[sdiy] Using BC847S in exponential converter

[Samppa Tolvanen]

On Fri, Aug 21, 2009 at 11:42 AM, Gerard<translucent at xs4all.nl> wrote:
> Lots of VCO designs are using outdated (well, hard to obtain) matched
> transistor pairs like the LM394 and MAT02 in their exponential converter.
> Has anyone on the list ever tried the BC847S that can be found real cheap
> (I bought 100 of them for 5€ at Conrad) in such an application?
>
> The only reference on the list I could find was this post:
> http://dropmix.xs4all.nl/pipermail/synth-diy/2008-August/008924.html
>
> I'll do some experiments anyway :)
>

These aren't monolith designs, You get a couple of transistor from the
modern process in the same package.

qamppa