 | OddMix VACUUM TUBE - SUBSTITUTES |
Vacuum Tubes Replacement Substitutions Tables Electronic Radio TV Thermionic Valves
The OddMix Vacuum Tubes Replacement Substitutions Tables section has a wide variety of popular tube substitutions for rare antique, vintage, exotic, original, discontinued and collector's vacuum tubes, electron tubes, audio tubes and Fleming valves. It is quite possible that we have the tubes under a different substitute number. These tables - below - provide a convenient way to check if a given number may be available under a different type number.
Many of these thermionic vacuum devices were made by RCA, GE, Sylvania, Philco, Philips, Tungsram, Valvo and others to be used in radio receivers, transmitters, short wave sets, amateur ham radio, car radios, television sets, audio amplifiers, guitar amplifiers, instruments and special purpose circuits. Even at the earliest of (tube making) times many substitutes existed.
At the hight of the tube era major tube companies used to make - and brand - their "competition's" devices to fool (and defraud) the unsuspecting public. OddMix tubes are all from old inventory original from a bygone era and they are excellent for antique radio and television restoration projects or for setting up a vacuum tube museum.
Good to know, helpful vacuum tube trivia:
These are mostly - but not always - correct (at least for US type numbered tubes);
1. - The first numeral indicates the rounded filament voltage.
2. - The fourth numeral indicates the number of used pins within a tube assembly.
Example: the 6BD11 compactron uses 11 pins - thus can only be successfully substituted with another active 11 pin unit. Beware of substitute types that offer less active contacts than the original!
3. - All numeral tubes are high reliability and/or industrial types, prefered substitutes (when available).
4. - MANY tubes were better made then their counterparts - as brand reputation for some - was more important than to "get rich quick"...
5. - Letters after the fouth numeral either indicate the enclosure type, or used to track the design changes. They do not change the pinout, thus useable for substitution. Example: 6AU6 and 6AU6A are the same tube structurally. Only some electrical parameters are "improved". 6L6 was the original steel enclosed beam power tube. A 6L6 GA, GB, etc. are all fine for substituting.
6. - It takes more time, money and effort to produce a better vacuum, but the result are - better tubes.
Many of these thermionic vacuum devices were made by RCA, GE, Sylvania, Philco, Philips, Tungsram, Valvo and others to be used in radio receivers, transmitters, short wave sets, amateur ham radio, car radios, television sets, audio amplifiers, guitar amplifiers, instruments and special purpose circuits. Even at the earliest of (tube making) times many substitutes existed.
At the hight of the tube era major tube companies used to make - and brand - their "competition's" devices to fool (and defraud) the unsuspecting public. OddMix tubes are all from old inventory original from a bygone era and they are excellent for antique radio and television restoration projects or for setting up a vacuum tube museum.
Good to know, helpful vacuum tube trivia:
These are mostly - but not always - correct (at least for US type numbered tubes);
1. - The first numeral indicates the rounded filament voltage.
2. - The fourth numeral indicates the number of used pins within a tube assembly.
Example: the 6BD11 compactron uses 11 pins - thus can only be successfully substituted with another active 11 pin unit. Beware of substitute types that offer less active contacts than the original!
3. - All numeral tubes are high reliability and/or industrial types, prefered substitutes (when available).
4. - MANY tubes were better made then their counterparts - as brand reputation for some - was more important than to "get rich quick"...
5. - Letters after the fouth numeral either indicate the enclosure type, or used to track the design changes. They do not change the pinout, thus useable for substitution. Example: 6AU6 and 6AU6A are the same tube structurally. Only some electrical parameters are "improved". 6L6 was the original steel enclosed beam power tube. A 6L6 GA, GB, etc. are all fine for substituting.
6. - It takes more time, money and effort to produce a better vacuum, but the result are - better tubes.
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• Items listed are one of a kind, vintage, collector's choice items • First come first served, as supply is extremely limited • • Search the entire OddMix site for other items of interest |
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