[sdiy] ASM-1 newbie & cap questions

[>>>marjan<<<]

> 1 - vco fet should be 2N4856 or 2N4391 - it'd be good also a BF245 ?


It's nice JFET, it's the only one ever used. Works quite good in VCO
apps, you only need to tweak the reset RC constant

> 2 - i made some errors in my RS order - so now i got polystyrene cap 2200pF
> / 160Vdc !!!
> Is too high as a volt value ? I must swap them to 50 vdc ???

No, but I'm not sure you'll fit such a large cap in there, otherwise
it's not the problem

> 3 - as above , also for lfo/glide big cap I got a big ceramic 1,0uF / 100
> vdc !  better swap ?

no, use some poly ones, esp on glide, but lfo will benefit too (not 
so crucial)

> 4 - that 18pF cap in vco - i can't find that value so i picked a styrene
> 15pF - is still good ?

that's part of RC constant you should tweak, I often need a bit larger
cap, 33p or something. not sure if 15 (or 18p) will work...

> 5 - again that 30pF cap in vcf - i can't find them so i picked a styrene
> 33pF - are still good ?

that's the one in the feedback? not critical at all, you can use 100p
if you want but 33p would be ok

cheers,


-- 



marjan


me    : Marjan Urekar
e-mail: urekar.m at eunet.yu
s-diy : http://surf.to/marjansystems
music : http://go.to/forcemajeure