For sale are these RCA type 1619 vacuum tubes, test solidly in the good and close on our calibrated Jackson 648A tester.  They are the 2.5V heater version of 6L6.  Because 2A3 and type 45 are very expensive and have 2.5V heaters, people often replace those 4 pin sockets with octal sockets and rewire these amps or radios to use 1619's.

price is $10.99 per 1619