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ME-664-A

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ID = 43073
       
Country:
Japan
Brand: NEC Corporation, Nippon Electric Co. Ltd. (Nippon Denki); Tokyo
Developer: NEC Corporation, Nippon Electric Co. Ltd. (Nippon Denki); Tokyo 
Tube type:  Vacuum Pentode   Frequency converter 
Identical to ME-664-A
Similar Tubes
Normally replaceable-slightly different:
  954

Base SPECIAL TUBEBASE in general Top contact.
Was used by Military and/or Government
Filament Vf 6.3 Volts / If 0.15 Ampere / Indirect / Specified voltage AC/DC
Description

The ME-664-A is an "acorn style" pentode manufactured by NEC for use as a VHF amplifier, detector or oscillator. It was used for the "Tachi 6" Early Warning Radar developed in 1942 as the RF amplifier and the local oscillator.
So the ME-664-A should be developed in 1942 or just before 1942.

Plate Voltage: 250 V
G2 Voltage: 100 V
G1 Voltage -3.0 V
Plate Current: 2.7 mA
gm: 1,500 Micromhos
Plate Resistance: 0.8 Megohms
Heater Voltage: 6.3 V
Heater Current: 0.15A

 
Dimensions (WHD)
incl. pins / tip
x 123 x 45 mm / x 4.84 x 1.77 inch
Weight 48 g / 1.69 oz
Information source Babani, International Radio Tube Encyclopaedia   Dawn of Tube Production in Japan - Ohtsuka.
-- Collector info (Sammler)   Dawn

me_664_a_sockel.png ME-664-A: H. Kato
Stefan Müller

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