This goes back to the early 1920s. 4 pin tubes with bayonet mount. Top view shows two pin connections. PM page presents it well (note the screw in bulb socket power plug).
Did these really work and if so, how, cleaning off what?
http://www.ebay.com/itm/VINTAGE-1920S-JEFFERSON-TWO-TUBE-TUBE-REJUVENATOR-NR-/162302779687
I would bet they increased the filament potential to "burn" off any residual oxygen and carbon in the envelope. Not too much else one can do with household current
They were used to "rejuvenate" early and primitive tubes with thoriated tungsten (?) cathodes. Yes they did work, at least a couple times, and yes, they worked by burning off impurities.
There were machines for both small tubes, and crt's
The cleaning would usually" clean off impurities from the elements,but it would return.
The process could be repeated a few times to obtain the desired result. which prolonged the life of the tube.
The flip side, too much extra juice, could pop the element, and dead tube.
This procedure did not work on later tubes, as the construction was just too whimpy,
and the elements would melt, and short to each other.
The earlier 1950's CRT rejuvenators, were actually used to remove all of the Dead Cowboys, and Indians that had collected on the bottom side of the CRT.
D/P
Quote from: Dan/Panther on April 25, 2018, 11:48:37 AM
The earlier 1950's CRT rejuvenators, were actually used to remove all of the Dead Cowboys, and Indians that had collected on the bottom side of the CRT.
D/P
Oh, that's good!
you twisted rascal! ;)
;D