Brand: Tung-Sol
Tube Type: 6SQ7 (Double Diode / High-Mu Triode)
Construction: Black Metal Envelope
Condition: Tested / Strong NOS Strength (95/95)
Cosmetics: Excellent condition; metal casing is clean with clear markings.
Packaging: Original Tung-Sol Vintage Box Included.
This vintage Tung-Sol 6SQ7 is a "black metal" style tube in superb condition. It has been professionally tested on my Sencore TC-109 and achieved a perfectly balanced score of 95/95 across its sections. It passed all tests for shorts and leakage. Physically, the tube looks excellent, and it comes protected in its original vintage Tung-Sol box.
Vintage Radios: The standard second detector, AVC, and first audio amplifier tube in classic "All American Five" (AA5) and larger console radios.
Military Gear: Found in various vintage signal corps and communication receivers.
Equivalent: 6SQ7GT (Glass version), 6SZ7 (similar characteristics).
Buy with confidence: Every tube I sell is tested under load on professional equipment (Sencore Mighty Mite TC-109), not just a simple multimeter continuity test. Unlike 'tested' tubes from other sellers that may only check for a completed circuit, I verify emissions, shorts, and leakage to ensure your vintage gear performs at its best. Please see Photo #1 for the actual tester gauge results for this specific tube.
IF THIS TUBE SAYS TESTED IN THE TITLE:
Tested on a Sencore Mighty Mite TC-109 emission tester (scale 0-120). Scores of 90-120 are considered NOS strength. Other testers (mutual conductance/Gm) use different scales and numbers and results are not directly comparable.
PACKAGING: Tubes are wrapped and padded for safe shipping.