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PA240

Information - Help 
ID = 72505
       
Country:
United States of America (USA)
Brand: Perryman Electric Co., Inc.; North Bergen, NJ
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to PA240 = 240 = 440 = UX240 = CX340 = 40
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 0.25 Ampere / Direct / Battery =
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 the element base. This had the necessary wires pass through it for sturdiness, insulation and parallel alignment. The second bridge was place on top if 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 108 x 45 mm / x 4.25 x 1.77 inch
Weight 47 g / 1.66 oz
Information source Radio (magazine)   November 1929, page 61
 
ux_base_standard~~83.png
PA240: Fin Stewart
Fin Stewart

 
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PA240: Manufacturer's Literature 1929
Anonymous 15 Collector


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