Yahoo Groups archive

Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Message

Re: ARP Quadra distortion on strings help (ARP Omni ciruitry)

2014-10-23 by nchevatarevich@...

Thank you all, and sorry for the delay in the thanks. I've been offline for a bit. I do have a 'scope. The key contacts should be fine as the lead section is working OK.

I had some other suggestions that the problems could be the transistor arrays as well. I think both chips are available NOS. It may take me a while to get this on the bench (there is some construction going on at the house) but I will report back. As an aside, I had looked in to seeing if I could 'black box' replace the boards with Omni boards, the schematics look very similar but the board part numbers are different and the layout is slightly different.

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.