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NEWB needs help with an Electro Harmonix Freedom Brothers Amp.

Started by rikhi, November 19, 2011, 01:22:16 AM

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rikhi

Hi, I'm Rikhi, and a total newb, both to this site and stomp/ amp repair.
I managed to score an EHX Freedom Brothers (see pic below). I have a proper tech working on it while I watch, but it seems we need a schematic!!! These are superduper rare and I've emailed EHX and everyone else. I do hope I'm posting in the correct forum (my apologies if not). And I'd appreciate any help that might be thrown my way.

Yeh I'm a keen one for the solid state amp.
Love Pignose 30/60, love Coronets, love music.....

Great to be here.

rikhi

Sorry I need a smaller photo- i didn't heed attachment size... will get back with this....

J M Fahey

Waiting for your pictures.
Set your camera to take, say, 1024x768 or 1280x1024 sized pictures, (or numbers close to those), not larger, because we are not printing 24"x36" copies here, just watching on computer screens, and much larger gets lost ... and needlessly "heavy".
Try to get well illuminated and sharp focus pictures, so we can read parts numbers.
Not the tiny print but the color bands.


rikhi

Sorry for the late reply! I was really lucky. EHX sent me a schematics (they're really pretty cool).... so it's all off at my tech's place, while we're waiting for old rare transistors....

What I plan to do is photograph it quite heavily and post the results once it's done.....

It's a pretty small circuit. It'd fit into something the size of a Big Muff Pedal enclosure and make a great retro version of the 22 Calibre....! Altho for that I'd prolly use somewhat more standard parts....

Gonna be exciting!

J M Fahey

QuoteEHX sent me a schematics (they're really pretty cool)....
Goooddd !! :tu:
Whenever possible please try to scan them and post them here to calm our curiosity.
Or, if they sent you a .pdf or .jpg or some other graphics file, just post it as you received it.
Thanks in advance.
PS: and donĀ“t forget your own pictures.

eveready9v

I know this thread has been dead for a number of years, but in case anyone involved with it is still around, I'm looking for board pics of a freedom brothers amp.  I've got one that's in a state of disrepair from someone who tried to do some work on it and only made it more confusing. Anyway, can seem to find so little about this amp on line so following any threads no matter how thin.
Barry

J M Fahey

Is it the Electro Harmonix Freedom amp?
There are a couple gut pictures floating around.

Never heard of Freedom "Brothers" though.

Post a picture or two for identification.

g1

There are some pictures and a gut shot here:  http://inspireformation.blogspot.com/2012/08/electro-harmonix-freedom-brothers-photos.html

I can't say whether the schematic is the same as the Mike Mathews Freedom amp.

J M Fahey

hanks G1  :) , just checked the pictures.
Sadly it is very different from the plain "Freedom" one, which was powered by 60VDC supply, either from 40 1.5V AA batteries :o or a simple 60V DC mains supply and pushes about 25W RMS into a 12" speaker, a Celestion Greenback in he original one  :o 

While this one is tiny, drives two 5" speakers and is fed from a (presumed) 12V battery.

Think Pignose on steroids or similar, probably 5W RMS at best.
Notice power transistors do not even use heatsinks.

Post a couple front and back closeup pictures where components can be read, for some insight on it.

Market value is nil, typical pawnshop/garage sale/Salvation Army stuff.

Absolute worst case you can gut it , mount a generic 12V chipamp inside , say a TPA3110 based board available from Alibaba and others, and build a 3 knob distortion pedal, say a Tube Screamer or similar as a preamp.

Will probably need a fresh 12V battery, current one must be dry/dead.