WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Also from Boston. We've talked before at some point. So whats
next??? I can help you out with getting better results with the
metalwork. I'm a whiz at FPE designer.
The amps in the photo use MQ-565s, the Triode Electonics ST-35 power tranny clone. The itself is an Amity clone. I'm using 12AV5's strapped Triode (look like 2A3s), 6AX4 damper rectifiers and 12BH7 as drivers.
The top plates cost $170 to fab a pair (lots of countersunk holes). You can get the Walnut boxes for another $140.
For you next trick, you should do a Triode KT66 or KT88 PP amp.
Try the AV5 as pentodes. put g2 at ~70V. They do well as linestage tubes too. B+ of 200, g2 of 75, 100R cathode R and 750R plate loads....sweet!
cheers,
Douglas
