[sdiy] to use or not to use... log conformance PNP pair

[harrybissell]

Yes... a can marked 'log conformance" would be the best choice. This is
matched for log
or antilog (expo) use.

A good cheap tranny is the 2SA798 for expo work.  The Analog Devices
MAT03 would be ideal
in the high-priced spread

H^) harry

Peng wrote:

> I'm ready to slap together the T. Henry VCO1. It calls for a matched
> PNP pair for keytrack(expo). I have a PNP pair in a can but it is
> labelled "Log conformance". I don't know what log conformance means.
> More to the point, will this part work for the expo convertor or am I
> better off using single (but matched) PNP transistors ? Waiting for
> your generous help,Phil
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