RCA 6SN7GTB Preamp Tube 1969 - Tested

This listing is for a single, New Old Stock (NOS) RCA 6SN7GTB black Plates dual triode vacuum tube in its original box. Renowned for their rich tonal quality, low noise, and musicality, these U.S.A.-made tubes are highly sought after for high-fidelity audio applications. This specific tube features the desirable black Plates construction and has tested strong, making it an excellent choice for upgrading preamplifiers, headphone amps, or as a driver tube in power amplifiers. The date code on the box indicates a manufacture date of April 1969.

Condition Assessment

• Condition: New Old Stock (NOS) / New In Box (NIB).

• Visual Inspection: The tube is in pristine physical condition with clear glass, straight pins, and intact logos. The internal structure is perfectly aligned.

• Original Box: The tube comes in its original RCA box, which is in good condition with legible print.

Technical Specifications

• Manufacturer: RCA (Radio Corporation of America)

• Model: 6SN7GTB

• Type: Medium-Mu Twin Triode / Preamp Valve

• Heater Voltage: 6.3 Volts

• Heater Current: 0.6 Amps

• Plates Voltage (Max): 450 Volts

• Plates Dissipation (Per Plates): 5 Watts

• Amplification Factor (\mu): 20

• Base: Octal 8-pin

• Construction: Black Plates

• Origin: Made in U.S.A.

• Date Code: 4-69

Testing Methodology

This tube was thoroughly tested on a calibrated Precision Series 612 emission tester. Both triode sections were tested individually for shorts, gas leaks, and cathode emission. As shown in the photographs, the tube tested strong and balanced in the "GOOD" section of the meter for both sections, indicating robust performance and a long service life ahead.

Compatibility Information

The 6SN7GTB is one of the most popular dual triodes ever made and is used in a wide range of audio equipment. It is a direct replacement for any 6SN7 variant (GT, GTA) and is prized for its sonic characteristics. Common applications include:

• Hi-Fi Stereo Preamplifiers

• Driver stages in tube power amplifiers

• Phase inverters

• Headphone amplifiers

• Vintage radio equipment

• Some models of guitar amplifiers

Shipping Details

• Provider: Your item will be shipped via USPS. For high-value or large items, FedEx may be used.

• Location: Shipping from Superior, WI.

• International: International shipping is available, including to Australia.

• Packaging: The tube will be carefully packed to ensure it arrives safely.

Return Policy

• We offer an industry-standard 30-day return window for unused items returned in their original packaging.

• A full refund is available for components that are damaged in transit or fail to meet the published technical specifications.

• Opened and used electronic components, like this vacuum tube, are subject to different return conditions due to the need for testing and compatibility verification. Please contact us if you experience any issues.

• A Return Merchandise Authorization (RMA) number is required for all returns to ensure efficient processing.

• Return shipping costs are covered by us only for items that are defective or not as described.