80 |
1927 |
Common type USA tube/semicond. |
USA |
|
6K7 |
1935 |
Common type USA tube/semicond. |
USA |
|
6K7G |
1935 |
Common type USA tube/semicond. |
USA |
|
6Q7G |
1936 |
Common type Worldwide tube/s... |
ZZ |
|
5U4G |
1936 |
Common type Worldwide tube/s... |
ZZ |
|
5Y3GB |
1937 |
Common type France tube/semi... |
F |
|
6J8G |
1938 |
Common type USA tube/semicond. |
USA |
|
EM4 |
1939 |
Common type Europe tube/semi... |
EU |
|
UCH21 |
1941 |
Philips; Eindhoven (tubes in... |
NL |
|
EF22 |
1941 |
Philips; Eindhoven (tubes in... |
NL |
|
UBL21 |
1941 |
Common type Europe tube/semi... |
EU |
|
EM34 |
1946 |
Common type Europe tube/semi... |
EU |
|
EF41 |
1947 |
Common type Europe tube/semi... |
EU |
|
EL41 |
1947 |
Common type Europe tube/semi... |
EU |
|
AZ41 |
1947 |
Common type Europe tube/semi... |
EU |
|
12AT7 |
1947 |
Common type Worldwide tube/s... |
ZZ |
|
EAF42 |
1948 |
Common type Europe tube/semi... |
EU |
|
ECH42 |
1948 |
Common type Europe tube/semi... |
EU |
|
EZ40 |
1948 |
Common type Europe tube/semi... |
EU |
|
EBC41 |
1949 |
Common type Europe tube/semi... |
EU |
|
EF43 |
1950 |
Common type Europe tube/semi... |
EU |
|
EAA91 |
1951 |
Common type Europe tube/semi... |
EU |
|
ECC81 |
1951 |
Common type Europe tube/semi... |
EU |
|
EABC80 |
1952 |
Common type Europe tube/semi... |
EU |
|
ECH81 |
1952 |
Common type Europe tube/semi... |
EU |
|
EF95 |
1953 |
Mullard Radio Valve Co. Ltd.; |
GB |
|
EL84 |
1953 |
Common type Europe tube/semi... |
EU |
|
EM80 |
1953 |
Common type Europe tube/semi... |
EU |
|
ECC85 |
1953 |
Common type Worldwide tube/s... |
ZZ |
|
ECC83 |
1954 |
Common type Europe tube/semi... |
EU |
|