Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1930  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1952  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U118  Rectifier HW  1947    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U119  Rectifier HW     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U120/500  Rectifier HW  1930    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1931  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1939  
 AU4 CV1064 CV1796 DW4500 DW4/350 NU3 R4 UU120/350 VU64 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U134  Rectifier 2 x HW  1939    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1931  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1947  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1949    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U145  Rectifier HW  1947    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1950    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1950  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1934    AU12 CV1266 CV3747 NU13 RZ1250 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U15(HV)  Rectifier HW     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U151  Rectifier HW  1952    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U152  Rectifier HW     19X3 PY80 U309 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1953  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U154  Rectifier HW     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1933  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1936  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U18  Rectifier HW  1936  
 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U19/23  Rectifier HW  1948    


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U192  Rectifier HW     19SU 19Y3 PY82 U154 U319 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U193  Rectifier HW  1960  B9A 
 A61 PY801 U349 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U20  Rectifier FW  1939    CV31 FW4800 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U201  Rectifier HW  1948  IO 
 CY31 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U21  Rectifier HW  1937  B4 
 CV3751 SU2150 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U22  Rectifier HW  1939  MO 
 AU8 CV1356 CV1461 CV3750 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U3  Rectifier HW     AU3E27 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U23  Rectifier  1948  B4 
 CV235 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U235  Tungar Rectifier   
 68532 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U24  Rectifier HW  1948  IO 
 CV1921 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U25  Rectifier EHT   
 2L2 KY50 U47 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U251  Efficiency Diode   B9A 
 U329 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U26  Rectifier EHT   B9A 
 2J2 KY80 R20 U49 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U600  Tungar Rectifier   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U27  Rectifier HW     19G/12 2T/360B AU5 CV1111 R11 V1907 VU111 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U281  Efficiency Diode  1950  IO   CY31 OM1 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U282  Efficiency Diode   IO   


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U3  Rectifier HW  1925    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U30  Rectifier FW  1934  B7 
 CV3752 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U30/250  Rectifier HW  1929    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U301  Rectifier HW  1953  IO 
 CY30 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U31  Rectifier HW  1937  IO 
 25Z4 CV3753 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U33  Rectifier EHT   B4   


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U349  Rectifier HW     A61 PY801 U193 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U35  Rectifier EHT   IO   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U37  Rectifier EHT  1950  
 1T2 CV2289 CV4061 R16 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U381  Rectifier HW  1954  B9A 
 38A3 U119 UY85 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U4  Rectifier HW  1926    


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U403  Rectifier HW  1938  MO 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U404  Rectifier HW  1947  B8A 
 U118 U145 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U41  Rectifier EHT  1952  
 1B3GT CV2115 E2004 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U45  Rectifier EHT  1955  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U47  Rectifier EHT     2L2 KY50 U25 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U49  Rectifier EHT     2J2 KY80 R20 U26 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U4B  Rectifier     CV141 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U5  Rectifier FW  1926  B4   CV3743 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U50  Rectifier FW  1937  IO 
 5Y3G 5Y3G/GT CV1268 CV3754 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U54  Rectifier FW  1955  
 53KU GZ33 GZ37 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U6  Rectifier HW     CV3744 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U60  Rectifier EHT   IO   CV4075 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U60/500  Rectifier HW  1930    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U600  Tungar Rectifier  1960    68530 CV3756 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U625  Rectifier HW  1930  B4   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U650  Rectifier HW  1930    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U65/550  Rectifier HW  1929    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U7  Rectifier     CV147 CV149 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U709  Rectifier FW  1953  
 6CA4 CV3996 EZ81 UU12 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U71  Rectifier HW  1939    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U718  Rectifier FW     6BT4 EZ40 U150 UU9 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U75/300  Rectifier HW  1929    



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U8  Rectifier FW  1928  B4   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U801  Rectifier HW  1950  IO   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U81  Rectifier FW  1950  B8B   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U82  Rectifier HW  1948    7Y4 CV3919 U149 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U84  Rectifier FW  1947  B8B   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U9  Rectifier FW  1929    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
U920  Triode  1932  B5 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UA55  Double Beam Tetrode  1947  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UABC80  Triple Diode Triode  1952  B9A 
 10LD12 28AK8 DH109 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UAF42  Diode Pentode  1948  B8A 
 12S7 WD142 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UB41  Double Diode   B8A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UBC41  Double Diode Triode  1949  B8A 
 10LD3 141DDT 14L7 DH118 DH142 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UBC81  Double Diode Triode  1954  B9A 
 10LD13 DH119 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UBF80  Double Diode Pentode  1950  B9A 
 171DDP 17C8 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UBF89  Double Diode Pentode  1956  B9A 
 10FD12 19FL8 WD119 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UBL21  Double Diode Pentode  1941  B8B 
 UBL71 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UC92  Triode  1952  B7G 
 9AB4 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCC84  Double Triode  1954  B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCC85  Double Triode  1954  B9A 
 10L14 26AQ8 B109 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCF80  Triode Pentode  1958  B9A 
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCH21  Triode Heptode  1941  B8B 
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCH81  Triode Heptode  1953  B9A 
 10C14 19D8 X119 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCL81  Triode Pentode  1949    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCL82  Triode Pentode  1956  B9A 
 10PL12 50BM8 LN119 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UCL83  Triode Pentode  1955  B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UD2  Output Triode  1927  B4   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UD4  Output Triode  1927  B4   

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UD41  Triode  1927    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UD41  Voltage Doubler  1937  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UD75  Diode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UE311  Triode     211 242C 4242A CV25 ES85 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UF41  Pentode  1947  B8A 
 121VP 12AC5 W142 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UF42  Pentode  1947  B8A 
 Z142 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UF80  Pentode  1953  B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UF85  Pentode  1954  B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UF86  Pentode  1960  B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UF89  Pentode  1955  B9A 
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UL41  Pentode  1947  B8A 
 451PT 45A5 CV1977 MUL41 N142 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UL42  Pentode  1948    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UL44  Pentode  1948  B8A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UL46  Pentode  1951  B8A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UL84  Pentode  1955  B9A 
 10P18 45B5 N119 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
ULL80  Double Pentode  1959    


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UM4  Tuning Indicator  1940  IO 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UM34  Tuning Indicator  1950  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UM80  Tuning Indicator  1954  B9A 
 19BR5 Y119 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
Universal  Triode  1922  
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
Unknown      

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR1  Rectifier HW  1934  Ct8 
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR2  Rectifier FW  1934  Ct8 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR3  Rectifier FW  1935  Ct8 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR30  Rectifier HW  1963    CV5225 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR3C  Rectifier FW  1935  B7 
 CV3758 PV30 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR40  Rectifier HW  1963    CV5226 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR41  Rectifier HW  1963    CV6092 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR42  Rectifier HW  1963    CV6119 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UR45  Rectifier HW  1963    CV4116 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU10  Rectifier FW   B4   


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU120/250  Rectifier FW     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU120/350  Rectifier FW  1930    CV1796 DW4/350 R4 U12/14 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU2  Rectifier FW  1930  B4   


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU30/250  Rectifier FW  1931    


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU41  Rectifier FW  1930    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU42  Rectifier FW  1934    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU43  Rectifier FW  1934    


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU6  Rectifier FW  1938  MO 
 CV1413 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU7  Rectifier FW  1938  MO 
 CV3761 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UU8  Rectifier FW  1939  MO 
 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UV211  Power Triode  1950  
 211 




Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UVV4A  Photocell     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UX867  Photocell   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UX868  Photocell     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UX112A  Triode  1937  UX4 
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UX222  BiGrid  1927  UX4   222 57T222 CX322 SX222 x222 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UX281  Rectifier HW  1928  UX4   281 AC81 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY227  Triode  1927    127 227 27 427 AY225 AY227 C327 F209A G27 PH227 PU027 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY227  Triode  1927  UY 
 UY227 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY1N  Rectifier HW  1941  IO 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY1NS  Rectifier HW  1957  IO 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY21  Rectifier HW  1941  B8B 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY224  Tetrode  1929  UY   124 224 24 F242 FY224 G24 MY224 PU024 SY224 UY224 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY224  Tetrode  1929    124 224 24 F242 FY224 G24 MY224 PU024 SY224 UY224 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY31  Rectifier HW  1940    


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY85  Rectifier HW  1954  B9A 
 38A3 U119 U381 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
UY89  Rectifier HW  1960  
 
