Vintage 5751 tubes from USA and Europe. These are a slightly lower gain tube that can be used as a replacement for
the 12AX7. 5751 tubes are generally made to industrial standards and are found with both double and triple mica.
Triple mica types tend to be less microphonic.
| Order no. | Tube type and description | Price per tube |
| 5751.001 | G.E. 5751 Double mica five star General Electric tubes | $35.00 |
| 5751.002 | G.E. 5751 Triple mica, grey plate General Electric tubes | $30.00 |
| 5751.003 | G.E. 5751 Double mica standard grey plate General Electric tubes | $25.00 |
| 5751.004 | G.E. 5751 Triple mica, black plate General Electric tubes | $40.00 |
| 5751.005 | Raytheon 5751 Double mica tubes by Raytheon | $25.00 |
| 5751.006 | Raytheon 5751 Triple mica, black plate tubes by Raytheon | $35.00 |
| 5751.007 | Raytheon 5751 Windmill getter tube made by Raytheon | $60.00 |
| 5751.011 | Siemens 5751 Siemens construction tube from Europe | $50.00 |
| 5751.012 | Tung-Sol 5751 Large grey plate Tung-Sol tube | $35.00 |
| 5751.013 | Tung-Sol 5751 Small black plate, double mica Tung-Sol tube | $25.00 |
| 5751.014 | Sylvania 5751 Double mica, grey plate Sylvania tube | $25.00 |
| 5751.015 | Sylvania 5751 Sylvania "Gold Brand" tube | $40.00 |
| 5751.016 | Sylvania 5751 Grey plate, triple mica Sylvania tube | $35.00 |
| 5751.017 | Westinghouse 5751 Triple mica, grey plate Westinghouse tube | $30.00 |
| 5751.018 | RCA 5751 Double mica, black plate RCA tube | $35.00 |
| 5751.019 | RCA 5751 Double mica, grey plate RCA tube | $25.00 |
| 5751.020 | RCA 5751 Triple mica, black plate RCA tube | $45.00 |
| 5751.022 | Sylvania 5751 Black plate, triple mica Sylvania tube | $45.00 |
| 5751.023 | Sylvania 5751 Black plate, double mica Sylvania tube | $30.00 |
| 5751.024 | CBS/Hytron 5751 Triple mica | $30.00 |
| 5751.025 | RCA 5751 Command Series | $75.00 |