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PR280

Information - Help 
ID = 72499
       
Country:
United States of America (USA)
Brand: Perryman Electric Co., Inc.; North Bergen, NJ
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to PR280 = 280 = 80 = UX280 = CX380 = 480 = 180
First Source (s)
1929 : -- Original prospect or advert

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 2 Ampere / Direct / Parallel, (AC/DC)
Description The advertisement in "Radio" November 1929, page 61 shows that this tube was fitted with the patented ceramic Perryman Bridge. This was two special spacers, one placed between the press and the element base. This had the necessary wires pass through it for sturdiness, insulation and parallel alignment. The second bridge was placed on top of the element structure. In directly heated tubes, the filament was held in place with a tension spring. This element structure would have been expensive to make and it is not known how long this tube variation was commercially available. 
Dimensions (WHD)
incl. pins / tip
x 137 x 54 mm / x 5.39 x 2.13 inch
Weight 67 g / 2.36 oz
 
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PR280: Fin Stewart
Fin Stewart

 
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PR280: Manufacturer's Literature 1929
Anonymous 15 Collector


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