[Milsurplus] EN91 / 2D21 / CV797 xenon filled shield-gridthyratron.

[Sheldon Daitch]

Rod,

Gates also used the 2D21 as part of the cue trigger or timer in their 
tube series
cart machines from the early 1960s.  I don't have a Gates catalog handy to
verify the model.

IIRC, the 2D21 was used to block the tone cue system upon cart start, so the
cart did not stop on the cue tone at the beginning of a cart cut.

73
Sheldon
WA4MZZ

Revcom wrote:
> We used 2D21's in broadcasting years ago for alarm triggers.  Also 
> used in small variable voltage power supplies.
> It's big brother, the 2050, was also used in variable supplies, think 
> one was in ARRL hand book years ago.  Used in
> Juke Boxes too, not sure how.
>  
> Rod
> K0EQH
>  
>
>     ----- Original Message -----
>     *From:* Military1944 at aol.com <mailto:Military1944 at aol.com>
>     *To:* milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>
>     *Sent:* Tuesday, November 11, 2008 4:33 PM
>     *Subject:* [Milsurplus] EN91 / 2D21 / CV797 xenon filled
>     shield-gridthyratron.
>
>     While sorting out some valves with a view to reducing the stock
>     here I found a box marked CV797, which turns out to be an EN91 /
>     2D21 / CV797 xenon filled shield-grid thyratron.
>      
>     Now, what on earth can I use it for ?  Any ideas.
>      
>     Ben G4BXD
>
>     ------------------------------------------------------------------------
>     ______________________________________________________________
>     Milsurplus mailing list
>     Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>     Help: http://mailman.qth.net/mmfaq.htm
>     Post: mailto:Milsurplus at mailman.qth.net
>
> ------------------------------------------------------------------------
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>