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Tube sockets were typically mounted in holes on a sheet metal chassis and wires or other components were ... Tube 75 from the 1930s with UX-6 base and top grid cap.
Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s.
These tubes have very similar characteristics to the 6V6, but differ either in the heater rating, or use a different socket and pin-out 5V6GT - Same as the 6V6GT, but with different heater ratings - 4.7V, 0.6A, controlled 11 sec. warm-up time.
MT – Miniature tube, such as Noval B9A or Miniature 7-pin B7G; FL – Subminiature all-glass elliptical body and flat bases with long, inline "flying leads" (wire-ends) that are soldered into the circuit; SL – Subminiature all-glass elliptical body and flat bases with short inline leads that can be soldered or can be mated with a special ...
1930s: General specifications; Diameter: 0.327 in (8.3 mm) ... for such a connector and socket. ... Rear panel of a 1939 RCA model 45EM vacuum tube desktop AM radio ...
Philco Socket Power A & B Battery Eliminators - 1925 August brochure Philco Model B-60 "B" Socket Power Battery Eliminator - August 1925. Until the mid- to late-1920s, all radios except crystal sets were powered by vacuum tube batteries which were expensive, needed frequent charging, and leaked battery acid, reducing the wife approval factor in ...
Here are seven coins from the 1930s that are worth a lot of money. 1933 Double Eagle. Auction Record: $18,872,250 Designed ...
EF50. In the field of electronics, the EF50 is an early all-glass wideband remote cutoff pentode designed in 1938 by Philips.It was a landmark in the development of vacuum tube technology, departing from construction techniques that were largely unchanged from light bulb designs. [1]