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TM3030 - 2SK30A-O
MUFF WIGGLER Forum Index -> Oakley Sound Systems  
Author TM3030 - 2SK30A-O
eljay
Can anyone tell me if I can use a 2SK30A-GR91 for the 2SK30A-O, I already have a couple of these from when I built my SVCOs. I have sourced the 2SK30-Y from ebay.
Synthbuilder
eljay wrote:
Can anyone tell me if I can use a 2SK30A-GR91 for the 2SK30A-O...


Nope. It has a different value of Idss which directly relates to the voltage offset of the voltage follower in the VCO. You want as low an offset as possible and the GR isn't going to give you that.

However, you can try it in the VCO and if you like the sound of the 'squarewave' then go for it. However, the TB303 used the O variant so to get that sound it's either using a O or the J201 which is, in this case a well spec'd O.

Tony
eljay
Thanks for the feedback Tony, I've sourced the 2SK30A-O variant on ebay from the same supplier as the 2SK30-Y.
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