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6BU6

Information - Help 
ID = 4686
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Sylvania (Hygrade, GTE, Nilco); Emporium (PA) 
Tube type:  Double Diode-Triode   Audio Frequency 
  Late but very rare. ***
Identical to 6BU6
Similar Tubes
Other shape (e.g. bulb type):
  6BF6
Heater different:
  12BU6
Heater and shape different:
  12BF6
First Source (s)
17.Jan.1950 : Electron Tube Registration List

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description

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)

 
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   

6bu6.png
6BU6: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector

mi6_g_5.gif 6BU6: RTT Schwandt
Günther Stabe † 19.8.20


Just Qvigstad
6bu6_dat.png
6BU6: elektron taschenbuch 1952
Heinz Höger

Usage in Models 1= 1946 ; 2= 1951?? ; 5= 1955 ; 4= 1956

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12
 

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