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ID = 72508
United States of America (USA)
Brand: Perryman Electric Co., Inc.; North Bergen, NJ
Developer: Perryman Electric Co., Inc.; North Bergen, NJ 
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to PR216A
First Source (s)
1926 : -- Original prospect or advert

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 0.75 Ampere / Direct / Specified voltage AC/DC
Description This tube was developed by Perryman and first advertised towards the end of 1925. It used an oxide coated filament with low current capacity. They were used in some battery eliminators. 
Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Information source Radio Engineering   June 1927, page 775
-- Collector info (Sammler)   

pr216a_pins.png PR216A: Fin Stewart
Fin Stewart

Just Qvigstad
PR216A: Manufacturer's Literature 1926
Anonymous 15 Collector

Usage in Models 1= 1926?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of



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