"The Electronics For Music EFM VCF6c is a very distinct sounding filter. It will self oscillate nicely at higher resonace settings. Changing C9 to 100 uF (or more) will extend the lower range.It's a good idea to match all of the diodes for same forward voltage drop. I also matched Q1 and Q2 for hfe. In both cases take pains to make sure they are all at the same temperature! Let them sit in a thermally stable environment (away from drafts, windows, heat/AC registers, etc) for a while beforehand, and only handle them with tweezers or pliers. Don't hold the tweezers in your hand for long, either."
You can find more info including the schematics here.
No comments:
Post a Comment
To reduce spam, comments for posts older than one week are not displayed until approved, usually same day. Do not insult people. For items for sale, do not ask if it is still available. Check the auction link and search for the item. Auctions are from various sellers and expire over time. Posts remain for the pics and historical purposes. This site is meant to be a daily snapshot of some of what was out there in the world of synths.