Tung-Sol 6SN7GTB Preamp Tube 1950s USA - Tested

Superior Sound Supply selling some seriously special stock. This is a genuine vintage Tung-Sol 6SN7GTB manufactured in the USA, featuring the desirable black "T" Plates. This tube has been professionally tested and verified as a strong performer, making it an excellent choice for audiophiles seeking to upgrade the driver or preamp stage of their vintage Hi-Fi or amplifier.

Technical Specs

• Brand: Tung-Sol
• Model: 6SN7GTB
• Type: Dual Triode
• Date/Batch Code: 322KR3
• Plates Construction: Black T-Plates
• Getter: Top Halo
• Test Results (Triode 1): 90%
• Test Results (Triode 2): 88%
• Shorts/Leaks: None

Condition Details This tube is in excellent cosmetic and functional condition. The glass envelope is clear with no loose particles, and the black phenolic base is tight and free of cracks. The silver factory labeling is remarkably crisp and fully legible. The pins are straight and clean, ensuring a solid connection. Functionally, this tube tests very strong with high emission scores (90/88) and passes all checks for shorts, opens, and leakage on our Precision Model 612 tester.

Historical & Technical Context The Tung-Sol 6SN7 family is legendary among audio enthusiasts for its rich tone, clarity, and soundstage. The "GTB" designation indicates a controlled warm-up time and higher Plates voltage tolerance compared to earlier GT versions, making it a rugged and reliable choice. The Black T-Plates construction is often preferred for its warmth and detail compared to later Gray Plates versions.

Superior Sound Supply Guarantee

Superior Sound Supply Quality Assurance: Transparency and accuracy are the cornerstone of our business. We ensure every component is vetted so you can buy with complete confidence. Along with Superior Supplies for all of your sounds, We stand on Superior Service, If your not satisfied with our supply we will make it right.

Shipping: Carefully packaged with consistent methods that are proven to protect your item and ensure safe delivery. We primarily use USPS, and FedEx for large or high-value items, and can arrange international shipping to anywhere in the world. Orders are processed and shipped within 1-3 business days of payment clearance. We do not ship on weekends or federal holidays. Orders placed after 2:00 PM CST Friday will ship the following Monday.

Returns:

• New Items: Returnable within 30 days of delivery.
• Used & Vintage Items: Returnable within 30 days of delivery.

General Terms Items must be returned in original, as-shipped condition with all original packaging and no signs of use. Buyer assumes responsibility for all return shipping costs unless the item was not received as described. Make sure to check the return policy on each individual listing as some items may be sold "As-Described" and not eligible for a return. We want you to be completely satisfied with your purchase.