[sdiy] transistor substitution question

Robert Roesler bobo at decapod.net
Sun Oct 24 23:10:39 CEST 2004


Thanks a lot for the help, Rene; I see a mouser order in my near future.

I don't mail the list very often, but I monitor it all the time. It's great
that people are so eager to help a neophyte through their projects.

Great list, thanks!

continually indebted,
Bob


On 10/24/04 12:45 PM, "René Schmitz" <uzs159 at uni-bonn.de> wrote:

> Hi Robert and List,
> 
> Robert Roesler wrote:
>> Hi all,
>> 
>> I'm building Rene Schmitz' VCA2, and I was wondering if there's any reason
>> *not* to substitute the bc550's with bc548's. I have 548's, and they seem to
>> work as well as the 550's (I only have a couple of the 550's, and I'm making
>> several VCAs).
>> 
>> ANy help and handholding is appreciated.
> 
> Well, I chose the 550s because they are the lower noise version of the
> 548. So that means the circuit will work with the 548 as well. Only that
> the noise will be somewhat higher.
> 
> Cheers,
>   René






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