Yahoo Groups archive

Vintage Synth Repair

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

Message

Re: [vintagesynthrepair] Prophet 600 out of tune?

2002-03-31 by Bill Fox

-----Original Message-----
From: Brian Andrew Marek <bmarek@...>

>Okay, so I got the Prophet 600 working (changed out the Z-80 - easy!),
>but now I'm finding another problem.  Apparently one or more of the
>oscillators are out of tune, even after doing the auto-tune thingie on
>the board.  What could be causing this, and how would one remedy it?

Perhaps the capacitors associated with an oscillator's pitch have gone bad.
Replace 'em on one oscillator and see if that helps.

Cheers,

Bill        billfox@...           http://wdiyfm.org/programs/emusic
===============================================================================
Host of EMUSIC, an electronic, ambient, and space music show.  Thursdays at
11 pm on WDIY 88.1 FM, Allentown and Bethlehem and 93.9 FM in Easton and
Phillipsburg.  Email me if you wish to submit music for airplay consideration.
Radio Station Home Page: http://wdiyfm.org
Personal site: http://www.users.fast.net/~billfox
To subscribe to the EMUSIC on WDIY list, go to
http://groups.yahoo.com/group/emusic-wdiy and click on [Join This Group!]
SOUNDSCAPES Concert Series: http://www.tadream.net/soundscapes

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.