This tube has been fully tested and it is free of any leaks, shorts, emissions or quality issues. On a Hickok style Jackson 103 tester the minimum good for each line of a 5U4GB is 25, and both lines tested right at 40 it’s got excellent balance and it’s super strong.
Item Tag: SYLVANIA
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SUPERB SYLVANIA 5U4GB 5AS4A TALL BLACK PLATE TUBE HALO * NEW OLD STOCK IN BOX
Sylvania 5U4GB 5AS4A Vacuum Tube. We also check tubes for shorts and leaks. The integrity of the tube base (when applicable) is also checked to make sure it is not loose or cracked. It has also passed testing for shorts and leaks.
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Tightly Matched Pair 5U4GB/5AS4A Sylvania Vacuum Tubes, Triplett 3444 tested
Triplett tests rectifiers under load (the best test) & indicates whether they test correctly or not – no GM on rectifiers. Test results given are from the 1000 scale for comparison. Tightly Matched Pair.
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NEW SYLVANIA 5U4GB-5AS4A HiFi Ham Radio Amp Vacuum Tube IOB
Tube checked good on a B&K 667 Tube Tester.
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Vintage NEW Sylvania Vacuum Tube Lot 5U4GB 5AS4A 6DW4 6AX4GTB 7JZ8 – RE
Don’t hesitate to ask anything you want to know about the item you’d like to buy. Feel free to ask about ourunlisted inventory, special requests or anything else you’d like to know! Rest assured,what’s pictured is exactly what you will receive, all the photos are of the actual item you’re buying!
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2 1959 NOS NIB MATCHED, BAL 5AS4A 5U4GB Tube Sylvania Black Pl Tested 105% 539B
These 2 Matching 5AS4A / 5U4GB Tubes. Tested 105% of NEW on Hickok 539B. Hickok 539B Tested and. All tubes have been tested and matched on two Hickok Professional Tube Testers. are made by Sylvania (1 Pair).
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Slyvania 5AS4A Full Wave Rectifier Vacc Tube
The Slyvania 5AS4A Full Wave Rectifier Vacuum Tube is a vintage component from the renowned brand SYLVANIA. This rectifier tube, with its specific model number, is designed to provide a full wave rectification function for older audio and video equipment. Perfect for retro audio enthusiasts or collectors looking to restore vintage electronics, this tube is a crucial part of maintaining the authentic sound and performance of classic audio systems. May have shelf wear but is NOS
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NOS SYLVANIA 5U4GB (5AS4A) ZENITH LABEL RECTIFIER VACUUM TUBE TESTED A761.C
NOS SYLVANIA 5U4GB (5AS4A) MADE BY SYLVANIA LABELED FOR ZENITH ORIGINAL BOX INCLUDED MADE IN THE USA VINTAGE STOCK BLACK PLATES HALO GETTER GT TUBE DATE CODE= 3-26 TESTED ON HICKOK TV7 RESULTS= 62/60 MINIMUM= 40/40