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,
Small Signal Valves
Octal Double Triodes
Modern Battery Valves
These are all B7G based valves with 1.5 volt heaters, used in valve portable radios in the 1950s and early 1960s.
This page has the earlier valves from the 20s and 30s or you could look at the battery power triodes.
