You can easily get carried away when trying to test things. For example, if you want to know if your car is working, you could measure the timing of the ignition and put the car on a dynamometer. Or ...
There was a time when people like us might own a tube tester and even if you didn’t, you probably knew which drug store had a tube testing machine you could use for free. We aren’t sure that’s a ...
In August we ran a few photos of Steve Johnson’s excellent collection of radios. This month, we’re tuning in on his tube testers. All information courtesy of Steve’s website. Confidence Special First, ...
Marked: "DAYRAD Tube Checker / Mfd. by the Radio Products Co., Dayton, Ohio. / Licensed Under Weston Patent 1704566 Type B". Includes leather carrying strap. Tube tester designed for A.C. plug in ...
Believe it or not, every Radio Shack – hell, almost every drugstore – once had a tube tester sitting at the back, available for all to use. Pulling a bunch of tubes out of a malfunctioning radio or TV ...
Description (Brief) Marked: "Sterling / R-401 / Vacuum Tube Tester / Serial No. 7661 / The Sterling Mfg. Co., Cleveland, O. U.S.A." Includes original box, instruction sheet, and an instruction label ...
Why you can trust TechRadar We spend hours testing every product or service we review, so you can be sure you’re buying the best. Find out more about how we test. Few areas of hi-fi are as apt for ...
At one time or another, most purchasers, operators and maintainers of closed feedwater heaters ask themselves the following question: “At what wall loss percentage should tubes be plugged to avoid ...