Aaron Thomas skrev:
> Just had my first chance to try the SDS-800 I picked up at a French
> market the other week...
>
> It's okay, but I don't think it's right.
AS might be expected with that price.
> The bass channel is the least satisfactory. If I turn the overall level
> down to zero, it's fine. Otherwise I get a constant "howling" sort of
> noise. The volume of the howling is governed by the Click Level pot.
> With this turned fully clockwise, the howling is loud - with this pot
> turned fully anti-clockwise, the howling is quiet but still there.
I know the tech's here know more, but a leaking opamp or similar maybe?
> I can still trigger the bass channel despite the howling, but it doesn't
> sound anything like a bass - it sounds quite high pitched, more like a tom.
I think that's just one problem in there, that manifests itself like this.
> The snare seems reasonbly okay although doesn't sound a lot like the
> classic Simmons snare I was expecting. I can't seem to get that sharp
> Kraftwerk-esque sound I want. Sounds more like a tom sound with resonance.
Have you got any noise whatsoever? Otherwise it might be this circuit.
Without noise it's suppose to sound resonant and strange.
> Tom 1 seems absolutely fine - and triggers the run generator nicely.
Great! :)
> Tom 2 is a little strange. The Decay pot doesn't seem to have any impact
> on the length of the sound being produced. It's constantly a short sharp
> sound. In fact this channel seems to produce sounds which sound far more
> like a kick drum than the bass channel does!
Sounds like it's just the decay pot or maybe the circuitry connected to it.
> And finally the output I get from the Headphone socket is a little
> noisy, compared to the individual outs and the stereo / mix outs on the
> back of the box.
As I recall this is a factory flaw. Others might be able to confirm this...
> It's a bit of a shopping list of problems! Bearing in mind I'm a
> complete newbie to this, and have never opened one of these machines up
> before - where would you suggest I start?
I'm no wiz but I'd start with the decay pot. If that gets solved you get
energy to attack the next issue. :)
> Fingers crossed you guys can help - and thank you in advance for all
> advice given.
Otherwise we have a few skilled techs here on the list. If it cannot be
solved via the list it might be worth having it serviced.
Good luck!
--
electronically yours, jesper
- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se
www.myspace.com/machinepop