Welcome to MDB Ventures
Audio Tube Store
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Don't see what you need? Contact us. We have many more tubes that are not yet listed.
We also have new and good used tubes in most other numbers including preoctal, globe/balloon,
octal, loctal, miniature, subminiature, metal, power, transmitter tubes and many more.
MDB Ventures Audio Tubes
Qty
Avail | Tube
Type | Price
Each | Tube
Brand | Emission
Strength | Mutual
Conduct |
Desc |
Notes
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| 1 | 6CA4 | $30.00 | Zenith | 110% / 100% | --- | NOS (OB) | (M9) usa |
| 1 | 6CA4 | $15.00 | Mazda | 100% / 100% | --- | used (rb) | (M9) --- |
| 1 | 6CA4 | $15.00 | Magnavox | 110% / 100% | --- | used (wb) | (M9) usa |
| 1 | 6CA4 | $15.00 | Curtis Mathes | 110% / 100% | --- | used (wb) | (M9) Japan |
| 1 | 6CA4 | $7.50 | unknown | 110% / 90% | --- | used (wb) | (M9) usa |
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| 1 | 6202 / 6X4WA | $7.50 | GE | 120% / 120% | --- | NOS (OB) | (M7) green lettering - special 6X4 - JAN |
| 1 | 6202 / 6X4WA | $7.50 | GE | 120% / 120% | --- | NOS (OB) | (M7) green lettering - special 6X4 - JAN |
| 1 | 6202 / 6X4W | $7.50 | GE | 120% / 110% | --- | NOS (OB) | (M7) white lettering - special 6X4 |
| 1 | 6202 / 6X4WA | $7.50 | Sylvania | 110% / 110% | --- | NOS (OB) | (M7) gold lettering - special 6X4 - FAA |
| 1 | 6X4-WA | $7.50 | GE | 110% / 110% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4WA | $7.50 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) green lettering |
| 1 | 6X4WA | $7.50 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) green lettering |
| 1 | 6X4WA | $7.50 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) green lettering |
| 1 | 6X4WA | $7.50 | Sylvania | 130% / 130% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4WA | $7.50 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) gold lettering |
| 1 | 6202 | $7.50 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering - special 6X4 |
| 1 | 6202 | $7.50 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering - special 6X4 - torn box flap |
| 1 | 6202 | $7.50 | Westinghouse | 120% / 140% | --- | NOS (OB) | (M7) special 6X4 |
| 1 | 6X4W | $7.50 | Raytheon | 130% / 120% | --- | NOS (OB) | (M7) damaged box |
| 1 | 6X4W | $7.50 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) green lettering |
| 1 | 6X4W | $7.50 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) green lettering - damaged box |
| 1 | EZ-90 / 6X4 | $7.50 | International Servicemaster | 120% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 110% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 120% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 120% / 130% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 120% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 110% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 110% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 120% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 120% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 125% / 125% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 120% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 115% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | RCA | 110% / 110% | --- | NOS (wb) | (M7) red lettering |
| 1 | 6X4 | $5.00 | GE | 130% / 130% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | GE | 130% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | GE | 110% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6X4 | $5.00 | Sylvania | 110% / 115% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Rogers | 120% / 120% | --- | NOS (OB) | (M7) torn box flap |
| 1 | 6X4 | $5.00 | Rogers | 120% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Philco | 120% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Philco | 130% / 130% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Delco | 120% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Westinghouse | 110% / 110% | --- | NOS (OB) | (M7) torn box flap |
| 1 | 6X4 | $5.00 | Westinghouse | 130% / 140% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | ITT | 120% / 125% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | ITT | 130% / 130% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Motorola | 130% / 125% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | National Union | 120% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Zenith | 130% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Sylvania | 110% / 110% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Sylvania | 130% / 130% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Sylvania | 130% / 140% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 6X4 | $5.00 | Sylvania | 130% / 130% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | Sylvania | 130% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | Sylvania | 115% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 6X4 | $5.00 | CBS | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Philco | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Western Union | 120% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Conn | 120% / 120% | --- | NOS (OB) | (M7) --- |
| 1 | 6X4 | $5.00 | Simplex | 110% / 120% | --- | NOS (OB) | (M7) damaged box |
| 1 | 6X4 | $2.50 | unknown | 120% / 120% | --- | used (rb) | (M7) black coat |
| 1 | 6202 / 6X4-WA | $2.50 | GE | 100% / 115% | --- | used (wb) | (M9) --- |
| 1 | 6202 / 6X4-WA | $2.50 | GE | 120% / 120% | --- | used (wb) | (M9) green lettering - JAN |
| 1 | 6202 / 6X4-WA | $2.50 | GE | 110% / 110% | --- | used (wb) | (M9) green lettering - JAN |
| 1 | 6202 / 6X4-WA | $2.50 | Westinghouse | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 6X4-WA | $2.50 | Sylvania | 120% / 120% | --- | used (rb) | (M7) green lettering |
| 1 | 6X4-WA | $2.50 | Sylvania | 120% / 120% | --- | used (rb) | (M7) green lettering |
| 1 | 6X4-WA | $2.50 | unknown | 110% / 110% | --- | used (wb) | (M7) --- |
| 1 | 6X4 | $2.50 | GE | 110% / 120% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | Philco | 105% / 110% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 120% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 125% / 130% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 130% / 130% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (rb) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (rb) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA Victor | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | Fisher | 120% / 120% | --- | used (rb) | (M7) made by GE |
| 1 | 6X4 | $2.50 | GE | 115% / 120% | --- | used (rb) | (M7) white lettering |
| 1 | 6X4 | $2.50 | GE | 130% / 130% | --- | used (ob) | (M7) red lettering |
| 1 | 6X4 | $2.50 | GE | 120% / 120% | --- | used (rb) | (M7) red lettering |
| 1 | 6X4 | $2.50 | Sylvania | 120% / 100% | --- | used (rb) | (M7) yellow lettering |
| 1 | 6X4 | $2.50 | Sylvania | 130% / 120% | --- | used (rb) | (M7) yellow lettering |
| 1 | 6X4 | $2.50 | Sylvania | 115% / 100% | --- | used (rb) | (M7) yellow lettering |
| 1 | 6X4 | $2.50 | FoMoCo | 120% / 120% | --- | used (wb) | (M7) --- |
| 1 | 6X4 | $2.50 | Conn | 120% / 120% | --- | used (wb) | (M7) --- |
| 1 | 6X4 | $2.50 | Motorola | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | Raytheon | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | B&K | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | Philco | 130% / 130% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | Shield | 100% / 110% | --- | used (ob) | (M7) --- |
| 1 | 6X4 | $2.50 | Automatic Radio | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | Westinghouse | 120% / 110% | --- | used (OB) | (M7) --- |
| 1 | 6X4 | $2.50 | NEC | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | Philco | 120% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4 | $2.50 | Raytheon | 120% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4W | $2.50 | Raytheon | 130% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4W | $2.50 | Raytheon | 130% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4WA | $2.50 | Sylvania | 120% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4WA | $2.50 | Sylvania | 110% / 110% | --- | used (L) | (M7) --- |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 100% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 115% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) red lettering |
| 1 | 6X4 | $2.50 | RCA | 105% / 110% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 100% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 115% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 110% / 110% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 120% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 130% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 130% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $2.50 | RCA | 115% / 120% | --- | used (L) | (M7) white lettering |
| 1 | 6X4WA | $2.50 | unknown | 110% / 110% | --- | used (L) | (M7) --- |
| 1 | 6X4WA | $2.50 | unknown | 120% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4WA | $2.50 | unknown | 130% / 130% | --- | used (L) | (M7) --- |
| 1 | 6X4W | $2.50 | unknown | 130% / 120% | --- | used (L) | (M7) --- |
| 1 | 6X4 | $2.50 | unknown | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | unknown | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | unknown | 120% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | unknown | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $2.50 | unknown | 110% / 120% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $1.00 | Motorola | 100% / 95% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $1.00 | RCA | 100% / 90% | --- | used (L) | (M7) white lettering |
| 1 | 6X4 | $1.00 | RCA | 90% / 100% | --- | used (rb) | (M7) red lettering |
| 1 | 6X4 | $1.00 | unknown | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 6X4 | $1.00 | unknown | 90% / 100% | --- | used (L) | (M7) --- |
|
| 1 | 6203 | $5.00 | Amperex | 110% / 110% | --- | NOS (OB) | (M7) world logo |
| 1 | 6203 | $5.00 | GE | 110% / 110% | --- | NOS (OB) | (M7) green lettering |
| 1 | 6203 | $5.00 | GE | 110% / 110% | --- | NOS (OB) | (M7) green lettering |
| 1 | 6203 | $5.00 | GE | 110% / 110% | --- | NOS (OB) | (M7) green lettering - missing box flap |
| 1 | 6203 | $5.00 | GE | 110% / 110% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6203 | $5.00 | GE | 110% / 110% | --- | NOS (OB) | (M7) white lettering |
| 1 | 6203 | $2.50 | GE | 110% / 110% | --- | used (rb) | (M7) white lettering - 5 star |
| 1 | 6203 | $2.50 | GE | 110% / 110% | --- | used (rb) | (M7) white lettering - 5 star |
| 1 | 6203 | $2.50 | GE | 100% / 100% | --- | used (rb) | (M7) white lettering - 5 star |
| 1 | 6203 | $2.50 | GE | 110% / 110% | --- | used (L) | (M7) white lettering |
| 1 | 6203 | $2.50 | unknown | 110% / 115% | --- | used (L) | (M7) --- |
| 1 | 6203 | $2.50 | unknown | 105% / 120% | --- | used (L) | (M7) --- |
|
| 1 | 12X4 / HZ90 | $10.00 | Amperex | 110% / 110% | --- | NOS (OB) | (M7) bugle boy |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 120% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 120% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 115% / 120% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 115% / 115% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 110% / 110% | --- | NOS (OB) | (M7) red lettering |
| 1 | 12X4 | $5.00 | RCA | 115% / 115% | --- | NOS (OB) | (M7) white lettering - worn box |
| 1 | 12X4 | $5.00 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 12X4 | $5.00 | GE | 110% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 12X4 | $5.00 | GE | 120% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 12X4 | $5.00 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 12X4 | $5.00 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering - box flap missing |
| 1 | 12X4 | $5.00 | GE | 115% / 115% | --- | NOS (OB) | (M7) white lettering |
| 1 | 12X4 | $5.00 | GE | 115% / 110% | --- | NOS (OB) | (M7) red lettering - water damaged box |
| 1 | 12X4 | $5.00 | GE | 120% / 120% | --- | NOS (OB) | (M7) white lettering |
| 1 | 12X4 | $5.00 | Sylvania | 120% / 120% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 12X4 | $5.00 | Sylvania | 115% / 115% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 12X4 | $5.00 | Sylvania | 115% / 115% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 12X4 | $5.00 | Sylvania | 110% / 110% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 12X4 | $5.00 | Sylvania | 110% / 120% | --- | NOS (OB) | (M7) yellow lettering |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 110% / 105% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 120% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Motorola | 115% / 115% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Dumont | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Zenith | 115% / 115% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | CBS | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | CBS | 120% / 110% | --- | NOS (OB) | (M7) torn box flap |
| 1 | 12X4 | $5.00 | Triad | 120% / 125% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | Westinghouse | 110% / 110% | --- | NOS (OB) | (M7) --- |
| 1 | 12X4 | $5.00 | GE | 110% / 110% | --- | NOS (wb) | (M7) white lettering |
| 1 | 12X4 | $2.50 | Delta | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 12X4 | $2.50 | Automatic Radio | 110% / 110% | --- | used (rb) | (M7) --- |
| 1 | 12X4 | $2.50 | unknown | 110% / 120% | --- | used (rb) | (M7) --- |
| 1 | 12X4 | $2.50 | unknown | 100% / 100% | --- | used (rb) | (M7) --- |
| 1 | 12X4 | $2.50 | unknown | 90% / 100% | --- | used (rb) | (M7) --- |
| 1 | 12X4 | $2.50 | RCA | 110% / 105% | --- | used (OB) | (M7) red lettering |
| 1 | 12X4 | $2.50 | Dynaco | 110% / 105% | --- | used (OB) | (M7) --- |
| 1 | 12X4 | $2.50 | unknown | 110% / 110% | --- | used (OB) | (M7) --- |
| 1 | 12X4 | $2.50 | GE | 120% / 110% | --- | used (ob) | (M7) white lettering |
| 1 | 12X4 | $2.50 | Webcor | 120% / 120% | --- | used (rb) | (M7) --- |
Notes:
(OB) = original box, (rb) = relabeled/replacement box, (wb) = white box,
(L) = loose (no box), (pl) = paper label on tube (original or third party)
(H) = tested on Hickok 539A
(ST)=ST Style, (GT)=GT Style, (TT)=Tall Tubular, (M7)=7pin miniature,
M9=9pin miniature, (SM)=subminiature, JAN = Military
Emission Strength = Percentage of emission measured on Eico 666 tube tester
(Emission Strength = 100% baseline reference, >80%:good, >60%:fair >40%=diode good).
Gm = Mutual conductance measured on Hickok 533 tube tester; Except (H)=tested on Hickok 539A
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).
How To Order:
Purchasing our audio tubes is easy.
Just send us an email indicating the tubes (including quantities) you want.
We will let you know the total price including shipping and handling.
Shipping and Handling Information
Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com
Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.
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Don't forget to visit our
Discount Bargain Packs
and
Bargain Bin
for more savings!
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