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PA112A

Information - Help 
ID = 72495
       
Country:
United States of America (USA)
Brand: Perryman Electric Co., Inc.; North Bergen, NJ
Tube type:  Triode, vacuum   Power/Output 
Identical to PA112A = 112A = 12A
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 through it for sturdiness, insulation and parallel alignment. The second bridge was placed on top of the element structure. In directly heated tubes, the top of the filament was also held in place with a tension spring. The element structure would have been expensive to make and it is not known this tube variation was commercially available. 
Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Literature Radio (magazine)   Nov. 1929 page 61
 
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PA112A: Fin Stewart
Fin Stewart

 
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PA112A: Manufacturer's Literature 1929
Anonymous 15 Collector


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