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this thing is about two and a half to three inches long ?

 

About that Wally I should think.

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Would it be some sort of bleed screw? The cone shape looks like it could make a seal when screwed into an opening

 

Good thought Rob but it is a more sophisticated thing than that.

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its not a bulb is it a isolator

 

Wally nope, but is something that the Germans were developing in WW2.

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Klystron tube?

 

Not a German invention Lauren

 

PS Just seen your correction not that either

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It's not something to do with UV night vision is it?

 

Good line of thinking Lauren but it is not vision related. It was designed to work off 1,000 volts.

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Can we assume the three divisions on the cone denote live neutral and earth electrical contacts?

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Rectifier? (Possibly mercury vapour type with the screw-in part having the heater coil to get it started and the not-shown other end being the anode connection.)

 

Could also be a thyratron or ignitron, I suppose.

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Rectifier? (Possibly mercury vapour type with the screw-in part having the heater coil to get it started and the not-shown other end being the anode connection.)

 

Good call :)

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I was going to say carbon arc electrode too! :cheesy:

 

Alec.

 

Nope Alec, come on you could win this!

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Hold on, 1000V. is this the back of a CRT or similar?

 

Nope Lauren not that.

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Can we assume the three divisions on the cone denote live neutral and earth electrical contacts?

 

Bernard of the three divisions. Top is live, middle is insulator, lower is case & earth.

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