RCA 1636 beam deflection mixer.
This valve was used as a balanced mixer for 600MHz. It was used in the AN/TPS-3 radar.
The metal cylinder inside the valve is marked with E (or three horizontal bars) and 286.
The operation of the valve depends on the movement of an electron beam across narrow apertures. A well defined rectangular electron beam is focussed on a barrier, and deflected across two narrow apertures by a signal voltage and a local oscillator voltage applied to the deflector electrodes. It also incorporates a single stage of secondary-emission multiplication.
|The construction consists of a cathode, a cathode shield (g1), and a combined grid-anode (g2, 3 and 4) assembly. G2 and 3 are apertures, followed by the deflecting electrodes, and finally G4 which has a barrier aligned with the apertures of g2 and 3 which stops the electron beam. Two apertures either side of this barrier allow the beam to reach the dynode when deflected to pass through them.|
This file was last modified
15:10:04, Tuesday September 02, 2014