3 Vintage CBS labeled 5U4GB Rectifier Tubes. Satisfaction Guaranteed.
Made in USA; 2 by RCA, 1 by GE
Tested strong on Precision Apparatus Model 10-12; where the minimum good reading is 54.
Tube#1 = 80/82, Tube#2 = 70/75, Tube#3 = 58/60
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