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3B3: Difference between revisions
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==Internals== | ==Internals== | ||
Triggering is done using a 2 mA germanium [[tunnel diodes|tunnel diode]]. The trigger source | Triggering is done using a 2 mA germanium [[tunnel diodes|tunnel diode]], a [[1N3714]]. | ||
is buffered by a [[7895]] Nuvistor triode cathode-follower driving a differential amplifier | The trigger source is buffered by a [[7895]] Nuvistor triode cathode-follower | ||
formed by two [[2N2207]] germanium PNP transistors. The collector current switches the | driving a differential amplifier formed by two [[2N2207]] germanium PNP transistors. | ||
tunnel diode when a triggering event occurs. | The collector current switches the tunnel diode when a triggering event occurs. | ||
Up to serial number 1029, the 3B3 uses Transitron T12G germanium diodes (equivalent to | Up to serial number 1029, the 3B3 uses Transitron T12G germanium diodes (equivalent to | ||