Antique radios, Old Time Radios
		
		
	 
	 
 
     
          
     
	
	
	
	
	HR210_Octron
	
	
	
	
	
	
		
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						| Country: Great Britain (UK) |  |  
						| Identical to | HR210_Octron |  
 
					
					
						
							| Base | Europe 4-Pin B4 (Eu A, E, 4A) 1914 |  
							| Was used by | Radio/TV-reception etc. |  
						| Filament | Vf 1.8 Volts / If 0.1 Ampere /  Direct  /  Battery = |  
							| Description | Rac 77kΩ, Ia 0.85mA, gm 0.21mA/v at Vg=-1.0 and Va=100 This tube had a blue line painted around the bulb. Used as a detector or RCC tride |  
							| Information source | Wireless World (The), London (WW, 79)   Dec 1926 British Radio Valves - The Classic Years: 1926-1946   P. 250 & 331; Supplement, p. 80
 History of the British Radio Valve to 1940
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									|  HR210_Octron: Fin Stewart Fin Stewart
 
 |   Just Qvigstad
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