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ID = 6956
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Developer: Raytheon Mfg. Co.; Cambridge, MA 
Tube type:  Full-Wave Cold-cathode-rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to BH = rectifier_kelvin = GH = 57T4635 = 125-BH
Similar Tubes
Normally replaceable-slightly different:
  4621_WLS ; 85mA_Hyvolt ; 85ma ; BH-125 ; EBH ; GB ; Super-Power_Majestic
Other characteristic (electr. data):
Other base and data slightly different:
  G132 ; RGN1500
Differences not known by us:
First year 1925 Models of that date which show in literature 1925.
First Source (s)
Oct.1926 : -- Original prospect or advert
Predecessor Tubes B_Raytheon  

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bk)
Was used by Radio/TV-reception etc.
Filament --/--

The Full-Wave Cold-cathode-rectifier BH from Raytheon was developed for use in B battery eliminators for radio receivers. It handles high peak currents of 80 to 90 ma (up to 125 with a mac. peak plate current of 400 volts) output - but needs proper elimination of RF noise by proper shielding and filtering. See also the "Telefunken" RGN1500 in Germany or the Z80 from Schickerling, USA.

Introduced in 1926, after the introduction of RCA high-power audio triode 199. First advertised in October 1926 on Radio News.

Text in other languages (may differ)
Tube prices 2 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 56
70 Years of Radiotubes and V.

BH: Radio News October 1926
Götz Linss † 27.06.21

bh_so.png BH: ARRL Handbook 1972
Anonymous 10 Collector

More ...

Just Qvigstad
BH: Raytheon Databook 1937
Emilio Ciardiello

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Usage in Models 2= 1925 ; 1= 1926?? ; 3= 1926? ; 8= 1926 ; 19= 1927 ; 1= 1928? ; 7= 1928 ; 2= 1929?? ; 5= 1929? ; 2= 1930?? ; 1= 1932

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):51

Collection of



Forum contributions about this tube
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Raytheon BH rectifier
Götz Linss † 27.06.21

The attached article form "Radio News, October 1926" is an early description of the Raytheon BH gas-filled recifier not requiring a heater.

Für deutschsprachige Leser ist ein enstprechender Artikel aus einer frühen Funkschau (für RM von Herrn Günzel bearbeitet) unter zu finden.

Grüße G.Linß


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