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ID = 20243
Brand: Magnadyne Radio; Torino
Tube type:  Damper, booster, flyback diode   Power-supply 
Identical to 17R7 = PY81 = 17Z3

Was used by Radio/TV-reception etc.
Filament Vf 17 Volts / If 0.3 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Information source - - Manufacturers Literature   
  17R7: Magnadyne 6057 TV set schematic
Giuseppe Feniello
17R7: home made photograph
Giuseppe Feniello

17R7: rtt
Anonymous 10 Collector

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Usage in Models 1= 1960?? ; 1= 1961 ; 2= 1962 ; 2= 1963? ; 3= 1963 ; 1= 1965??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):10

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