Re: [sdiy] Kärmes tube oscillator and instrument amplifier

[mike ruberto]

I used to go exploring at Fort Hero in Montauk, NY before they turned
it into a state park. Back then you could walk through the buildings
including the SAGE radar installation. The transmitting tower had a
135 ft wide dish on top. Everything was 50s tube technology in there.
The room with the magnetron tube was just like a Frankenstein lab but
with everything painted military grey. The magnetron tube itself was
this gigantic oil cooled thing the size of a golf cart. Unfortunately
vandals has either destroyed or removed all the large tubes in the
other equipment but judging from the size of the sockets there were
tubes in their as large as my head at one time.
Really cool stuff.

Mike

On Jan 19, 2008 12:36 PM, Neil Johnson <neil.johnson97 at ntlworld.com> wrote:
> Reminded me of when I was at EMI Hayes (fond memories).  Round the
> back there were some pretty scary valves alright - mostly copper
> though!  Some of the older radar stuff looked right out of the set of
> Frankenstein.
>
> Neil
>
> On 20 Jan 2008, at 04:35, Travis Shire wrote:
> >> If you want to do some valve pR0n then this site is amazing:
> >>
> >> http://www.tubecollector.org/about.htm
> >>
> > Check out the specs on that water cooled triode.
> >       Filament voltage 31.5 - 34V
> >       Filament current 440 - 470A
> >       Anode voltage 20kV dc max
> >       Total emission 100A
> >       Anode current 20A max
> >       Continuous anode dissipation 150kW max
> >       µ 40 - 48
> >       Impedance 800 - 1200 ohms
> >       Grid current 4.5A max
> >       Grid power 8kW max
> >       Frequency 30MHz max
> >       Inter electrode capacitances
> >       Grid to filament 101pF
> >       Anode to filament 6pF
> >       Anode to grid 51pF
> >
> >
> > Speechless.......
>
> --
> http://www.njohnson.co.uk
>
>
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>