Antique radios, Old Time Radios
NVF40A
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| Tube type: |
Klystron, linear Beam SHF/EHF (>3 GHz) |
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| Identical to |
NVF40A
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| Base |
Miniatur-7-Pin-Base B7G, USA 1940
Top contact with one pin.
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| Was used by |
Military and/or Government |
| Filament |
Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC |
| Description |
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.
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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)
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Just Qvigstad
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