I'm repairing a (music) keyboard because the 100 KB sliders are shot.
What does the "B" mean? It's a 100 k ohm pot. Does anyone know where I
could buy such a thing? It looks to have a strip of resistant paint
and I was wondering if I could repair mine with the stuff. Does anyone
sell resistive paint? Anyway, I'm going to go google, but I thought
I'd check here first.

rK

rabiticide wrote:

> I'm repairing a (music) keyboard because the 100 KB sliders are shot.
> What does the "B" mean? It's a 100 k ohm pot.

The delightful thing is that if it's a slide fader made in Japan or Asia
generally, B means linear and if it's European, B means 'log' or audio
taper.

Fun isn't it ?

What's its function ?


> Does anyone know where I
> could buy such a thing?

Electronics hobby shop ? Or electronics distributor.


You don't say where you are of course, so I can't suggest a possible but
unfortunately both faders and opts generally are often customised to suit
the manufacturer and exact replacemnents are often very difficult to find.



> It looks to have a strip of resistant paint
> and I was wondering if I could repair mine with the stuff.

No. Forget it. It wouldn't last long anyway.


> Does anyone sell resistive paint?

No. Not in the quantities you need anyway.

Graham

It's a fader on the synthesizer section. There're four octaves 16', 8'
4' and 2' and a white noise generator. The keyboard itself is really
cool; it's all analog so the adjustments are all made with faders,
switches, and turnpots. Inside, ther are 49 clusters of components
corresponding to the 49 keys. Each key has its own sine wave
generator (I guess). You can get pretty cool sounds out of it but you
can't 'save' anything. The closest you can get is a template they give
you in the owner's manual. They tell you to copy it and write in any
interesting timbres that you might want to remember. It is ca. 1980.

I live in Felton, CA. I was thinking: instead of resistant paint, is
there something like a blank PCB but with resistant instead of
conductant? I could etch it and cut it myself then. In the mean time,
I'm looking for linear slide pots that will fit. I think I'm going to
have to build it myself though...

rK

If its audio, it has 10% resistance at 50% travel, so set it in the
middle and measure from the wiper to both ends. I'll assume one half
wont work... If the other half reads 50K, its linear. If it reads 10K
or 90K, it audio.

On Sat, 15 Mar 2008 13:02:47 -0700 (PDT), rabiticide
<rabiticide@gmail.com> wrote:

>It's a fader on the synthesizer section. There're four octaves 16', 8'
>4' and 2' and a white noise generator. The keyboard itself is really
>cool; it's all analog so the adjustments are all made with faders,
>switches, and turnpots. Inside, ther are 49 clusters of components
>corresponding to the 49 keys. Each key has its own sine wave
>generator (I guess). You can get pretty cool sounds out of it but you
>can't 'save' anything. The closest you can get is a template they give
>you in the owner's manual. They tell you to copy it and write in any
>interesting timbres that you might want to remember. It is ca. 1980.
>
>I live in Felton, CA. I was thinking: instead of resistant paint, is
>there something like a blank PCB but with resistant instead of
>conductant? I could etch it and cut it myself then. In the mean time,
>I'm looking for linear slide pots that will fit. I think I'm going to
>have to build it myself though...


Just out of curiosity, what is the make and model?

Best regards,


Bob Masta

DAQARTA v3.50
Data AcQuisition And Real-Time Analysis
http://www.daqarta.com
Scope, Spectrum, Spectrogram, FREE Signal Generator
Science with your sound card!

Make and model of the fader or the synthesizer? (I'm betting on a
polymoog?)