6JD6 Vintage Vacuum Tube
The 6JD6 is a beam power tube originally developed for high-voltage, high-frequency service in communications equipment. It was commonly used in RF output and sweep circuits, where strong output capability and stability under demanding conditions were required.
Designed to operate on a 6.3V heater, the 6JD6 became popular in amateur radio and CB transmitter applications due to its ability to handle higher plate voltages and deliver reliable RF power.
Where the 6JD6 Is Commonly Found
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Ham radio transmitters and RF amplifier stages
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Linear amplifiers in amateur radio setups
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CB radio output sections
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Certain sweep and horizontal-output style applications
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Specialty high-voltage signal equipment
Unlike small-signal dual triodes used in guitar preamps, the 6JD6 is a power tube intended for RF and output duties rather than standard audio amplification stages.
Most original 6JD6 production came from major American manufacturers including RCA, GE, and Sylvania during the peak era of U.S. vacuum tube manufacturing.
Tested 6JD6 Replacements Available
We offer genuine NOS and strong-testing vintage 6JD6 vacuum tubes suitable for radio restoration and transmitter service.
Each tube is:
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Tested for proper emission and output strength
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Screened for shorts and leakage
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Verified for stable operating performance
All tubes are backed by our one-year warranty.
For more information on tube types, compatibility, and restoration guidance, visit our Tube Buyer’s Guide.