Tested Pair of 6DJ8 ECC88 Amperex White Letter Audio Receiver Pre-Amp Vacuum Tubes 

Country of origin: Holland

Production era: Estimate 1960s

Model:   6DJ8 ECC88

Manufacturer:   Amperex

Type:   preamp 

Plate type: gray with separators

Filaments:  standard

Base type:  9 pins 

Spacers: two

Getter guard: dual supported

Getter frame: halo wire

Getter flash: top

Glass: clear with seams

Stencils: total wear

Etch code: GA7 3F4 and 6AA 5E4

Condition:  excellent

Cartons: NA

Usage (estimate):  moderate

Quantity:  2

Please review the photos for more detail

Test results:

       Excellent strong balanced test results for Gm:  10750 / 10500 and 8750 / 8000

       For Gm, the suggested minimum is: 7750

Shorts: None detected

For testing, a calibrated Hickok 539C tester was used

Compatibility: Suitable for vintage tube-based equipment, ideal for use in audio amplifiers, power amps, and general tube equipment

The tubes 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