| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 110 |  |  |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10 |  |  |   | 
 | CV603 EX610+D3661 | 
 | 
|  | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1005 | Rectifier FW - Gas filled |   |   | 
 | CV2874 VT-195 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 100MD1 | Monitor Diode |   |   | 
 | BS510 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 100MD4 | Monitor Diode |   |   | 
 | BS510 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 100T | Triode |   |   | 
 | CV2550 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 104AC | Pentode | 1931 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10AF/537 |   |   |  | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10C1 | Triode Heptode | 1947 | B8A | 
 | X118 X145 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10C2 | Triode Pentode | 1952 | B8A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10D2 | Double Diode | 1956 | B7G | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10DR7 | Double Triode | 1959 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10E/45 | Rectifier MV |   |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10F3 | Pentode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10FD12 | Double Diode Pentode |   |   | 
 | 19FL8 UBF89 WD119 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10L14 | Double Triode |   |   | 
 | 26AQ8 B109 UCC85 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10LD12 | Triple Diode Triode |   |   | 
 | 28AK8 DH109 UABC80 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10P18 | Pentode | 1958 |   | 
 | 45B5 N119 UL84 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 10PL12 | Triode Pentode |   |   | 
 | 50BM8 LN119 UCL82 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1100 | Beam Tetrode |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 11000 | Pentode |   |   | 
 | CV73 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1129 | Fectifier FW | 1954 | B4 | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 115NO60 | Thermal Delay Switch |   | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1163 |   |   |   | 
 | 68506 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 116Pen | Pentode |   |   | 
 | ARP22 CV1337 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 117L7GT | Rectifier (HW) Beam Tetrode | 1940 |   | 
 | CV2556 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 117M7GT | Rectifier (HW) Beam Tetrode | 1940 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 117N7GT | Diode Tetrode | 1940 | IO | 
 | CV2557 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 117P7GT | Rectifier (HW) Beam Tetrode | 1940 | IO | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 118-0243 | Triode |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 11A1 | Triode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 11AR11 | Double Pentode | 1967 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 11E15 | Tetrode (Power) |   |   | 
 | C1134 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 11E16 | Tetrode (Power) |   |   | 
 | C178A/5894 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 11LT8 | Double Diode Pentode | 1965 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1229 | Electrometer Tetrode | 1965 | UX4 | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 123. | Discharge |   |  | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 123 | Pentode | 1929 |   | 
 | UY224 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1291 | Double Triode | 1949 |   | 
 | 3B7 VT-182 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12A6GT | Output Beam Tetrode | 1946 |   | 
 | CV526 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12A7 | Ouput Pentode Rectifier HW | 1937 | UX7 | 
 | CV909 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AC5 | Pentode | 1947 |   | 
 | 121VP UF41 W142 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AC6 | Pentode |   |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AH8 | Triode Heptode | 1953 | B9A | 
 | 20D3 CV5317 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AL5 | Double Diode | 1947 | B7G | 
 | HAA91 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AV7 | Double Triode | 1949 | B9A | 
 | 6BK7B CV10175 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AX4GT | Efficiency Diode | 1955 | IO | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AX7B | Double Triode |   | B9A | 
 | 12DT7 6057 6L13 B339 CV492 E2162 ECC83 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AX7EH | Double Triode |   | B9A | 
 | 12DT7 6057 6L13 B339 CV492 E2162 ECC83 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AX7WA | Double Triode |   | B9A | 
 | 7025 ECC83 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AX7WC | Double Triode |   | B9A | 
 | 12DT7 6057 6L13 B339 CV492 E2162 ECC83 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AY7 | Double Triode | 1949 | B9A | 
 | 6072A CV3650 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AY7EH | Double Triode |   | B9A | 
 | 6072A | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AZ7 | Double Triode | 1958 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12AZ7A | Double Triode | 1958 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12B8GT | Triode Pentode | 1940 | IO | 
 | CV911 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12BH7A | Double Triode |   | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12BZ7 | Double Triode | 1952 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12C3C | UHF Triode | 1941 |   | 
 | LD1 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12C8 | Double Diode AF Pentode | 1939 |   | 
 | 12C8GT CV531 VT-169 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12C8GT | Double Diode AF Pentode | 1939 |   | 
 | 12C8 CV531 CV3827 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12CR6 | Diode Pentode |   | B7G | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12CS7GT | Double Triode |   |   | 
 | CV3938 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12DE8 | Diode Pentode | 1957 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12DT7 | Double Triode |   |   | 
 | 12AX7 6L13 ECC83 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12E12 | Tetrode (Pulse Amplifier) |   |   | 
 | C1150/1 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12E14 | Beam Tetrode |   |   | 
 | 5B/354D | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12E1C | Beam Tetrode |   |   | 
 | 5B/355D | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12TFK2 |   |   |   | 
 | K3032 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12J5 | Triode |   |   | 
 | CV534 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12J7GT | RF Pentode |   | IO | 
 | CV917 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12S7 | Diode Pentode |   |   | 
 | UAF42 WD142 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12S7WGT | Double Triode |   |   | 
 | CV3983 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SF5GT | Triode | 1940 |   | 
 | CV920 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SF7 | Diode Pentode | 1940 | IO | 
 | CV921 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SF7GT | Diode Pentode | 1946 |   | 
 | CV170 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SH7GT | Pentode | 1945 |   | 
 | CV3651 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SJ7GT | RF Pentode | 1940 |   | 
 | CV698 CV923 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SK7GT | VM RF Pentode | 1940 | IO | 
 | CV544 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SL7GT | Double Triode |   | IO | 
 | CV924 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SN7 | Double Triode |   |   | 
 | B36 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SX7GT | Double Triode |   |   | 
 | CV3697 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12SY7 | Heptode |   |   | 
 | CV3668 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12X825 |   |   |   | 
 | 68510 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 12Y4 | Double Diode | 1944 | B5 | 
 | CV523 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13 | AF Triode | 1926 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13CW4 | Nuvistor Triode | 1964 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13D1 | Double Triode | 1937 |   | 
 | 25SN7 6042 CV423 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13D3 | Double Triode |   | B9A | 
 | CV2212 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13D5 | Double Triode |   |   | 
 | 12AU7 ECC82 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13D7 | Double Triode |   |   | 
 | ECC807 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13D8 | Double Triode |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13D9 | Double Triode |   | B9A | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 13DR7 | Double Triode | 1959 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 141TH | Triode Heptode |   |   | 
 | 14K7 UCH42 X142 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1423 | Thermal Delay Switch |   |  | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14A7/12B7 | Pentode | 1940 |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14D12 | Triode (Power) | 1961 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14D13 | Triode (Power) | 1961 |   | 
 | V1505 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14F7 | Hi-mu Double Triode | 1949 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14GW8 | Triode Pentode |   |   | 
 | PCL86 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14H7 | Vari-μ RF Pentode | 1941 | B8B | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14K7 | Triode Heptode |   | B8A | 
 | 141TH UCH42 X142 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14R7 | Double Diode Pentode | 1951 | B8B | 
 | CV3937 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14S7 | Triode Heptode | 1948 | B8B | 
 | CV3936 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 14Z3 | Rectifier HW |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15. | RF/RCC Triode | 1926 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15 | RF Pentode | 1937 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15E | RF Pentode | 1937 |  | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15CW5 | Pentode |   |   | 
 | 30P18 N379 PL84 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15D12 | Triode (Power) | 1961 |   | 
 | B1153 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15DQ8 | Triode Pentode |   |   | 
 | PCL84 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 15E | Triode | 1940 |  | 
 | 3-15A3 4C30 8033 CV933 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 16 | GP Triode | 1926 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1603 | Pentode |   |   | 
 | CV652 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 160AB22 | Colour TV Picture Tube |   |  | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 161D | Triode |   | L4 | 
 | CV2895 DET1SW | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1611 | Triode |   |   | 
 | CV653 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1612 | Heptode |   |   | 
 | CV654 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1620 | Pentode |   |   | 
 | CV657 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1624 | Beam Tetrode |   |   | 
 | VT-165 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1628 | Triode |   |  | 
 | VT-140 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1630 | Orbital-beam Hexode | 1939 |   | 
 | CV2715 VT-128 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1636 | Beam Deflection Tube | 1943 | IO | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1638 | Double Diode | 1941 | IO | 
 | VR54 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1642 | Double Triode |   |   | 
 | 2C21 CV875 RK33 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1645A | Photocell | 1952 |  | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1650 | Triode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1698 | Monoscope | 1950 |  | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 16A8 | Triode Pentode | 1955 | B9A | 
 | 30PL12 PCL82 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 16D1 | Double Output Triode | 1936 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 16LU8 | Triode Pentode | 1968 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 16LU8A | Triode Pentode | 1968 | B12C | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 17. | Output Triode | 1926 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 17 | Rectifier MV |   |   | 
 | 5557 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1788 | Rectifier MV |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 17BF11 | Double Pentode | 1964 | B12C | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 17C9 | Double Tetrode | 1961 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 17KW6 | Pentode |   |   | 
 | PL508 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 171DDP | Double Diode Pentode |   |   | 
 | UBF80 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18 | Output Pentode | 1937 | UX6 | 
 |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18E | Output Pentode | 1937 | UX6 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18045 | Pentode |   |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18046 | Pentode |   |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18049 |   |   |   | 
 | 2000 68506 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 183/483 | Triode | 1940 |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1846 | Camera Tube (Iconoscope) | 1941 | IO | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1848 | Camera Tube (Iconoscope) |   |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1850A | Camera Tube (Iconoscope) | 1945 | UX6 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1851 | Pentode |   |   | 
 | CV599 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18D3 | Triode Pentode |   |   | 
 | ECF804 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 18GV8 | Triode Pentode |   |   | 
 | PCL85 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19 | Class B Double Triode | 1936 |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1900 |   |   |   | 
 | CV265 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1907 | Thyratron (Hydrogen) |   |   | 
 | CX1140 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1909 | Barretter |   |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 1950-0004 | Reflex Klystron |   |  | 
 | QKK1315 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19D8 | Triode Heptode |   |   | 
 | UCH81 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19D8 | Triode Heptode |   |   | 
 | 10C14 UCH81 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19DR7 | Double Triode | 1959 |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19EA8 | Triode Pentode | 1960 |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19EA8A | Triode Pentode |   |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19FL8 | Double Diode Pentode | 1956 |   | 
 | 10FD12 UBF89 | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19PF1 | Double Pentode | 1964 |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19T8 | Triple Diode Triode |   |   | 
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| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 19X8 | Triode Pentode | 1952 |   | 
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