Type 6K6GT vacuum tubes. Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. One PAIR, circa 1954, USA made by GE. <<<<< As pictured = The tubes you see are the tubes you receive.
Vintage RCA Victor 6K6GT 6K6 Vacuum Tube Smoked Glass Radio Hickok Tested Strong
Hickok 800 Test Results See photos for lettering/silkscreen condition. Hickok 800 tested good with no shorts or leaks.
6K6GT NOS Philco radio audio amplifier vintage vacuum tubes 2 valves tested 6K6G
Tubes have black ribbed plates, clear top, bottom side foil getters, tubes tests: 92, 88 %.