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Ken-Rad JAN 810 Vacuum Tube, High Power Transmitting Triode Used, Tested, in Excellent Condition

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MPN:
810
Condition:
Used
Shipping:
$12.00 (Fixed Shipping Cost)
  • Ken-Rad JAN 810 Vacuum Tube, High Power Transmitting Triode Used, Tested, in Excellent Condition
  • Ken-Rad JAN 810 Vacuum Tube, High Power Transmitting Triode Used, Tested, in Excellent Condition
$74.99
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Description

Ken-Rad JAN 810 Vacuum Tube, High Power Transmitting Triodes Used, Tested, in Excellent Condition

  **All the tubes I sell are tested and come with a money back, satisfaction guarantee**

  Each one of the stock I have, has been tested in a Collins KW-1, 1000 watt transmitter at FULL Modulation, and are all performing up to spec with no problems.

This is the only way to make sure they are good and the ability to compare many 810 tubes in the KW-1, assures RELIABLE comparative testing.

I will combine the shipping and refund any difference.

This is a genuine GE, GL-810 high-mu power triode, tested in a Collins KW-1 transmitter where it was operated and tested at full modulation.
 
It delivers strong, reliable performance with no detectable issues in emission, gas, or shorts.
 
These tubes were proven under real-world high-power AM conditions, making them ideal for Collins KW-1 owners, vintage AM transmitters, modulators, or RF power amplifier projects.
 
 

     

These are premium old-stock examples, meticulously tested in a real Collins KW-1 at full modulation. They handled 100% modulation with rock-solid performance—no arcing, no distortion, just clean, full-power output. In excellent cosmetic condition with pristine glass, bases, and markings, they look as good as they perform. Whether you're restoring a KW-1, building a high-end audio amp, or seeking the ultimate vintage transmitter tubes, these 810s are proven performers ready for decades more reliable service."
 
 
JAN 810 tubes manufactured by Ken-Rad are premium military-specification high-power transmitting triodes, highly regarded for their rugged construction and proven performance in demanding applications like broadcast and amateur radio modulators. The "JAN" designation (Joint Army-Navy) indicates these tubes met strict U.S. military standards for reliability, testing, and durability during the post-WWII era.
 
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Manufacturing BackgroundKen-Rad (Kentucky Radio) originated in Owensboro, Kentucky, evolving from the Kentucky Electrical Lamp Company (founded 1899). By the 1920s–1930s, Ken-Rad became a major independent U.S. vacuum tube manufacturer, producing both receiving and transmitting tubes. During World War II, the company secured significant Signal Corps contracts for transmitting tubes, leading to expanded production and even a dedicated subsidiary (Ken-Rad Transmitting Tube Corp.). Employment peaked dramatically due to wartime demand.In 1945, Ken-Rad sold its receiving tube business to General Electric, but continued operations under GE's umbrella in Owensboro plants (with some tubes still carrying the Ken-Rad name for a period). GE/Ken-Rad facilities emphasized high-quality American manufacturing with precise assembly, controlled gas chemistry, and rigorous quality controls—standards that carried over to military JAN production. These 1950s-era JAN 810 tubes typically feature black plates and a D-getter, reflecting the robust industrial build of the period.
 
 
 
The 810 is a high-mu, directly heated power triode with a 10V/4.5A thoriated-tungsten filament, graphite plate, and ratings supporting up to 2,500V plate voltage and 250W dissipation (ICAS). It excels in Class C RF service (hundreds of watts output) and especially as a modulator due to its high perveance and linear characteristics.
 
 
These JAN 810 tubes made by Ken-Rad represent top-tier vintage military stock:
  • Proven real-world testing: Each tube has been rigorously tested in a Collins KW-1 transmitter at full modulation. They performed flawlessly under peak demands—delivering 100% modulation without arcing, distortion, or instability. This is far superior to standard bench testing and confirms their suitability for high-power service.
  • Excellent cosmetic condition: Pristine appearance with clear glass, sharp markings, intact bases, and no significant wear—ideal for both functional use and display in restorations.
  • Military-spec advantage: JAN tubes like these were built to tighter tolerances than commercial versions, offering exceptional longevity and consistency. As U.S.-made old stock from the 1950s, they are prized by collectors, hams, and audiophiles for authentic performance in vintage gear.

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