Glad it all worked out!

Just came across this thread -- congratulations! I've had my SP-12 since purchasing it new in 1987 and will never part with it. In case you haven't already figured out, you do almost certainly have the Turbo model. Or at least, you have the RAM chips for it -- whether it actually runs in Turbo mode ...

micahjonhughes wrote:I think production of the upgrade is ending soon. So order quickly. However, I don't see that stated on the webpage any longer.

Webpage now says at the end of 2018.

madtheory wrote:Why am I only seeing pure black in each of the images?

Same here, even clicking on the images results in an expanded window containing just black. Hm.

garranimal wrote:To check, unplug synth, set your DVM to continuity test and probe the tabs and rail. There should be NO beep, resistance reading should be zero.

I presume you meant to say infinite (i.e. no continuity), not zero.

Hello, This synth is designed for 100 volts AC (as indicated on the spec plate in your photo). The converter you linked to in the first posting steps down to 110-120 volts, which is at least 10% and as much as 20% over what the synth is spec'd for. That extra 10-20% can make a difference! If you can...

I think the comparison is apt. Back when I was a teenager in high school, my physics teacher had one of these units, the Heathkit unit pictured second in the list. We used it to simulate the path of a cannonball fired through the air, displayed on an oscilloscope (some analog computers even included...

For me, the only criterion as to whether a synth is "old" and I would perhaps feel "weird" playing it, is that it's become unreliable/unstable and critical parts are no longer available to keep it in proper working order. Otherwise, every synth is a particular moment in time, captured in physical ha...

It has no fan and is silent during operation. Mine doesn't seem to produce much heat; it has ventilation slots on the top/sides of its rack case. I've had it mounted in between two other rack modules and didn't have any problems, but it's never a bad idea to leave one rack space between your units f...

All good points. Cheers!

would it be safe to place some type of foil or plastic cover underneath the battery just in case it went.. Often it's not just leakage onto the circuit board that causes damage; these batteries also tend to emit a corrosive vapor at the same time they leak, damaging board traces and other component...

I'd never heard of Gesaffelstein before today, but I'm glad I did. Great, great music! Yeah that was a nice addition. I'm not normally a big fan of videos either but that one was really interesting. I liked the shot where they start out with the closeup of the model and then just keep zooming back,...

There seems to be a little bit of hysteria over the Omni PSU which frankly is no worse than most other inexpensive linear series-transistor designs. Hm, not meaning to convey "hysteria" :? However... I guess I see the issues with the Omni/2 as being a convergence of two (actually three, if you coun...

How stable are the VCOs in the Xpander and Matrix-12? In my experience, quite stable and among the best of this vintage of units. Oberheim used a nice technique where the voice board computer measures the tracking error on each of the VCO chips individually at several points over the range of the V...