[sdiy] SSM2220 Sources

[harrybissell at prodigy.net]

How about the MAT-03 from Analog Devices for a good
PNP pair.

Or for a lower cost pair, the 2SA798  (getting a little hard to
find... but only $1.00 or so

The 2SA1349 is another pair (getting hard to find also) that does
not have the emitters tied together (which you might not want)

Most folk like high gain and low R(b-e) for expos.  I'm not experienced
enough to have noticed much difference (so far)

H^) harry

--------Original Message--------  

From: nick at dreamtheater.zzn.com
To: <synth-diy at dropmix.xs4all.nl>
Sent: Feb 6 2003 15:38
Subject: [sdiy] SSM2220 Sources

>Hi,
>Does anyone out there know where I can get some SSM2220s matched PNP
>transistor pairs?  I can't seem to find them here in the USA.  I don't need
>many.  Is anyone willing to sell me two or three?
>What are the parameters that I need to look at for use in exponential
>converters?  Are there any suggestions for substitutes?
>Any assistance would be appreciated.
>Thanks,
>Nick Liebrecht


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