yes, 6g16 vibroverb - but with 4 x 6V6 with bias vary trem. & reverb - sort of a cross between PR and a AB763 "insert_model_name_here", only i'd like to lose the normal channel and leave the summing amp for added gain. am not opposed to cathode vary trem, but paraphase PI has not done much for me tone wise, however, i must admit that i have never heard a 5E9-A.
i do prefer long-tail or properly designed split load. if we build with LTPI (AB763) we'll likely need to tame the drive - 6V6 need about 2/3 of 6L6 drive. the NFB loop will need tweaking as well.
i attached a hacked schematic - i was thinking something along those lines. let's see what you have? ;)
sorry but i don't have autocad, so i can't edit .dwg files native - all i have is visio (software poverty), however, i can import, edit, then save as dwg.
the chassis is up in the air, what we each do is likely to be different - my friend would like a conventional looking head (tubes upright - like marshall), however, the layout we can share - the turret board won't be significantly different.
sorry but i can't help in the speaker advice department - i've limited exposure to makes and types. i have had some positive results with JBL, eminence, and a few webers, but none with the reaper 55HZ you mention. again, my friend wants a head so he can mix it up with any speaker he chooses to.
in the past i have experimented with 6V6 in P-P parallel with mixed results - they like to break off into oscillation. perhaps grid stoppers and plate stoppers may help in that department. another note of interest is that on some older amps that use 6V6 and 6L6 in P-P parallel, i've noticed that they used a coupling inductor from plate to plate of each tube on each phase side - i presume that is to help prevent RF oscillation - they are fairly easy to build; +/- 20 turns of 20 AWG (sorry, we'll need to convert to mm) enameled magnet wire wrapped around ~6mm (1/4") form.
PM sent.
regards,
--DL
Topic: AB763 with 4x6V6 (Read 4723 times)