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).
Item Tag: 5AS4A
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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 Vacuum Tube Tested on TV-7D/U Tube Tester NOS
RCA 5AS4A Vacuum Tube Tested on TV-7D/U Tube Tester NOS
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General Electric Vintage Vacuum Tube Model 5AS4A Electronic Radio Tube Tested
This vintage vacuum tube from General Electric is a rare find for collectors and enthusiasts of vintage electronics. The model 5AS4A is a testing tube that has been tested to ensure it is in working condition. It is a unit type vacuum tube that was manufactured in the United States and is a great addition to any vintage audio or video collection. The tube is from the brand GE and is a perfect replacement for any old or broken tubes. This vacuum tube is a great investment for those who want to preserve the quality of their vintage electronics.
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NOS Tested 5AS4A/5U4GB Rectifier Tube Strong Dual Diode Vintage Audio Guitar Amp
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.
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Tightly Matched Pair 5AS4A Miniwatt by RCA black plate Tubes Triplett 3444 test
Miniwatt made by RCA. 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.
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2 x 5AS4A Westinghouse Rectifier Tubes *Black Plates*TESTED*NOS*NIB*#10
2 x 5AS4A Westinghouse Rectifier Tubes. NIB – boxes may be tattered. The price is for 2 tubes. Black Plates.
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5AS4A (5U4GB) Vacuum Tubes – Various Brands USA – $12.95/ea (TESTED GUARANTEED)
Picture is representative of one of the boxes of rectifier tubes; note the tube you receive may or may not be shown in the picture; most likely not given the thousands of tubes we have. The testers we use are Phil Frakes’s Bitmatic computerized Cardmatic testers from Tubesontheweb, the specific models are Western Electric KS-15874-L2’s which were made for Western Electric by Hickok; we currently own two of these testers.
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BRAND NEW IN CARTON RAYTHEON 5AS4A / 5U4A BLACK PLATE AUDIO RECTIFIER
Test results must exceed the tester minimums by at least 10%. I attempt to match all the tubes sold in pairs to within 7% of the test readings.