GE 6SN7GTB Preamp Tube 1950s USA - Tested

Superior Sound Supply selling some seriously special stock - This NOS General Electric 6SN7-GTB tube represents a classic American build from the peak manufacturing era. This short bottle variant features the desirable side-mounted "fat D" getter and rugged Gray Plates construction.

Technical Specifications

• Type/Model: 6SN7-GTB

• Manufacturer: General Electric (GE)

• Manufacturing Era: c. 1950s (based on D-getter construction)

• Condition: NOS (New Old Stock), without original box.

• Getter Type: Side-Mounted "Fat D" Getter

• Plates Type: Gray Plates (parallel structure)

• Construction: Short bottle, double mica spacers, "Communication" label.

• Test Results (Precision 612): Professionally tested on our calibrated Precision 612 emissions tester.

• Test: No shorts, opens, or leaks.

• Triode 1: 74% Emission

• Triode 2: 80% Emission

Condition Details

This tube is in New Old Stock condition but does not include its original packaging. It will be shipped in a new, sturdy white box. The glass is clean and the pins are straight. Cosmetically, the red GE logo and "Communication" text show some wear, with parts of the silkscreen worn off, as shown in the photos.

Historical/Technical Context

The 6SN7 is arguably the most popular dual-triode ever made, serving as a driver or preamp tube in countless hi-fi and audio applications. This GE 6SN7-GTB "Communication" variant was built for reliability, and the side D-getter construction is prized by audiophiles for its sound signature and robust build quality, often preferred over later halo-getter types.

Superior Sound Supply Guarantee

Superior Sound Supply Quality Assurance:

Transparency and accuracy are the cornerstones 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.