Name: 12 Use: Glass tube type used as detectors and amplifiers in battery-operated radio receivers. Electrically the same as 11 Notes: Requires a 4- pin socket. |
12 Detector Amplifier Triode Data Source . . . . . . . . . . Collins 1940 Heater or Filament Voltage. . . 1.1 volts Heater or Filament Current. . . 0.25 amperes EIA Base. . . . . . . . . . . . 4D Substitutes . . . . . . . . . . None. Electrically the same as 11 |
Capacitances and Design Maximum Values: C/in. . . . . . . . . . . . pf C/out . . . . . . . . . . . pf C/g-p . . . . . . . . . . . pf Maximum Plate Voltage. . . volts |
Typical Operation as a Receiving Tube: Description Ep Eg Es Is Ip Rp TC AF Zl PO =================================================================== Class A Amplifier 90 -4.5 - - 2.5 15.5 425 6.6 - - Class A Amplifier 135 -10.5 - - 3.0 15.0K 440 6.6 - - |