This listing is for a tested strong lot of four vintage 6H6 vacuum tubes, all in the early metal-can style. These are dual diode tubes used widely in WWII-era radios, test gear, and vintage audio applications.

Brands included:

• (2) RCA 6H6 – tested strong, good markings

• (1) GE 6H6 – tested strong, date-coded 1950s

• (1) Ken-Rad 6H6 – tested strong, some cosmetic wear on shell

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✅ Details:

• Tube Type: 6H6 dual diode

• Base: 7-pin

• Construction: Metal shell, USA-made

• Tested: Yes, all 4 tubes show strong emissions on calibrated tube tester

• Condition: Used, tested strong. One tube shows surface corrosion but performs well

• Logos: RCA, GE, and Ken-Rad markings visible

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🧪 Test Status:

• Tested on Conar 224 emissions tester

• Strong emissions and heater continuity confirmed

• Ready to install and use

• Sold with functional guarantee

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📦 Shipping:

• Carefully packed and shipped with tracking

• We combine shipping and use USPS Ground Advantage

• International shipping available