[sdiy] Synthacon VCF transistors

[Brett, Bill]

How critical is the 2n2907 trannie specified in Ken Stone's schematic. Can another part be used here?

thanks
-Bill

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of phillip m gallo
Sent: Friday, March 19, 2004 10:35 AM
To: 'Cynthia Webster'
Cc: synth diy
Subject: RE: [sdiy] Synthacon VCF transistors 


Cynthia, Fred;

It used to be that the 2N2222A had lower Hfe than the 2N2222.  The '2222
became such a popcorn part that the two spec's merged to that of the
2N2222.   The PN2222 looks to adhere to the '2222 spec for Hfe.  So it's
easy to believe depending upon vendor that a '2222 and a '2222A would
perform "somewhat" differently.

Regards,
p
 


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