| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6 | GP Triode |  |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  | Double Triode |  |  | 
 |  | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  |  |   |  | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 60 |  |  |   | 
 | 6E5 CV1906 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  | Output Triode |  |  | 
 | CV730 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  |  |  |  | 
 | 6A5 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  | Class B Double Triode |  |  | 
 | CV1867 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  |  |  |  | 
 | CV1870 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  |  |  |  | 
 |  | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6A7S | Heptode (Metalised) |  |   | 
 |  | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  |  |  |  | 
 |  | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
|  |  |  |  | 
 |  | 
 | 
|  | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AB6 | Double Triode | 1936 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AB7 | Pentode | 1941 | IO | 
 | 1853 6AB7/1853 CV661 CV1873 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AB7/1853 | Pentode | 1941 |   | 
 | 6AB7 CV1873 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AC10 | Triple Triode | 1962 | B12C | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AC5 | Triode | 1937 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AC5G | Triode | 1937 |   | 
 | CV844 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AC5GT | Triode | 1940 |   | 
 | CV845 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AD10 | Double Pentode | 1966 | B12C | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AD7G | Triode Pentode | 1940 |   | 
 | CV1878 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AE6G | Twin Anode Triode | 1940 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AE7GT | Twin Input Triode | 1941 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AF4 | UHF Oscillator Triode | 1954 |   | 
 | CV5036 EC94 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AF4A | UHF Oscillator Triode | 1954 | B7G | 
 | 6DZ4 CV5074 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AH7 | Double Triode | 1941 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AN4 | Triode | 1954 |   | 
 | CV3989 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AN8 | Triode Pentode | 1954 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AN8A | Triode Pentode | 1954 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AR7GT | Double Diode Pentode | 1949 | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AR11 | Double Pentode | 1964 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AR8 | Gated Beam Device | 1955 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AS7 | Double Triode | 1946 |   | 
 | 6AS7G | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AU5 | Beam Pentode | 1949 |   | 
 | 6AU5GT | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AU5GT | Beam Pentode | 1949 | IO | 
 | 6AU5 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AU6WB | Pentode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AU7 | Triode | 1960 |   | 
 | CV5052 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AU8 | Triode Pentode | 1953 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6AW8A | Triode Pentode | 1956 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B10 | Double Diode Double Triode | 1961 | B12C | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B4G | Output Triode | 1937 | IO | 
 | CV851 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B5 | Output Double Triode | 1937 |   | 
 | CV1885 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B7 | Double Diode Pentode | 1932 | UX7 | 
 | CV1891 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B7G | Double Diode Pentode | 1937 | UX7 | 
 | CV1890 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B7S | Double Diode Pentode | 1933 | UX7 | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B8 | Double Diode Pentode | 1937 | IO | 
 | CV1894 VT-93 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B8EG | Double Diode VM RF Pentode | 1940 |   | 
 | CV1894 VT-93 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B8G | Double Diode Pentode | 1937 | IO | 
 | 6B8EG CV1893 VT-93A | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6B8GT | Double Diode Pentode | 1937 | IO | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BC4 | Triode |   |   | 
 | CV5038 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BC7 | Triple Diode |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BC8 | Double Triode | 1956 |   | 
 | 6BZ8 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BE7 | Nonode | 1950 |   | 
 | EQ80 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BF11 | Double Pentode | 1964 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BF7 | Rectifier FW |   |   | 
 | CV3894 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BK7B | Double Triode |   |   | 
 | 12AV7 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BL6 | Reflex Klystron |   |  | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BL7 | Double Triode | 1950 |   | 
 | CV5039 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BL7GT | Double Triode | 1950 | IO | 
 | CV5039 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BM6A | Velocity Modulated Valve |   |   | 
 | CV3939 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BN11 | Double Pentode | 1965 | B12C | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BN4 | Triode | 1957 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BN6 | Gated Beam Discriminator | 1965 | B7G | 
 | 6KS6 CV3616 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BQ6G/GT | Pentode |   |   | 
 | CV5040 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BQ7A | Double Triode | 1954 | B9A | 
 | CV5365 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BR6 | Velocity Modulated Valve |   |   | 
 | CV3614 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BR8 | Triode Pentode |   |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BX7GT | Double Triode | 1952 | IO | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6BZ7 | Double Triode | 1956 | B9A | 
 | 6BQ7A 6BS8 6T27 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6C-10 | Triple Triode | 1961 |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6C16 | Triode Pentode |   |   | 
 | 6BL8 CV5215 ECF80 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6C21D | Pencil Triode |   |  | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6C8G | Double Triode | 1937 | IO | 
 | CV1896 VT-163 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6C9 | Triode Heptode | 1948 | B8A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6C9. | Double Tetrode | 1962 |  | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6CA5 | Pentode | 1955 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6CD6G | Line Output Beam Tetrode | 1952 | IO | 
 | CV5729 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6CG7 | Double Triode | 1956 | B9A | 
 | 6CG7EH | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6CM7 | Double Triode | 1955 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6CT7 | Diode Pentode |   |   | 
 | CV3883 EAF42 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6CW7 | Double Triode |   | B9A | 
 | 6L16 ECC84 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6D8G | Heptode | 1937 |   | 
 | CV1902 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DA6 | Pentode |   |   | 
 | CV5156 EF89 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DC8 | Double Diode Pentode |   |   | 
 | 6FD12 EBF89 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DE7 | Double Triode | 1957 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DL4 | Triode |   |   | 
 | EC88 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DR7 | Double Triode | 1959 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DR8 | Double Diode Pentode | 1957 | B9A | 
 | EBF83 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DT6 | Pentode | 1957 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DV4 | Triode Nuvistor |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DX8 | Triode Pentode | 1959 |   | 
 | ECL84 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6DY7 | Double Beam Tetrode | 1958 | IO | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6E6 | Double Triode | 1940 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6E7 | Pentode | 1940 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6EU7 | Double Triode | 1960 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6EV7 | Double Triode | 1960 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F25 | Pentode |   |   | 
 | EF811 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F32 | Pentode (B7G base) | 1953 |   | 
 | 6AK5 6J1P EF95 EP251 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F4 | Triode |   |   | 
 | CV2939 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F5 | High-mu Triode | 1940 | IO | 
 | CV1909 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F5G | High-mu Triode | 1940 |   | 
 | CV1073 CV1908 H63 VT73 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F66 | Tetrode (Power) |   |   | 
 | 6166A CR192A | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F7 | AF Triode Pentode | 1936 | UX7 | 
 | CV1915 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F7B |   | 1940 | UX7 | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F8G | Double Triode | 1943 | IO | 
 | CV1917 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6FD12 | Double Diode Pentode |   |   | 
 | 6DC8 EBF89 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6FD7 | Double Triode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6FL2 | Triode Beam Tetrode | 1970 | B9A | 
 | ECF812 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6F1P | Triode Pentode |   | B9A | 
 | 6Ф1П | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6FQ5A | Triode | 1960 |   | 
 | 6GK5 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6FQ7 | Double Triode | 1965 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6G8G | Double Diode Pentode |   |   | 
 | CV856 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6GE8 | Triode Pentode | 1963 |   | 
 | 7734 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6GF5 | Beam Pentode | 1961 | B12C | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6GK5 | Triode | 1961 |   | 
 | 6FQ5A | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6GU7 | Double Triode | 1963 | B9A | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6GV8 | Triode Pentode |   |   | 
 | ECL85 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6GY8 | Triple Triode | 1962 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H1 | Hexode |   |   | 
 | 6A/203K CV132 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H15N | Double Triode |   | B7G | 
 | 6Н15П 6J6W 6N15 ECC91 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H2P-EB | Double Triode | 1954 |   | 
 | 6H2П-EB 6H2П-EP 6N2P | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H2Pi-EB | Double Triode | 1954 |   | 
 | 6H2П-EB 6H2П-EP | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H6GTY | Double Diode | 1936 | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H7C | Double Triode |   | IO | 
 | 6N7GT CV857 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H8 | Double Diode Pentode | 1939 | IO | 
 | 6H8MG | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H8C | Double Triode |   | IO | 
 | 6SN7GT | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H8MG | Double Diode Pentode | 1939 |   | 
 | 6H8 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6H9C | Double Triode |   | IO | 
 | 6SL7GT | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6HF8 | Triode Pentode | 1961 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6HG8 | Triode Pentode |   |   | 
 | ECF86 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6HU8 | Double Pentode |   |   | 
 | ELL80 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6J11 | Double Pentode | 1961 | B12C | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6J6W | Double Triode | 1957 | B7G | 
 | CV2843 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6J7 | RF Pentode | 1936 | IO | 
 | CV1936 VT-91 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6J8G | Triode Heptode | 1938 | IO | 
 | CV859 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6JH8 | Beam Deflection Tube | 1961 | B9A | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6JS6 | Pentode | 1968 |   | 
 | 6LB6 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6JU8A | Quad Diode | 1962 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6JU8A | Quad Diode | 1964 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6JX8 | Triode Heptode |   |   | 
 | ECH84 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K11 | Triple Triode | 1960 | B12C | 
 | 6Q11 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K5G | High-mu Triode | 1936 | IO | 
 | CV860 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K5GT | High-mu Triode | 1936 | IO | 
 | CV861 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K6G | Output Pentode | 1937 | IO | 
 | CV1938 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K6GT | Output Pentode | 1937 | IO | 
 | CV1940 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K6GT/G | Output Pentode | 1937 |   | 
 | CV1940 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6K7 | VM RF Pentode | 1936 | IO | 
 | CV1942 VT-86 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6KA8 | Triode pentode | 1962 | B9A | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6KS6 | Gated Beam Discriminator | 1965 | B7G | 
 | 6BN6 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L1 | Double Triode | 1951 | B8A | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L13 | Double Triode |   |   | 
 | 12AX7 12DT7 B339 E2164 ECC83 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L16 | Double Triode |   |   | 
 | 6CW7 ECC84 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L19 | Double Triode |   | B8A | 
 | CV1850 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L4 | Triode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L5G | Triode | 1936 |   | 
 | 6L5 CV862 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6EH | Output Beam Tetrode |   |   | 
 | 6L6GC | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6GA | Output Beam Tetrode |   |   | 
 | CV2817 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6GB | Output Beam Tetrode |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6GC | Output Beam Tetrode | 1968 | IO | 
 | 6L6EH | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6GT | Output Beam Tetrode | 1936 | IO | 
 | VT-115B | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6GTY | Output Beam Tetrode | 1946 | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6WGA | Output Beam Tetrode |   |   | 
 | CV3618 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6WGB | Output Beam Tetrode |   |   | 
 | 5881 CV2796 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6L6WGC | Output Beam Tetrode |   |   | 
 | 5881 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6LC8 | Triode Pentode |   |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6LT8 | Double Diode Pentode | 1965 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6LU8 | Triode Pentode | 1967 | B12C | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6M11 | Double Triode Pentode | 1962 | B12C | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6M6 | Pentode | 1940 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6MB8 | Triode Pentode |   | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6NO120 | Thermal Delay Switch |   | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N1P | Double Triode | 1954 | B9A | 
 | 6BQ7A 6H1П-EB 6H1П-EP | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N27P | Double Triode |   | B9A | 
 | ECC86 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N2P | Double Triode | 1954 | B9A | 
 | 6H2П-EB 6H2П-EP | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N2P-EB | Double Triode | 1954 | B9A | 
 | 6H2П-EB 6H2П-EP | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N3P | Double Triode |   | B9A | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N6 | Output Double Triode | 1936 |   | 
 | CV1954 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N6G | Double Triode | 1937 | IO | 
 | CV1953 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N7 | Class B Double Triode | 1936 | IO | 
 | CV1957 VT-96 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N8 | Double Diode Pentode |   |   | 
 | EBF80 WD709 ZD150 ZD152 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6N8P | Double Triode |   |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6P(Gold Line) | Output Triode | 1926 |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6P10 | Repeater Pentode | 1950 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6P12 | Repeater Pentode | 1951 |   | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6P5G | Triode | 1940 |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6P5GT | Triode | 1940 |   | 
 | CV1819 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6P7G | Triode Pentode | 1938 | IO | 
 | CV864 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6Q4 | Triode | 1953 |   | 
 | EC80 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6Q5G | Thyratron |   |   | 
 | 884 CV647 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6R6G | Pentode |   |   | 
 | CV1960 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6S7G | Pentode | 1936 |   | 
 | CV1974 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SA7GT/G | Heptode |   |   | 
 | CV1967 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SC7 | Double Triode | 1938 | IO | 
 | CV1969 VT-105 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SC7GT | Double Triode |   | IO | 
 | CV1970 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SD7GT | Pentode |   |   | 
 | CV865 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SF7 | Diode Pentode | 1940 |   | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SH7 | RF Pentode |   | IO | 
 | 6SH7G 6SH7GT 6SH7L CV594 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SH7G | Pentode |   |   | 
 | 6SH7GT 6SH7L 6SH7 CV5067 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SH7GT | Pentode |   |   | 
 | 6SH7G 6SH7GT 6SH7 CV595 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SH7L | RF Pentode | 1946 | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SJ7 | RF Pentode | 1938 | IO | 
 | 6SJ7Y CV591 VT-116 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SJ7G | Pentode | 1938 |   | 
 | CV590 | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SJ7Y | Pentode |   |   | 
 | 6SJ7 CV591 CV866 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SK7 | VM RF Pentode | 1938 | IO | 
 | CV1981 VT-117 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SN7 | Low-mu Double Triode |   |   | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SN7G | Low-mu Double Triode |   |   | 
 | 13D2 B65 ECC32 | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SN7W | Low-mu Double Triode | 1956 | IO | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6SN7WGT | Low-mu Double Triode | 1956 | IO | 
 | CV3627 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6T35 | Triode (Power) |   |   | 
 | B1153 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6T4 | Triode | 1953 |   | 
 | CV3808 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6U7 | VM RF Pentode | 1936 |   | 
 | 6U7G CV706 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6U7G | VM RF Pentode | 1936 | IO | 
 | 6U7 CV706 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6U8 | Triode Pentode | 1954 | B9A | 
 | 6TP1 CV5065 ECF82 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6U8A | Triode Pentode |   | B9A | 
 |   | 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6V6 | Output Beam Tetrode | 1937 | IO | 
 | CV510 VT-107 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6V9 | Triode Heptode | 1964 | B10B | 
 | ECH200 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6W7G | Pentode |   |   | 
 | CV512 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6X4W | Rectifier FW |   |   | 
 | CV2844 EZ90+C2704 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6X5WGT | Rectifier FW |   |   | 
 | CV3734 | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6X8 | Triode Pentode | 1951 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6X8A | Triode Pentode | 1952 | B9A | 
 |   | 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6Y3G | Rectifier HW |   |   | 
 | CV1816 | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6Y7G | Double Triode (Class B) | 1937 | IO | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6Z7 | Double Triode | 1938 | IO | 
 |   | 
 | 
| 
 | 
| 
 | 
| 
| Type | Structure | Date | Base | PDF | Sensibly equivalent¶ to: |  
| 6Zh43P-E | Double Anode Pentode |   | B9A | 
 | 6Z43PE | 
 | 
| 
 |