Gas fueled tubes

[Ears]

WTF
http://www.youtube.com/watch?v=WNl0sFVi ... re=related

[guitarsnguns04]

that guys got to much time on his hands..is the flame just taking the place of the heater then? and no vacuum obviously

[frequencycentral]

.....

[martin manning]

that guys got to much time on his hands..is the flame just taking the place of the heater then? and no vacuum obviously

Cute. The cathode is heated by the flame, so the flame is doing the job of the heater, and since a visible flame is ionized gas, that must be allowing electron flow and substituting for the vacuum. I guess the electrons have enough energy to jump to the plate. The Morse sounds like VDEK7NSVV... amateur radio call sign?

MPM

[Wayne]

Close - V is the letter almost universally accepted as the "test letter" - usually sent in groups of three.

DE is from in French - universally used, I guess, because it's shorter than the English word.

His call sign is K7NS. I don't remember much about American call signs, but I think 7 is the southwest.

And now you know how I got my introduction to vacuum tubes.

W

[martin manning]

Thanks for the explanation, Wayne. I don't know much about it, but I think with only 4 characters in his call sign, this cat has been around a while.

MPM

[Wayne]

I think you're right. There are 5 levels of licensure in the US and each level has access to a different length call sign, with the more advanced licences getting more priveliges and shorter calls. Very confusing. I have full priveliges here in Canada up to I think 250W, but haven't sent a single dot or dash in about 10 years.

W