[sdiy] transistor substitution?

[tomg@efm]

It's not a big list, so far everything I've tried works
with these substitutions and from this list most special
function devices can be built.

small npn - 2N3904
small pnp - 2N3906
med npn - TIP29
med pnp - TIP30
large npn - 2N3055
large pnp - 2N2955
npn-pair - 2SC1583
pnp-pair - 2SA978
n-fet - 2N3819
p-fet - 2N5461
high speed n-fet switch - J112 (2N4392)
signal diode - 1N4148 (1N914)
single opamps - TL071 ( sometimes a LM741)
duals - TLO72 ( sometimes a LM1458)
quads - TL074  ( sometimes a LM324 )

The 123 is a small gp npn - 3904

Tom


> This is such a recurring question...  And although
> I have no answer for this directly, I think it
> begs a better solution than for people to keep
> having to dig around for the answers.
>
> I have several megs of free webspace.  I would be
> happy to put up a simple page which lists parts
> and subs.  If any of you have the time, please
> send me (privately) parts substitution info and
> I'll put it up.  This will be a SIMPLE type
> of page with a line item for each part with
> it's cross reference to suitable subs.  The
> site I will use has no banner ads or popup
> windows.
>
> I also think that we REALLY need an FAQ, but that's
> another issue.
>
> If there is no interest in doing this, I'll know by
> the lack of emails about it.
>
> "Thom Somneevich" <thom_s4 at hotmail.com> wrote:
> >Hello all,
> >I'm gathering the parts for the EMS filter; does anyone know of a
substitute
> >for the bc109c transistor other than the nte123a (which is what Mouser
calls
> >up when I search for the former)? The nte123 is $1.50 a pop, which I'll
pony
> >up if I have to, but... you understand.
> >Thanks,
> >thom
> >_________________________________________________________________
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> >
>
> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
> -- Linux Rex         | RedWebMail by RedStarWare
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>
>