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84

Information - Help 
ID = 2862
       
Country:
United States of America (USA)
Brand:
Developer: Sylvania (Hygrade, GTE, Nilco); Emporium (PA) 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 very rare. ***
Identical to 84 = 6Z4 = 6Z4/84 = NU-G84-6Z4 = NU-84 = VT-84 = 84S = ER84 = P864 = CV2548 = 84/6Z4
Similar Tubes
Normally replaceable-slightly different:
  38184
Other class quality (otherwise equal):
  CV619
Heater different:
  84A
Other base:
  7Y4 ; 84M
First Source (s)
Apr.1933 : 70 Years of Radiotubes and V.
1932 : -- Collector info (Sammler)
Successor Tubes 6X5G   6X5   6X5GT   7Y4  
Base UY-Base, 5 Pins (USA, April 1927) (Codex=H)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.5 Ampere / Indirect / Specified voltage AC/DC
Description

60 mA DC at 325 V rms max into capacitive filter up to 40 uF.

* RMA/JEDEC register record available by courtesy of TCA* - This tube was already listed by several manufacturers when RMA started its standardization in 1934. In order to characterize popular receiving types, manufacturers were asked to supply average characteristics as measured on production lots. Here are the filled answer forms supplied by Radio Valve Co., Raytheon, Sparton, Triad, Tung Sol, Ken Rad, Hytron and Arcturus. Full record is downloadable here.

The type 84 tube was originally developed by Sylvania and first marketed by Philco in 1933. It was made with the S12 size bulb, by manufacturers such as Arcturus (with blue glass), Ken-Rad, National Union, Philco, and Sylvania. It was sold originally in March 1933.The companies listed above made the tube with the ST12 bulb and tubes of later manufacture had the double brand 84-6Z4.

 
Dimensions (WHD)
incl. pins / tip		 x 103 x 34 mm / x 4.06 x 1.34 inch
Tube prices 2 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
84.png
84: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
444_4.png 84: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		84_techdat01_1.png
84: Cunningham Radiotron Manual
Peter Hoddow
More ...
Usage in Models 1= 1932?? ; 1= 1932? ; 5= 1933?? ; 34= 1933? ; 41= 1933 ; 24= 1934?? ; 22= 1934? ; 62= 1934 ; 51= 1935?? ; 21= 1935? ; 95= 1935 ; 23= 1936?? ; 29= 1936? ; 121= 1936 ; 20= 1937?? ; 4= 1937? ; 71= 1937 ; 6= 1938?? ; 7= 1938? ; 98= 1938 ; 19= 1939?? ; 16= 1939? ; 32= 1939 ; 4= 1940?? ; 3= 1940? ; 27= 1940 ; 10= 1941?? ; 3= 1941? ; 9= 1941 ; 8= 1942?? ; 2= 1942? ; 1= 1942 ; 1= 1943? ; 4= 1947?? ; 3= 1948?? ; 4= 1950?? ; 1= 1951? ; 4= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):887

Collection of

Jochen Amend (D)
Bruce Morgenstern (CDN)
Christian Schaufelberger (CH)
Hannu Alho (FIN)
Robert Gillespie (USA)
Collection of a member from D
George Papaiz (CDN)
Patrice Zeissloff (F)
Aldo Patriarca (CH)
Collection of a member from FIN
Markus Meier (CH)
Valery Gromov (RUS)
Documents about this component
  RMA qualification record for tube types 76, 77, 78, 6C6, 6D6, 75, 41, 42, 2A5, 85, 6F7, 80, 84 and 6A7. 1569 KB
 
_84_6z4_sylvania.jpg

84
 
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