valve, tube, thermionic, electron, triode, tetrode, pentode, power,
magic eye, tuning indicator, nixie, history, data, data sheet,
specification, amplifier, radio, octal, B9A, B7G, B4, IO, KT88,
KT66, 12AX7, 12AY7, 12AT7, ECC81, ECC82, ECC83, 6L6, 6V6, EL34,
EL84, EM34, EM80, EM81, EM85, Mullard, Cossor, GEC, Gold Lion,
Marconi, Svetlana, Brimar, Ferranti, RCA, Sylvania, GE,6202,
amperex, arcturus, brimar, channelmaster, colvern, cossor dario,
debanks, edicron, ediswan, ei, elpico, emi emston, era, eratron,
ever-ready, ferranti, ge, gec heinz, kaufman, haltron, hivac, hrs,
itt, jackson lamba, lorenz, marconi, mazda, mullard, national,
osram philips, rank, raphone, raytheon, rca, rft, selectron sovtek,
standard, svetlana, sylvania, telefunken, tronix, tungsram united,
valvo, westinghouse, zaerix
Tungsram R208
Tungsram Hungary, "Barium Tube" possibly
using the Azide process? Early 30's. 2 volt, 150 mA filament,
maximum anode voltage 200 V. B4 base. Equivalent to the Mullard
PM1A. I have very little information on these so any information
would be very much appreciated. Mail me here if you can help.
