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12BT6

Informazioni - Aiuto 
ID = 5325
       
Stato:
USA (Stati Uniti d'America)
Produttore: Common type USA tube/semicond.
Progettista: Sylvania (Hygrade, GTE, Nilco); Emporium (PA) 
Tipo:  Doppio diodo - triodo   Audio Frequency 
  late but very rare
Identico a 12BT6
Valvole simili
Other shape (e.g. bulb type):
  12AT6 ; HBC90
Heater different:
  6BT6
Heater and shape different:
  6AT6 ; EBC90

Zoccolo Miniatur-7-Pin-Base B7G, USA 1940
Utilizzata per Radio/TV-reception etc.
Filamento Vf 12.6 Volt / If 0.15 Ampere / Indirect / Specified voltage AND current AC/DC
Descrizione

In one 1950 RMA release, release 820, Sylvania put out 7 market failures; a series of duo-diode triodes: 6BK6, 12BK6, 26BK6; 6BT6, 12BT6; 6BU6, 12BU6. These were largely identical in concept. All have the same 7BT basing. Besides the filaments, the difference is in the triode gains. The ‘BK6 triodes have a gain of 100; the ‘BT6 triodes have a gain of 70; and the ‘BU6 triodes have a gain of 16. I have had 12BT6 and 12BU6 tubes in my collection for a while, but have recently run across the 6BK6 and 12BK6. The ‘BK6 and ‘BT6 lost out to the 6AT6 and 12AT6, and the ‘BU6 lost out to the 6BF6 and 12BF6. (Source: Jim Cross)

 
Quotazioni 1 Quotazioni (visibili solo per gli associati)
Bibliografia Essential Characteristics, GE 1973   

12bt6.png
12BT6: Schematic from my documents.
Pier Antonio Aluffi

mi6_8.png 12BT6: RTT 1974 (Franzis) 13. Auflage
Martin Renz


Just Qvigstad
 

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