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ID = 82428
Tube type:  Klystron, linear Beam   SHF/EHF (>3 GHz) 
Identical to NVF40A

Base Miniatur-7-Pin-Base B7G, USA 1940 Top contact with one pin.
Was used by Military and/or Government
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC

Type: Floating drift klystron.

Freq: 3,8 to 4.2 GHz

Output: 500mW

Development: Norwegian Defence Research Establishment and Norwegian Technical University started in 1950. Further developed at NERA, Bergen from 1955.

Production: NERA, Bergen Norway from 1958 to 1975 (?). Compared with the 6BL6 and 2K56 klystrons life time of 1500-2000 hours, the production requirement was estimated to be 1500 tubes/year. But after several years the average life time was measured to be 30,000 hours and production had to be scaled down to 150 pcs/year. Total production: 6000 tubes.

Usage: Mostly used in military radio lines (NATO) until 1990, 

The NERA klystron tube is the only tube which has been developed and produced in Norway since "Hansen Vakuumror Fabrikk" made tubes for the Norwegian Navy in the 1920/30s.

Dimensions (WHD)
incl. pins / tip
33 x 67 x 122 mm / 1.30 x 2.64 x 4.80 inch
Weight 34 g / 1.20 oz
Information source -- Collector info (Sammler)   
NVF40A: Just Qvigstad collection
Just Qvigstad


from Just Qvigstad

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