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N709

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ID = 19556
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Vacuum Pentode   Power/Output 
Identical to N709 = 6BQ5 = EL84
Similar Tubes
Other class quality (otherwise equal):
  6BQ5B ; 7189
First year 1953 Tube leaflet collection E.Erb Analysis by original leaflets

Filament Vf 6.3 Volts / If 0.75 Ampere / Indirect / Parallel, (AC/DC) /
Description Output pentode
Launched early 1953; Equivalent type: 6BQ5
Predecessor: EL41
Successor:~ECL86

The very successful EL84 is the last developing step from EL3 via EL41 to the final point of radio output pentodes. It's dissipation power was increased from 9 to 12 watts, giving an output power of 5.7 watts, which was seldom utilized. The sole later launched ECL86 may not be considered as a true successor as it is a multiple beam-power-tube with again only 9 Watts.
[J.R.18Feb2003] 
Text in other languages (may differ)
Literature - - -   
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gb_gec_n709_valve.jpg
N709: H.C.
Howard Craven

 
no20_g_1.gif
N709: RTT Schwandt
Günther Stabe

 

Usage in Models 1= 1955?? ; 5= 1955 ; 1= 1956? ; 7= 1956 ; 1= 1964

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):15

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