[sdiy] 3300ppm or 3600ppm?

[pata at ieee.org]

And I have them much (*smile*)
If you want, please contact me off-list.

Taku

Paul Schreiber wrote:
> +3300 is what you want.
> 
> Paul S.
> 
> ----- Original Message ----- From: "George Hearn" 
> <georgehearn at btinternet.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, September 10, 2008 4:22 PM
> Subject: [sdiy] 3300ppm or 3600ppm?
> 
> 
>> Which resistor is best to compensate for the temperature drift in the
>> exponential converter's typically used in VCO's or VCF's like the 
>> ASM1-VCO
>> R14 (http://home.swipnet.se/cfmd/synths/friends/stopp/asm1vco-1.1.pdf) or
>> for the SSM2040 4-pole VCF (Figure 9 on datasheet).  3300ppm/C and 
>> 3600ppm/C
>> seem to get used interchangeably.  Surely 1 is correct to use in these
>> scenarios.  I see the "Tel Labs Q81" come up in lots of schematics,  is
>> 3600ppm/C used in these schematics because that's just what the TC of 
>> a Q81
>> was and is 3300ppm/C then ideal?  George
>>
> 
-- 
===================================================
KATAYAMA, Takuya
Muse Music Synthesizer Laboratory, TOKYO