NIB GE 5U4GB/5AS4A Rectifier Tube Black Plates STRONG 5U4
Item Tag: 5U4
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1961 RCA 5U4GB Tall Glass Single Mica Rectifier Tube TESTED 5U4 5AS4A
5U4GB/5AS4A Rectifier Tube. Single Mica (at top). Note: There are no markings on this tube except the RCA logo on the glass.
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NIB Matched Pair Sylvania 5U4GB Black Plate Rectifier Tubes TESTED 5U4 5AS4A
(5U4 / 5AS4A). NIB Matched Pair Sylvania 5U4GB Black Plate Rectifier Tubes. Both test 90/90 on my IT-21 tester, where a new tube usually tests 85/85.
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1964 Match Pair GE 5U4GB Side Getter Long Gray Rectifier Tubes TESTED 5U4 5AS4A
Matched Pair GE Clear Top 5U4GB/5AS4A Rectifier Tubes. 1964 date codes. Long Gray Plates.
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NOS GE 5U4GB Clear Top Long Gray Rectifier Tube TESTED 5U4 5AS4A
I was told by my supplier that this tube is NOS but I do see some of the lettering on the tube itself worn off, not sure if due to age or handling, but it tests very strong.