r/VintageElectronics

Device for demonstrating the properties of electron beams in school physics classes.

The gas-discharge tube contains a hydrogen generator and electron gun.

The device is based on the principle of interaction between the electron beam of the gas-discharge tube and the homogeneous magnetic field created by the Helmholtz coils. A beam of electrons is created in the gas-discharge tube by means of the electron gun. Its brightness, magnitude, and shape are controlled by the "Anode" and "Focus" knobs. The position of the electron beam relative to the magnetic field lines can be changed by rotating the gas-discharge tube around its axis. The magnitude of the magnetic field can be adjusted by changing the supply voltage of the coils.

USSR production, JSC Electronic Instruments, Ryazan', 1989.

These were introduced in 1990. It belonged to my dad and he loved using it. I haven’t had the heart to fire it up as I’d like to leave it just the way it is.

I was analyzing some old PCBs I found for pennies and desoldering parts from them for my new pedals. Look what I found! I feel blessed. I'll keep them in my bedside table for good sleep lol.

Still a legend in my book.

Looking to get this for $30. Needs a new cartridge and a belt. Other than that I have no idea if this is going to be worth it.

Does anyone have any idea what to do with something like this? A couple people have said vacuum tubes can be worth something?? Are they worth trying to sell? Do we just throw them away?