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ECH4A

Country:  Italy      Brand:  Philips Italy; Milano (MI) 
  Tube type:  Triode-Heptode   Frequency converter 
  Late but very rare. ***
Tube ID = 19469
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Identical to ECH4A
Similar Tubes Other shape (e.g. bulb type):
 ECH34; ECH4G
Other base:
 ECH4
Multiple differences or of other kind:
 6TE8GT

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If: 0.35 Ampere / -: Indirect / -: Parallel, (AC/DC) /
Literature Il Radiolibro, Domenico Eugenio Ravalico, 8.Ed. (Ulrico Hoepli), Milano   

philips_ech4a_1.jpg
M.C.
Alessandro De Poi

 
6j9sgmbasdiag2.png
schematic diagram
Jacob Roschy

 
Usage in Models (calculation each 25th of the month)   1= 1946? ; 1= 1946 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   2
Further Information for

ECH4A    

ECH4A (ECH4A)  (30.04.2009) Jacob Roschy Clicks: 276     Replies: 2
Fortunately we could find out information about data and origin of the before mysterious ECH4G. Fortunately we could find out information about data and origin of the before mysterious ECH4G. Now the secret of this ECH4A is yet to be solved. Because of the straight bulb shape the ECH4A may probably be an Octal version of the E1R ? Can anybody confirm this, e.g. by comparing the data ? Even checking the heater current will give some evidence, since the heater current of the E1R is only 0.2 A, while the heater current of the normal ECH4 is about 0.35 A.   Best regards, Jacob  
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