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

[Mike Granger]

The neon lamps with an ionization source fired at a lower voltage than 
the plain neon lamps. This is because they didn't have to depend totally 
on the applied voltage to acheive conduction state.

harry bissell wrote:

>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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