Offered is a pair of RCA 5751 Twin Triode Tubes. The tubes are clean and in good condition. Each tests good on the Jackson dynamic tester with robust triode readings. The % transconductance readings are as follows: 117%/118% and 125%/125% (the good range is from 70% to 130% on the Jackson). These tubes have short black ribbed plates and top angled getters with all good silver flashing. Likely 1950's vintage. These are 3-Mica types. The printed graphics are worn, one has white lettering and one has red. Pick up these two for your best gear for a nice upgrade. Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.