Antique radios, Old Time Radios
R69
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Country:
France
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| Identical to |
R69
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
2 Sidecontacts.
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| Filament |
Vf 3.8 Volts / If 0.1 Ampere / Direct / Battery = |
| Description |
John Koster: As far as we know, this Dario tube (Trigrille) has only been made for a year, with a rather dubious 1st grid. The tube has four pins and two extra pins at the side, one for the first grid and one for the 3rd grid. The additional G1 (connected to a positive voltage) was supposed to give some extra emission by reducing the space charge around the filament.
Péricaud used these valves in some of its Trisodyne models as some sort of unique selling stunt, but in fact it was all "humbug", and production stopped after a year...
To overcome replacement problems, the valves could easily be substituted by a normal "bigrille" without loss of functionality. Of course with some modifications, even a simple triode can be used as a Tropadyne Mixer/Oscillator.
The DARIO data-sheet shows a different pin configuration as STANDARD!
Text in other
languages (may
differ)
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R69: John Koster
John Koster
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R69: John Koster
John Koster
More ...
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Just Qvigstad
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R69: DARIO / v.d.Elst
Wolfgang Holtmann
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3
Collection of
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