Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 49354
Brand: Dario (tubes) - voir aussi La Radiotechnique
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to RT656
Similar Tubes
Normally replaceable-slightly different:
Other base:
Other base and other heater:
First year 1927 Saga of the Vacuum Tube, Tyne pp 404-406

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 2 Sidecontacts.
Was used by Radio/TV-reception etc.
Filament Vf 0.6 Volts / If 1.5 Ampere / Direct / Specified voltage AC/DC

The brandname is RT-Dario. This is an early AC tube, dated 1927.

Information source - - Manufacturers Literature   not dated

f_dario_rt656_sockel.png RT656: Dépliant Dario
Mark Hippenstiel

Just Qvigstad
RT656: own collection
Peter den Boer

More ...

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

Data Compliance More Information