Remote-cutoff beam pentode, intended for operation as shunt voltage regulator up to 30KV. Small-shell duodecal base, 7 pin used. Made by GE and RCA.
The 5890 was used in RCA theater projection sets. It's a nice example of low production, "cobbled together" design, consisting of the electron gun and neck section of a 5TP4 projection CRT, firing into an anode lifted from the 2X2A/879 HV rectifier.
[Text from Bob Weiss N2IXK]
Literatura
Essential Characteristics, GE 1973
- - Manufacturers Literature
Tube Lore (I)
5890: Manufacturer's Literature
Emilio Ciardiello
5890: ARRL Handbook 1972
Anónimo 10 Coleccionista
Just Qvigstad
5890: Manufacturer's Literature
Emilio Ciardiello
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