3 Vintage GE 5Y3 Rectifier Tubes. Satisfaction Guaranteed.
Made in USA by GE, 1 of them made by RCA (stop sign tube identifier)
2 have black plates, 1 has grey plate
Tested on Precision Apparatus Model 10-12; where the minimum good reading is 54.
Tube#1 = 72/76, Tube#2 = 64/67, Tube#3 = 59/58
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