[sdiy] Tubes in Synths [ was : Harry's Nightmare! ]

[harry bissell]

NE-58 are a gas discharge (neon) lamp. These were
often used as we would use zener diodes today, as
shunt regulators.

I'm not POSITIVE but I think the little black dot
meant that the tube used an ionization source
(radioactive) to stabilize the firing point.

Anyone willing to admit to being MUCH older than
me ???

H^) harry



--- alex dickey <perpetual at uswest.net> wrote:
> 
> > On a related note, I found a schematic for an old
> tube opamp which
> > is I think one of the first packaged opamps made.
> > http://www.themusic.net/schematics/tube-opamp.gif
> 
> can someone fill me in on what the NE-58's are? 
> i've never seen that
> symbol before.
> 
> thanks,
> alex
> 
> 


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