Tested Quad of 6EA7 6EM7 GE NOS NIB Audio Receiver Preamplifier Vacuum Tubes    

Country of origin: USA / Canada

Production era: 1950s – 60s

Model: 6EA7 6EM7 

Manufacturer: GE

Type:   preamp

Plate type: gray with copper rods / grid radiators

Base type: octal 8 pin 

Spacers: two 

Filaments: standard

Getter frame: halo wire

Getter flash: side

Glass: clear 

Stencils: excellent

Condition: mint same construction

Original cartons: originals

Usage: NOS (new)

Quantity: 4

Please review the photos for more detail

Test results:

Excellent strong balanced test results for Gm: 

        1.6 / 7.8, 1.65 / 82, 1.9 / 7.4 and 1.70 / 8.0

For Gm, the suggested minimum value is: 1.0 / 3.6       

Shorts: None detected

For testing, a calibrated Triplett 3444A tester was used

Compatibility: Suitable for vintage tube-based equipment ideal for use in tube preamplifiers, power supplies and vintage audio / test equipment

The tube will be carefully packed to ensure safe shipping

Estimated delivery time within the USA is 3 to 7 business days

Standard shipping service is US Postal 1st class

Shipping is combined when applicable

Please feel free to contact us if you require any additional information