MXR m-134 stereo chorus vintage question.

Started by spiderman2812, January 13, 2008, 06:50:28 PM

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spiderman2812

Does any one have a diagram or parts list on the original. I've found one online but it's so blurry you can't read anything. My buddy gave me one to revamp now I think we're going to clone it. The biggest problem is the trannies. Only one is marked but they all do look the same. I also found a place where I can buy the diagram online then download it but I'm scared it'll be the blurry one. Can anybody help me out?? Thanks

theehman

According to my schematic (which is not blurry at all) Q2 is a 2N4126 and the rest are ZTX109C.

Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs

spiderman2812

Thanks. All the schematics I've found online are like a picture of the original and when you zoom in it gets real blurry. Thanks for the help.

spiderman2812

Do you know if the ztx109cs are still available or of a good replacement? NTE didn't have a cross reference on them. Thanks

theehman

Quote from: spiderman2812 on January 13, 2008, 08:02:53 PM
Do you know if the ztx109cs are still available or of a good replacement? NTE didn't have a cross reference on them. Thanks

Maybe it's a variant of BC109C?
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs

StephenGiles

"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

dbell76

Can you please measure voltages on the big RETICON chip? I think that mine is faulty :icon_sad: