2x MULLARD ECC83 12AX7 Tubes Valves Tested Strong Vintage Audio Preamp

This listing is for two Mullard ECC83 double triode valves, often used in vintage audio preamps and guitar amplifiers.

These valves feature clean, fairly clear yellow print. They are supplied as found in plain cartons and have been dry stored for many years.

This item is listed under the condition "For parts or not working." However, historical test data for these exact valves, conducted on a two-panel AVO valve tester for mutual conductance, is provided for reference only:

• Valve 1 (one section): Tested at 2.1mA/V
• Valve 2 (one section): Tested at 2.0mA/V

For context, the AVO manual indicates a reference figure of 1.6mA/V for an ECC83 valve testing at 100%.