Classic Rotary Phones Forum

Other Telephone Information => Off Topic => Radios & TVs => Topic started by: TelePlay on December 06, 2016, 01:19:15 PM

Title: Jefferson Tube Restorer
Post by: TelePlay on December 06, 2016, 01:19:15 PM
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
Title: Re: Jefferson Tube Restorer
Post by: 19and41 on December 07, 2016, 02:44:52 PM
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
Title: Re: Jefferson Tube Restorer
Post by: WB6NVH on April 24, 2018, 02:13:56 PM
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.
Title: Re: Jefferson Tube Restorer
Post by: RB on April 24, 2018, 02:29:08 PM
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.
Title: Re: Jefferson Tube Restorer
Post by: 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
Title: Re: Jefferson Tube Restorer
Post by: RB on April 25, 2018, 11:54:14 AM
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! ;)
Title: Re: Jefferson Tube Restorer
Post by: 19and41 on April 25, 2018, 01:13:12 PM
 ;D