SV: RE: RE: [sdiy] Ratio switching!

[karl dalen]

You have to divide down the cermet multiturn to 5ppm
if the resistor strings are made out of 5ppm resistors.
it would be meaningless to have 5ppm resistors an 100ppm pot.

LT1013 i have a couple! :-)

But what value of the string would be best fitted?
Some use 200k others Pro1 use 100k, Roland use 2k and 1k?

Reg
KD

--- John Loffink <jloffink at austin.rr.com> skrev:

> No, accuracy can be fine with a multiturn ceremt trimmer (typical
> temperature coefficient of +/- 100 ppm) and the right buffer, such as the
> LT1013 I recommended.  
> 
> John Loffink
> The Microtonal Synthesis Web Site
> http://www.microtonal-synthesis.com
> The Wavemakers Synthesizer Web Site
> http://www.wavemakers-synth.com
> 
> 
> > 
> > However i assume the pot and the buffer will decrease the string accuracy!
> > :-(
> > Well, at least the pot will,
> > 
> 
> 



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