This is a used RCA 5U4GB vintage vacuum tube. I tested this on a TV-7D tube tester. This tube tests very good and strong. The min. reading for this tube is 40-40. It tested at 58 and 58. The original “5U4GB” marking is worn off of this tube.
60%
5U4GB vintage Vacuum Audio Tube RCA
Original price was: $17.42.$10.45Current price is: $10.45.
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