Tung-Sol 6SN7GT VT-231 Dual Triode Valve / Vacuum Tube
A used Tung-Sol 6SN7GT VT-231 dual triode valve in good condition and working order.
Test Results
This valve has been tested on an AVO Mk III valve tester, with both triode sections measured individually for plate current (Ia) and mutual conductance (Gm). The measured readings are shown below alongside the published data book specification.
| Measurement | Data Book Specification | Triode 1 | Triode 2 |
| Plate Current: Ia (mA) | 9.0 | 8.1 | 8.8 |
| Mutual Conductance: Gm (mA/V) | 2.6 | 2.3 | 2.3 |
The valve tests well, with both triode sections giving closely matched readings. Plate current measures 8.1mA and 8.8mA against the data book figure of 9mA, while mutual conductance measures an identical 2.3mA/V on both sections against the data book figure of 2.6mA/V.
The actual readings are provided so that buyers can make their own assessment of the valve's condition and suitability.
Condition
The valve is in good used physical condition for its age. The Tung-Sol, 6SN7GT and VT-231 markings remain visible, as shown in the photographs.
Please study all photographs carefully, as they form an important part of the description and show the actual valve for sale.
Applications
The 6SN7GT is a medium-mu dual triode widely used in vintage audio amplifiers, preamplifiers and other electronic equipment.
Please check compatibility and operating requirements for your particular equipment before purchase.
