N/A this tube is tested on the diode scale and has to be past halfway through the red bar of the middle gauge that is red yellow and white to be good and as long as it’s past the green, it’s supposed to be NOS and this is Well into the green.
Item Category: Vintage Electronics
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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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GE 5U4GB / 5AS4A Vacuum Tube STRONG!! (TESTED W/ TV-7D/U)
GE 5U4GB / 5AS4A Vacuum Tube STRONG! (TESTED W/ TV-7D/U).
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1 x 5AS4A Westinghouse Rectifier Tube *Black Plates*TESTED*NOS*NIB*#11
1 x 5AS4A Westinghouse Rectifier Tube. NIB – boxes may be tattered. Black Plates. The price is for 1 tube.
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RCA 5AS4A Vintage Vacuum Rectifier Tube. Tested strong. Used. Reboxed
It is marked “Made in USA” on the glass. It has dark gray plates and a single ‘D’ shaped getter. I warrant the tube to be as described when you receive it.
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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 Vintage NOS General Electric GE 5U4GB 5AS4A Electron Vacuum Tube H8
NEW Vintage NOS General Electric GE 5U4GB 5AS4A Electron Vacuum Tube H8 NEW OLD STOCK