Two Tested Type 71A Hytron / Philco Audio Receiver Power Amplifier Vacuum Tubes
Country of origin: USA
Production era: Estimate 1930s
Model: 71A
Manufacturer: Hytron
Type: power
Plate type: silver with copper rods
Filaments: hanging V
Base type: UX 4 pins
Spacers: one
Getter frames: dimpled foil
Getter flash: circular side
Glass: clear
Stencils: one very good, one no marks
Condition: excellent, minor variations
Usage (estimate): nominal
Quantity: 2
Please review the photos for more detail
Test results:
Excellent strong test results
for Gm: 76 and 74
For Gm, the suggested minimum
is:
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
day
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