For sale is Quad of various 6L6 tubes. These tubes are either missing their locating pin or Lettering but still Work! The tubes were tested on a Tripllett 3423 tester for Gm, gas, shorts. All tubes passed on the gas and shorts test.  A Bad  tube will test at 3250gm and a New tube  will test at 5,000gm. Results are Metal 6L6 5,000gm, 6L6GC 5,625gm and the  GA’s are 5,100gm and 4,500gm. I can only guarantee my test results and can't guarantee how the tubes will react in your circuit. Sold As Is and No Returns.