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ID = 72494
United States of America (USA)
Brand: Perryman Electric Co., Inc.; North Bergen, NJ
Tube type:  Triode, vacuum   Power/Output 
Identical to PA245 = 145 = UX245 = CX345 = 45 = 245
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 2.5 Volts / If 1.5 Ampere / Direct / Specified voltage AC/DC
Description The advertisement in "Radio" Nov. 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 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 also 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
Information source Radio (magazine)   November `1929 page 61.

ux_base_standard~~104.png PA245: Fin Stewart
Fin Stewart

Just Qvigstad
PA245: Manufacturer's Literature 1929
Anonymous 15 Collector


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