The Sylvania ECG 5U4GB-5AS4A Electronic Rectifier Vacuum Tube is a vintage electronic component that falls under the category of Vintage Audio & Video and Vintage Electronics. Specifically, this unit is a new old stock (NOS) Philips 5U4GB vacuum tube, designed for use in various electronic devices. As a single unit, this electronic rectifier vacuum tube is a valuable piece for collectors and enthusiasts of vintage audio equipment and consumer electronics.
Item Tag: KEN RAD
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Ken Rad Engraved Type 41 ST Bottle Black Glass Tube 539C Test NOS 🌊
Mutual Conductance (GM)Test: 52.4 ( 51 = NOS AVERAGE & 33 = Good MINIMUM). Test results will vary between testers as it is not an exact science. I also use variac at 120 volts with my testers.
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NOS QUAD (4) KEN RAD 7193 2C22 Black Plate (6J5 6SN7 sub) Vacuum Tubes C.9918
Model 7193. Using as SUB for 6J5G and 6SN7 require the use of an adapter. (ADAPTER NOT INCLUDED). Condition NOS. Plate Black Plate. ALL TUBE AUDIO. Tube Specifications. Tube Type Triode.