A quantity of two EF86 high gain pentodes manufactured by Mullard. Fairly clear white print, mesh anodes, same serial prefix 9r2 B1. These valves were tested sometime in the past on a two panel AVO meter for mutual conductance and the following measurements were recorded; 2.2mA/V for the first valve, and 1.2mA/V for the second valve. The AVO manual recommends a figure of 1.8mA/V for a good valve. As found in plain cartons.

See other listings, combined postage normally available dependant on weight, if winning bids placed on other items please do not check out until invoice is received so shipping discount can be applied.

Thanks for looking.