Cooling fan and tube life

[Enzo]

Yes, exactly. Better still, drill a hole in the tube and fill the insides with automotive coolant.

[mikepukmel]

Yes, exactly. Better still, drill a hole in the tube and fill the insides with automotive coolant.

Thanks Enzo. After some additional reading, I found that high speed steel drill bits work on glass.
And I happen to have an extra water pump left over from my dad's '65 Ford Fairlane 500.
This is going to be the coolest amp in world history.

[Helmholtz]

Ever wondered why there needs to be vacuum (= nothing) between the electrodes?

[Dave H]

Ever wondered why there needs to be vacuum (= nothing) between the electrodes?

Nothing except for a gazillion electrons but they are just passing through.

[Helmholtz]

Nothing except for a gazillion electrons but they are just passing through.

Sure, but anything else would cause collisions.


Also cooling the cathode wouldn't be a good idea.