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Old 02-18-2018, 02:12 PM
init4fun's Avatar
init4fun init4fun is offline
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Ever seen one of these ?

Now I know everybody has seen the version that plugs into 110 and uses a neon light to indicate heater continuity , but this is the first battery powered one I've ever seen . Talk about handy for finding open heater tubes* it's about the size of a pack of cigarettes and doesn't need AC power .

*Yes I do realize that these simple heater checkers only work with the most common heater base pinout tubes (2 & 7 for Octals , 3 & 4 for 7 pin , and so on) and not all tube's heaters can be accurately checked with it . Here you see it indicating heater continuity on a 6AL5 .
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File Type: jpg Tube tester #1.jpg (38.0 KB, 31 views)
File Type: jpg Tube Tester #2.jpg (41.0 KB, 31 views)

Last edited by init4fun; 02-18-2018 at 02:26 PM.
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Old 02-18-2018, 09:59 PM
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MadMan MadMan is offline
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And it'll test picture tubes?

Noice.
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