EF93 / 6BA6W (= 5749, CV454, 6K4P-EV) Pentode, NOS
socket: Miniatur-7-pin (B7G, Pico-7)
long-life version (W) has internal connection between cathode (pin 7) and grid-3 (pin 2)
used for example in Hammond M3, Hammond M100 , AIYIMA headphone amps, Stam-Audio STAMCHILD SA-670 studio tube compressor
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