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How to Find Out if an Electronic Tube is Good

How to Find Out if an Electronic Tube is Good

How to Find Out if an Electronic Tube is Good

Electronic tubes are almost completely lost to history and so it the art of telling which one still functions and which one is just a piece of junk.

In general, it’s typically a better idea all around to upgrade to more modern technologies such as digital systems; however, if you’re still interested in finding out how to determine whether or not an electronic tube is still good, check out the brief guide below.

Musical Applications

There once was a time when electron tubes were everywhere, in almost every electronic device and appliance on the market. Nowadays, that’s just not the case. You’re only likely to run into any tubes at all if you’re a musician, particularly a guitarist, looking to buy an amp.

In those situations, you’ll want to know whether or not your amp is any good. To find out, follow the following steps.

Checking an Electron Tube’s Lifespan

First and foremost, you’re going to want to check the tube’s seals. If the sealants have sprung a leak, then they no longer function as they no longer produce the vacuum necessary for the conduction of their electronic mechanisms.

Next, check to see if the tube bears any signs of overheating, such as scorch marks of some kind, as these can be emblematic of damaged tubes.

If you’re looking for more intricate ways of testing electron tubes, you’re going to need to learn more about them in detail.


Still don’t quite have the hang of it? Don’t stress about it! This is almost a completely dead skill to have anyway, since the majority of electronics today don’t even use a single electron tube whatsoever.