Antique radios, Old Time Radios
HF_non-ring
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Country:
Great Britain (UK)
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| Identical to |
HF_non-ring
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2.7 Volts / If 0.06 Ampere / Direct |
| Description |
This tube is a Dull Emitter type, specially designed to eliminate microphonic noise by damping out vibrations transmitted to the valve base.
The valve is mounted with flexible leads encased in free rubber dampers and the whole is suspended within a protective cover by resiliant bands.
Impedance 59000 Ohms
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| Information source |
- - Manufacturers Literature Undated tube booklet c. 1925
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HF_non-ring: Fin Stewart
Fin Stewart
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Just Qvigstad
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HF_non-ring: Fin Stewart
Fin Stewart
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