| 
				 | 
				 Output triode made by Dutch tube factory Radium 
				(brand name Radio Record) in Tilburg, introduced in 1930   
					
						| Vf | Af | Va | Vg | mAa | ra | g | gm | Pout | Pdiss |  
						| 4 | 0.65 | 250 | -15 | 48 | 2000 | 3.5 | 3.5 | 2 | 12 |    
					
						| Equivalent | 4612, AC044X, AT20,
						D404, DW802,
						KL71403, 
						LA186, 
						LK460, P10,
						P460, RE604, 
						LK600, RO4404 |  |