spud wrote:
I have a blurry, useless, inaccurate paper copy from something called
analogman. If someone has a real copy with component values I'd really
appreciate it if you could contact me at the below address. I think
it's pretty similar to the Electro Harmonics PS-1. Thank you, s.
mrmasondjp
at
yahoo.com

Most schematics available on the web for this or the Mutron III envelope
filter are NOT going to be as easily readable as from something built in
the last couple of years. Got to remember these units were done before
CAD systems were generally available and were hand drawn. Analog Mike is
doing the best he can with what he's got. He's not a 'thing' but a real
person.
What kind of parts are you looking to replace? The op amps are/were
standard Motorola old ones, circa mid 1970's. If you can read the color
codes on the resistors (they were standard carbon resistors), that will
help. I never kept the schematic in my head, but could probably trace it
out if I had the unit in my hands. Oh yeah - don't try and put in a new,
super-duper spec'd op amp - the extended frequency response won't help
any, and may well cause more problems than it'll help.
Spray some contact cleaner into thew pots and controls - that will help
take care of intermittents that way.
How do I know such - used to work for the company when they were in
Rosemont, NJ doing final test and checkout along with repair of customer
returned units. My test equipment (besides DVM and scope)? A Strat and
Twin Reverb.
--
de Jack N2MPU FN20
Modeling the NYC/NYNH&H in HO and CP Rail/D&H in N
Proud NRA Life Member