Vintage Synth Repair

Totally awesome!
Not only your collection of keyboards (mine range from the early 70's with my ARP 2500 to the early 90's), but that you're living in/on one of my all-time favorite places in the world!
(I'm presently exploring moving to the Seattle area in the next few months, so maybe I'll have to take a ferry over sometime and pay you a visit.)
In harmony,
---Kevin

--- In vintagesynthrepair@yahoogroups.com, Jim Blair <ceratos@...> wrote:
>
> Hey thanks Dave.
> 
> And yes, I do live on Vancouver Island.
> 
> I operate a small recording studio that specializes in vintage keyboards.
> 
> http://www.facebook.com/ApeIslandSound
> 
> Are you in the area?
> 
> 
> Jim
> 
> 
> 
> At 11:27 AM 12/17/2012, you wrote:
> >
> >
> >Since all the other keys work, I would suspect 
> >the problem is the key it's self.
> >Does the ProDGX use a resistor or diode keyboard?
> >Either way, check for a bad resistor/diode on 
> >the suspect key, also look for cracked solder 
> >joints, or possibly a short to the gate or after-touch buss.
> >
> >On a side note, do you live on Vancouver Island?
> >
> >Dave
> >
> >--- In 
> ><mailto:vintagesynthrepair%40yahoogroups.com>vintagesynthrepair@yahoogroups.com, 
> >Jim Blair <ceratos@> wrote:
> > >
> > > Thanks for your reply, DT.
> > >
> > > No sample and hold on the ProDGX.
> > >
> > > The note does not stay at the correct frequency
> > > when held. The pitch drop happens immediately on "note on".
> > >
> > > J wires are aligned, and cleaned, as is the bar.
> > >
> > >
> > > Jim
> > >
> > >
> > > At 05:34 AM 12/17/2012, you wrote:
> > > >
> > > >
> > > >Hi Jim,
> > > >
> > > >The fact that the rest of the keyboard works
> > > >fine seems to rule out that the sample hold
> > > >function is awry. Does the note stay at the
> > > >correct frequency if you hold it down? Is it
> > > >only pitch dropping on the release? Have you
> > > >checked to make sure the Jwires are aligned
> > > >properly on that key? Maybe open it up and check
> > > >to ensure that the contact wires on that top key
> > > >are aligned the same way as for all the others.
> > > >If not, bend them back carefully to match the others.
> > > >
> > > >(but I'm not really a tech, so don't just listen to me).
> > > >
> > > >best DT
> > > >
> > > >--- In
> > > ><mailto:vintagesynthrepair%40yahoogroups.com> 
> > <mailto:vintagesynthrepair%40yahoogroups.com>vintagesynthrepair@yahoogroups.com, 
> >
> > > >Jim Blair <ceratos@> wrote:
> > > > >
> > > > > Hello!
> > > > >
> > > > > Here's an odd one up for discussion. I have a Arp ProDGX. Everything
> > > > > works fine....except.....if I hit the top key (highest note) it
> > > > > briefly plays the note, then very quickly drops down to a much lower
> > > > > note (almost instantaneously). After this little event, every key
> > > > > stops working, other than a click for each note.
> > > > >
> > > > > This happens on every patch.
> > > > >
> > > > > Then, if I turn the power off, then back on, everything is fine again
> > > > > until the next time I hit that highest note.
> > > > >
> > > > > Any suggestions on where to point my screwdriver and multimeter?
> > > > >
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Jim Blair
> > > > > Ape Island Sound
> > > > >
> > > > 
> > <<http://www.facebook.com/ApeIslandSound>http://www.facebook.com/ApeIslandSound>http://www.facebook.com/ApeIslandSound
> > > > >
> > > >
> > > >
> > > >
> > > >No virus found in this message.
> > > >Checked by AVG - <<http://www.avg.com>http://www.avg.com>www.avg.com
> > > >Version: 10.0.1424 / Virus Database: 2433/5087 - Release Date: 06/22/12
> > > >Internal Virus Database is out of date.
> > >
> >
> >
> >
> >No virus found in this message.
> >Checked by AVG - <http://www.avg.com>www.avg.com
> >Version: 10.0.1424 / Virus Database: 2433/5087 - Release Date: 06/22/12
> >Internal Virus Database is out of date.
>