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The GL5J29 is a two anode magnetron.
The filament is visible as a rod passing through the circular hole formed by the two anodes. An output tuned circuit would be connected to the anodes with the DC power fed into a centre tap.
The wide glass tube envelope is 47 mm in diameter and, excluding the base pins, is 150 mm tall. The base is a four pin special, with two large pins and two small pins.
Reference: Observation.


Updated January 08, 2013.
shape:wide.glass.tube construction:all.glass type:magnetron age:1930.1940 base: pin:
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