The M8082 is a special quality audio output valve based on the EL91 design. This exhibit has the new logo the dates it to 1970 or later and was made in Great Britain.
The M series special quality version was optimised for resistance to vibration and to give definable performance under rugged conditions.
For self bias the cathode resistor should be 740 Ohms. The anode load is 16,000 Ohms. An output of 1.4 Watts is possible in a single ended configuration. Distortion figures are 10%. The performance is equal to the commercial EL91.
The M8082/CV4063 is also specified as an HF pentode with useful gain into the low VHF range.