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BH

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ID = 6956
       
Country:
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 ; BH-125 ; GB ; Super-Power_Majestic
Other characteristic (electr. data):
  Z80
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 No heater
Description

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 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 56
70 Years of Radiotubes and V.
  bh_ray_use.png
  BH: Radio News October 1926
Götz Linss
 
bh_2.jpg
BH: Frank Cuffe
Frank Cuffe

 
bh_so.png
BH: ARRL Handbook 1972
Michael Schlör

 
bh.png
BH: Raytheon Databook 1937
Emilio Ciardiello


Usage in Models 2= 1925 ; 1= 1926?? ; 3= 1926? ; 8= 1926 ; 17= 1927 ; 4= 1928 ; 2= 1929?? ; 1= 1929? ; 2= 1930??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):40


Forum contributions about this tube
BH
Threads: 1 | Posts: 1
Hits: 2742     Replies: 0
Raytheon BH rectifier
Götz Linss
23.Nov.09
  1

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  http://www.radiomuseum.org/forum/g132_glimmgleichrichter_roehre.html zu finden.

Grüße G.Linß

Attachments

 
BH
End of forum contributions about this tube

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