greetz,
i have here a sds200 drumsynth with a non functioning psu
i've found out it 's the transformer.
for some reason there's never any info written on transformers >:(
is there someone here that worked on one of these ?
in wich case there might be info on the pinout of the psu flatcable..
the sds200 has the same psu as the sds400/800
hope i get it alive again.. next step would be cv in on the pitch then if possible
ok have a nice evening
nochtanz
Ah, now I had one of these on long-term loan, and gave it back. What to do is, figure out what the voltage regulators for the power supply are and that will give you a clue to the voltage. You can work it back from there, so for example if it wants a 15V supply rail you want a 12V transformer, because 12*sqrt(2) = 12*1.4142 = 16.9V, giving enough headroom for the regulator to work.
hey thanks Gordon!
did you like this drumsynth btw?
Yeah, there are some pretty mad noises to be had. The "Second Skin" pot brings in a strange ringmod effect. I had a lot of fun triggering it from a home-made interface and feeding it through a tape delay, which my flatmate described as being like the Smash robots falling into a cave.
i picked up 2 sds9 with 10spare eproms for £60 quid last year dont think the girl i got them from realised what they were, couple of broken pot stems and some random pot knobs, but i just got a set of replacement knobs and they look pretty good now, happy days! The sds 8 is a cracker as well, fat sounds and all analogue, the sds9 is part analogue/part digital.
http://electro-music.com/forum/post-132672.html (http://electro-music.com/forum/post-132672.html) If your after a wicked drum synth, this is a beast i was lucky enough to find one, has a great range of sounds that go way beyond normal drum sounds.
I believe they use Curtis synth voice chips for the analogue bits. The SDS-7 uses a weird big hybrid thing which looks like it would be hell to replace.
Quote from: Gordonjcp on November 04, 2010, 08:31:14 PM
Ah, now I had one of these on long-term loan, and gave it back. What to do is, figure out what the voltage regulators for the power supply are and that will give you a clue to the voltage. You can work it back from there, so for example if it wants a 15V supply rail you want a 12V transformer, because 12*sqrt(2) = 12*1.4142 = 16.9V, giving enough headroom for the regulator to work.
once again: thanks a lot Gordon,
i followed your suggestions, found a new trafo, and it works again :)
i must say that i prefer my coron ds8 soundwise, not that i'm dissapointed,
but i imagine the small decay range will get me bored after a while
and i guess resonance control would have been nice
and cv control over the pitch would have been nice to
but for what it is; nice analog percussion machine :)
On a related note i've just finished a TAMA Techstar TS305
http://www.circuitbenders.co.uk/forum/index.php/topic,1709.0.html (http://www.circuitbenders.co.uk/forum/index.php/topic,1709.0.html)
wicked