[sdiy] Re: OA91 germanium diode substitute

[Heitor Alves]

The OA91 is presented in a theremin schematic, from EPE magazine. They
just say germanium diode, and dont mention anything about using other
kind of diodes... i've been talking to paul perry and roy, and they
suggested the BAT85.
The diodes used in the theremin are betwen the oscillator (volume
antenna) and the audio amplifier.

:)

heitor

p.s. i'm always stumbling on strange parts projects :D

On Thu, 17 Mar 2005 23:59:51 -0800, harrybissell
<harrybissell at prodigy.net> wrote:
> I don't have the spec of the OA91, but you might try substituting
> a 1N34A, a very common germanium diode.
> 
> Where are you using it ?   It may be possible to use a shottky diode
> such as the 1N5817 which has a similar (low) forward voltage drop.
> 
> I fixed my scope with a 1N34A as a sub for an unobtainable germanium
> diode...
> 
> H^) harry
> 
> Heitor Alves wrote:
> 
> > Anyone knows a good subst for this OA91 germanium diode? i cant find
> > any in here (portugal).
> >
> > Thanks!
> >
> > heitor
> 
>