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Name: 6C4 Use: Miniature tube used in smaller receivers as a local oscillator in FM and other high- frequency circuits. It may also be used as a class C rf amplifier. In class C service it delivers a power output of 5.5 watts at HF, and 2.5 watts at 150 MHz (VHF). Might be used as a QRP power osc. Notes: Tube requires a miniature 7-pin socket and may be mounted in any position. |
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6C4 Medium-Mu Triode Heater or Filament Voltage . 6.3 volts Heater or Filament Current . 0.15 amperes EIA Base . . . . . . . . . . 6BG Substitutes . . . . 6135 6AB4 6DR4 |
Capacitances and Design Maximum Values: C/in. . . . . . . . . . . . 1.8 pf C/out . . . . . . . . . . . 1.3 pf C/gp. . . . . . . . . . . . 1.6 pf Plate Dissipation . . . . . 3.5 watts Maximum Plate Voltage . . . 300 volts Maximum Plate Current . . . 25 ma Maximum Grid Current. . . . 8.0 ma Maximum Frequency . . . . . 54 MHz |
Typical Operation as a Receiving Tube:
Description Ep Eg Es Is Ip Rp TC AF Zl PO
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Class A Amplifier 100 0 - - 11.8 6250 3100 19.5 - -
Class A Amplifier 250 -8.5 - - 10.5 7700 2200 17 - -
Typical Operation as a Transmitting Tube:
Class of Service Ep Eg Ip Ig Drive Zl PO
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Class C Amp/Osc 300 -27 25 7.0 0.35 - 5.5
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