-----Original Message-----
From: Tom Moravansky [mailto:
tmoravan@...]
Sent: Wednesday, September 01, 1999 12:30 PM
To:
marleynbobi@...Cc:
analogue@...Subject: Re: [AH] Jupiter-4 tuning problems.
>
> Hiya all of you who have sometime tuned a jp4 "the way it should be done"
> eg. the Service Manual way. Well, hiya all the rest also. Got a problem:
>
> I'm tuning my JP-4 at my school, and got to point 5. on the manual, which
> would be the VCO tune&width part. I got the tuning right on all voices,
but
> didn't get the width right on the last voice (in poly-2 mode). The trimmer
> just didn't turn enough. I tried all sorts of funky stuff, re-adjusting
the
> tune-trimmer, going down one octave, portamento switch, but just didn't
get
> it right. Any thoughts?
>
If none of the components have gone bad, usually you can adjust
both the VCO frequency trimmer and the width trimmer to get a
good range out of both units. The VCO frequency and width trimpots
interact with each other.
Also - remember the trimpots on the back of the unit. You might
have to adjust that trim pot as well to get everything within range.
--
___________________________________________________________
Tom Moravansky
tmoravan@...