[sdiy] Tempco group buy news

[Peter Grenader]

Use the tempco at the shunt, not the feedback resistor.  Many more  workable
value combinations.


James Patchell wrote:

> 1K may be stocked...but.... Attenuate by 1.87K/100K and you get 1 volt per
> octave (or very close)...2K/100K you get a bit more than 1V/octave...for
> synth work...2K is probably the most convenient...however...by changing
> circuits, almost any value can be made to work.  When I ordered my Q81Ks 30
> years ago...I got 2Ks as this made the most sense to me then (lucky
> guess...eh?).....
> 
> At 08:53 AM 5/30/2005 +1000, Ken Stone wrote:
>> 1k is better simply because it is stocked. I contacted the local distributer
>> in Australia for some a year or two back. 1k was in stock, as it appears to
>> be an "industry standard". Everything else had to be ordered.
>> 
>> Ken
>> 
>>> Most of the older VCOs I have seen use 2k tempcos, though some specify
>>> 1k. Almost all of the more recent circuits I have seen specify 1k. I
>>> had no idea why! Of course it figures that people design circuits
>>> around the components which they have available. The ARP 2500 VCOs used
>>> 100 ohm tempcos, and the later ARP VCOs used 1.87k! What makes 1k or 2k
>>> better?
>>> 
>>> KRL-Bantry told me that they are happy to make any almost any value,
>>> but that some would be more work, and thus be more costly. Tomorrow I
>>> will ask them about price and lead time for 2k tempcos, so if people
>>> are interested in these also, please do let me know! I am
>>> guessing/hoping that 2k will be about the same price.
>>> 
>>> CJ
>>> 
>>> 
>>> 
>>> __________________________________
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>> _______________________________________________________________________
>> Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
>> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
>> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
> 
> -Jim
> ***************************************************************
> http://www.oldcrows.net/~patchell
> 
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> 
>