Michailoff amp #2, Lead Master

[turbofeedus]

Alex Michailoff was a small builder out of Allentown, PA.
He passed in 2008, RIP.
I have another one of his amps, thread here.
I might be the premiere Michailoff amp collector .

Anyway, some interesting tone shaping options here.
Also, very interesting to me rectifier setup, half tube, half solid state.
Let me know what y'all think.
P.S. If anyone has a tube amp transformer library for Eagle, please god help.
More pics here.

michailoff_LM-9.JPG

michailoff_LM-1.JPG

[thetragichero]

you're right that is an interesting rectifier setup
is that really a 100k resistor on the input or a missing zero (1M)?

[turbofeedus]

you're right that is an interesting rectifier setup
is that really a 100k resistor on the input or a missing zero (1M)?

I'll double check, I might have read it wrong. Good eye.

EDIT: Yup, they're 1M. Thank you!

[turbofeedus]

I found another of the exact same amp at a different GC in the area, for $300 less mind you, so I picked it up.
This one has some zener diodes on the secondary of the reverb transformer, in an alternated parallel pattern.

zener.jpg

What is the function of this? Won't this just clamp the voltage down to +-Vf for the zeners?
They're 1N4747A, a 1.3W 20V zener.

[turbofeedus]

I pulled out those zeners, no perceivable difference ¯\_(ツ)_/¯
Here is the schematic for the amp as it sits:

schem2.pdf