1m pot instead of 5m???

[hank reynolds 3rd]

i found an old AD schem (klein envelope??) and it calls for 5m pots....could i get away with using 1m as only 2 of the lugs are used....(saw an AR gen on rays synth site that uses 1m ,and is built similar)...
cheers in advance
sam

[Paul Perry (Frostwave)]

The only problem is, the decay may not go as slow as you want.
Maybe you can bodge it wiht a bigger capacitor. What page is it on?

[petemoore]

You could switch in resistors added to the lugs of the pot to get two [or more] different ranges of resistance that the pot could fine tune [within its 1m range]

[hank reynolds 3rd]

thanks for the tips....
the i got the schem ages ago (and its not on this computer) but its labelled 'klein envelope'....it uses a 4001 and dual opamp....
i've seen a similar one on rays synth page
http://atlas.csd.net/~rjwsoft/synthesizer.html

but this is ar (i read somewhere that ad is better if its for a vcf)...
it uses a 40106 and 4013

cheers
sam

[Mark Hammer]

There are scads of cheap, simple, flexible envelope generator schems posted around, the majority of which use a 1M pot for the attack, decay and release parameters, and a 10k for the sustain parameter.  Barry Klein's book is a classic and there is lots of good stuff in it, but don't feel constrained to that schematic when there are so many to choose from and the pot values present a hardship.