Thoroughly tested on Hickok 539B . Hickok 539B is a mutual conductance (Gm) type tube tester. One tube,circa 1944, U.S.A. made. RCA JAN-CRC-6L6 / VT-115 vacuum tube. <<<<<<< As pictured = The tube you see is the tube you get!
Thoroughly tested on Hickok 539B . Hickok 539B is a mutual conductance (Gm) type tube tester. One tube,circa 1944, U.S.A. made. RCA JAN-CRC-6L6 / VT-115 vacuum tube. <<<<<<< As pictured = The tube you see is the tube you get!