wrong here: 6L6s needs 4000 ohm on the primary, 6V6 about 8000 for a certain output impedance. Then I use a Hammond 1760K which has 2, 4 and 8 Ohm. So I use 4 ohm winding for a 8 ohm speaker, then the impedance on the primary should be around 8000 ohm also.
Anything else to consider?
Btw - check out the tweed amps I made so far. (champ head, champ 8 inch combo, 12 inch speaker cab with Jensen Blackbird, and a Deluxe head ). Exposition in Netherlands. I also made my own cabs.
From what I understand, the main issues would be:
1) the bias - this shouldn't be a problem.
2) dropping B+ voltages, because 6V6 won't survive 5F6 voltages for long. Increasing dropping resistors or maybe additional RC stages? Some people suggest using 5Y3 rectifier tube, which has bigger voltage drop.
3) issue with the output transformer not having the right impedance ratio's, which would also be not healthy for the tubes. But I think this could be resolved by using different impedance speakers.
Correct me if I'm wrong here: 6L6s needs 4000 ohm on the primary, 6V6 about 8000 for a certain output impedance. Then I use a Hammond 1760K which has 2, 4 and 8 Ohm. So I use 4 ohm winding for a 8 ohm speaker, then the impedance on the primary should be around 8000 ohm also.
Anything else to consider?
Btw - check out the tweed amps I made so far. (champ head, champ 8 inch combo, 12 inch speaker cab with Jensen Blackbird, and a Deluxe head ). Exposition in Netherlands. I also made my own cabs.