[sdiy] The future of synth DIY

[patchell]

    Actually Harry, it has already been done....

        For details go to http://www.silcom.com/~patchell/parts/parts.html

        I also have THAT120's and THAT140's.


harry wrote:

> I'm kind of pleased with the MAT-04.  Maybe if enough prople wanted
> a group buy we could get a good price out of Analog Devices. The Hfe
> is in the 400 range, 14 pin DIP, etc...
>
> Hey Martin: Are the protection diodes a problem IYHO ???
>
> H^) harry
>
> Martin Czech wrote:
>
> > :::Even the 3046 would be very useful if someone would make it with better
> > :::specs.  Hfe = 40 might have been Ok back in the '70s, but not today.  IC
> > :::fabrication has advanced a lot in 30 years, why can't someone put 4 or 5
> > :::transistors in a 14 pin dip with Hfe around 400 - 500, low Rbe, etc.
> > :::
> >
> > Some of the applications of the 3046 are cheap switching, or cheap
> > analog, you don't care then.
> > OTOH more hfe means shallower base, this means loss of robustness.
> > May be that's the reason.
> >
> > MAT02 and the like have special protection devices.
> >
> > :::Maybe we can get together as a group, and have a semiconductor fab house
> > :::make some for us, with the specs we need.
> >
> > As long as we can get japanes duals...
> > I bought a couple of them.
> > Perhaps we should simply buy a large stock of these
> > items, the price/usage ratio will be much better.
> >
> > m.c.

--
 -Jim
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