Type 231-D Western Electric Audio Receiver Power Vacuum Tube

Country of origin: USA

Production era: Estimate 1930s

Model:   231-D

Manufacturer:  Western Electric 

Type:   power 

Plate type: silver 

Filaments:  standard

Base type: engraved UX 4 brass pins  

Getter frame: solid disk

Getter flash: side

Glass: clear  

Condition:  excellent,  

Usage (estimate):  minimal

Cartons: NA

Quantity:  1

Please review the photos for more detail

Test results:

       Excellent strong test result for Gm:  20

       For Gm, the suggested minimum is:  14  

Shorts: None detected

For testing, a calibrated Military TV-7 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