Products > Test Equipment

Do you have any test equipment in your lab that uses vacuum tubes?

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BravoV:
The only one in the house, Heathkit vacuum tube voltmeter, a freebie meter.

Psi:
I have an old graph paper servo plotter that uses tubes around somewhere.

And i saved a magic eye valve from going to the rubbish tip a while back.
Not sure what project i'll use it in.

tautech:

--- Quote from: Psi on September 09, 2019, 09:58:51 am ---
And i saved a magic eye valve from going to the rubbish tip a while back.
Not sure what project i'll use it in.

--- End quote ---
Gave the only one I've ever had to member Neo in the US as I'll never use it.
He had some project but has never disclosed what.  :-//

Still got a box of assorted tubes that I really must throw out unless you want them ?

Psi:

--- Quote from: tautech on September 09, 2019, 10:08:03 am ---
--- Quote from: Psi on September 09, 2019, 09:58:51 am ---
And i saved a magic eye valve from going to the rubbish tip a while back.
Not sure what project i'll use it in.

--- End quote ---
Gave the only one I've ever had to member Neo in the US as I'll never use it.
He had some project but has never disclosed what.  :-//

Still got a box of assorted tubes that I really must throw out unless you want them ?

--- End quote ---

Only if there's some 12AX7  or EL34 in there.  ;D

amspire:
I have an ESI precision capacitor measuring transformer bridge that uses valves in the tracking oscillator and null detector. The null detector has a sharp bandpass filter that tracks the oscillator over a range of about 20Hz to 20KHz.

Some of the vacuum tubes do not seem to be easily available.

If it starts to fail, I think I might keep the meters, dials, resonant passive components and precision coupling transformers, but replace the valves with a solid state circuits. Maybe make it battery powered.

I also have an old 5MHz BWD oscilloscope that is a transistor-valve hybrid - haven't used it in decades. It was my first scope and I just never felt like getting rid of it. Fantastic triggering.

A basic valve RF oscillator and Vacuum Tube Voltmeter.  They could end up being converted to solid state.

Richard.

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