hi, JH project and the JH triple chorus pcb of course, too, still possible to buy here: http://randomsource.net/haible/vintage ps. In the Triple Chorus i Made some mods and used the MN3007 chips instead of the original TDA1022 BBD's, without any changes in values of another components set. With a li...

Hi, You need a some Ribbon controller for connecting from a soft pot or a pressure ribbon, I think. As possible example for it : https://www.gearnews.com/ribbon-controller-stroking-eurorack-synthrotek/ . There are a lot of DiY ribbon controllers schematics on the net, too. From Ian Fritz, from the E...

Hi,
The Cz 101 schematics from the service manual shows a Contrast variable resistor VR3 10K. Saw it some where on the pcb near the 14 - pin LCD socket.

Hi,
It's 5VDC signal relay relay, I think.

hi,
may be i am wrong, but
how good are visually look battery contact places in the battery compartment
how clear are pcb's from residue from old batteries

Hi, Thanks gmeredith, Tested a 64-patch CZ RAM cartridge schematic with a one RAM chip HY6264. Only exception is inverted signal necessity from cartridge slot 6 pin as CS2 inverted as it goes in this schematic to IC2 pin 26. The schematic is like to EZ-CZ cartridge schematic for 4x16 patches, I thou...