Vintage Simmons Drums (UK) Users Group

samzehr@... skrev 2013-12-05 03:31:
> Hi all
>
> I received my SDS9 from eBay with 3 sheared off knobs. Looking through
> the archives, this seems to be a common problem, although I don't see a
> definitive replacement part for the pots or the knobs. I'm missing
> Volume, Lo Tom Volume, and Auto Speed. While I wait for parts, if anyone
> sees something wrong with what I am ordering, please let me know!

I found pots for my SDS-1's a bunch of years ago. I guess they are the 
same. But the most important is that the house is small enough. I guess 
that goes for the SDS-9 too...

> I'd love to keep it looking original, but even if I could find the right
> knobs, I can't find a pot with the same shaft. Perhaps someone on the
> list has a lead on these? I've seen an old message that an Ed Rose might
> know - is he still on the list?

You can find them on Ebay from now and then. I bought some for my EPB 
but I'm not sure I have enough left. The knobs is with 99% certainly 
Cliff Electronics. These are and were common on UK gear in the 70's and 
80's. I've replaced many knobs and most often with Cliff... :)

> I've never worked on this stuff before, but I have worked on some 80's
> arcade game boards, so I'm not surprised to see battery replacement as a
> big priority

If placed in an idiotic place and/or in terrible shape - change. Use 
rechargable or non-rechargable. It's your choice, but do modify the 
circuit if going for non-rechargable. I prefer the later.

> Electrolytic capacitor replacement? I see some mixed opinions. It can do
> wonders in a CRT monitor, but I don't have enough electronics knowledge
> to know which ones are most likely to cause problems. Maybe in the power
> supply? I hate to mess with something that is already working, but
> perhaps I'll replace any that I have equivalents on hand for.

I normally consider this a bad idea. The PSU is the exception. But on 
the other hand, there are plenty of 60's and 70's units still running 
well on old caps.

> That brings me to the next question - schematics. I was hoping to find a
> repository of schematics and/or service manuals - it appears there was
> such a thing, but it was stopped due to abuse. If anyone would be so
> kind to email me a schematic (SDS1 would also be much appreciated), I
> can assure you it will not be sold or redistributed.

I have none for 9, but maybe 1. Will need to check at home.

-- 
electronically yours, jesper

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