Audio Electronic Circuit Schematics

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WhiteWarlock
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Re: Audio Electronic Circuit Schematics

Post by WhiteWarlock » Fri Jul 27, 2018 7:10 am

EFM Electronics For Music ARCHIVES
EFM Synthesizers was located in Houston, Texas USA. EFM had been on the web since 1996 selling boards and kits to the DIY synthesizer community. The site includes schematics for ARP, Moog, Oberheim, Korg, and EMS-type voltage controlled filters, oscillators, amplifiers, and everything else you might need to build a modular synth. This an archive keeping Tom Gamble's EFM work evolving. EFM Users is for people that use electronics for making music. Synthesizers, computers, software, midi keyboards, midi modules, DIY electronics, guitar amps, stompboxes, transistor radios….ect are all legitimate topics. EFM projects are for experienced DIY builders, because project often require mods to the PCBs, and documentation assumes a high level of electronics experience.

http://www.n01ze.com/synthwizards/EFM1.htm











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timdrage
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Re: Audio Electronic Circuit Schematics

Post by timdrage » Thu Oct 04, 2018 3:59 am

Ah nice, i have one of those, differently branded tho. Bought it for £1 in completely smashed up condition; I had to splice a new tape loop and the tape mechanism barely functioned, and has completely died last time i tried. The electronics work fine tho, so I need to get round to just frankensteining a walkman to the top of it i think.

thanks for this :)

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WhiteWarlock
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Re: Audio Electronic Circuit Schematics

Post by WhiteWarlock » Sat Oct 06, 2018 4:45 pm

Image
Image
is the motor working?
check your belt... you can use rubber bands in a pinch
the univox ec80 uses mini 8 track tapes
do you have the regular sized 8 track tape delay?
that design was produced under multiple brand names in japan
have obscure one that is the "MTI echo machine"
came up with tricks for getting them working
Image

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