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12AD7

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ID = 5273
       
 
   
Tube type:  Double Triode 
Identical to 12AD7
Similar Tubes
Multiple differences or of other kind:
  12AX7
Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 12.6 Volts / If 0.225 Ampere / Indirect
Description Low-hum, low-microphonic dual triode, intended for audio preamplifier stages. Mu 100.
Similar to 12AX7 with heater current raised to 225mA. 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
-- Original prospect or advert   
Tube Lore (I)
12ad7.png
12AD7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
no15_3.png 12AD7: RTT 1974 (Franzis) 13. Auflage
Martin Renz

Just Qvigstad 		12ad7_characteristics.png
12AD7: My schematic collection.
Pier Antonio Aluffi
Usage in Models 1= 1950?? ; 1= 1955? ; 2= 1956?? ; 3= 1956? ; 6= 1957? ; 1= 1958?? ; 1= 1958? ; 3= 1959? ; 1= 1959 ; 1= 1960? ; 1= 1962? ; 2= 1962 ; 1= 1963?? ; 1= 1964? ; 1= 1964 ; 3= 1965?? ; 1= 1966
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):30

Collection of

Museum Roggenhofer (A)
Karlheinz Fischer (D)
 
12ad7.jpg

12AD7
 
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