For sale:
A Vacuum Ant Relay, SO-239 connectors x 3; Labeled COM, N.O. N.C. , machined
aluminum relay capsule enclosure, with two screw coil terminal block. Coil
terminals inside housing labeled L1; L2 40 ohm DC coil resistance Diode
across coil terms, switches with 12 volts, but may still be 24 volt coil,
unknown for sure.
Cant find a P/N or Mfg name, but it is in a 2 x 3.25 x 3.0 machined aluminum
block enclosure, professionally done and painted battleship gray
the SO-239s have a casting number on their flanges: CPH 4919, SO-239 Chicago,
Amphenol
Sorry, No Camera for a picture, and does not match available pics on vacuum
relays on the web.
If you can ID this relay as to make and model, it would be appreciated.
Believed to be made by Jennings.
If you can ID and/or are interested in buying, make an offer...
All the Best, 73,
Pat Barthelow aa6eg@hotmail.com
http://www.jamesburgdish.org
Subscribe: http://bambi.net/jamesburg.html
Jamesburg Earth Station Moon Bounce Team
> Date: Tue, 2 Oct 2007 22:41:34 +0100
> From: g8gsq@eltac.co.uk
> To: amps@contesting.com
> Subject: Re: [Amps] 8877 Grid Trip timing
>
>
> > So I got up my courage at the right moment and
> > shorted the high voltage. It silently tripped off. All
> > the meters went to their standby readings. I guess
> > the HV transformer kind of grunted. But not a
> > sound excepting for LOTS of laughing about how
> > they had got me all prepared for a huge mess and
> > how nervous I ought to be.
> >
> > Clowns!
> In my college work experience days I worked in a team on a L band
> radar system - the output device was a hybrid of TWT with klyston
> built in at the bottom. As best I recall it sat with 40kV across
> it and drew 28A when rf drive was applied giving over 500kW pulse
> out, about 10kW mean. The aim was to modulate the rf drive so as
> to get a square rf output pulse, and there was a diecast box of
> opamps in the corner of the HV cabinet. 'Scope probes were mounted
> on the end of 3' plastic rods to check the test points.
>
> The whole thing was in a big open 'hangar'. One day, with someone
> absorbed in studying the 'scope traces, his 'friend' dropped a 2'
> square plate of aluminium on the floor. It was weeks until he was
> right again. It takes a special sort....
>
> I remember getting a couple of days off when the cooling hose came
> off the dummy load and sprayed all over the HV stuff. It took out
> the local sub station.
>
> Happy days.
>
> Steve
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