Antique radios, Old Time Radios
539-A
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Country:
United States of America (USA)
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| Identical to |
539-A
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| Similar
Tubes |
Other class quality (otherwise equal):
955
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| Base |
Acorn 5 pin 5AA
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| Was used by |
Technology / Measurement |
| Filament |
Indirect |
| Description |
This tube made by RCA for Boonton. It is a special quality type for use in the Boonton 170A Q meter, oscillating section. It is coded Q-VM-955.
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Dimensions (WHD)
incl. pins / tip |
x 37 x 23 mm / x 1.46 x 0.91 inch |
| Weight |
6 g / 0.21 oz |
| Information source |
Tube Lore (II) p. 151
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539-A: Fin Stewart
Fin Stewart
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Just Qvigstad
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