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Re: Magnehelic (Mag Tester)

Author: clarnibass
Date: 2022-04-23 13:32

>> Is it possible to use it with an assembled Bb clarinet or bass clarinet or do you have to disassemble it? <<

Sure it's possible. It's just a matter of what you are trying to find out. I assume you mean assembled as in the keys are on it, rather than the sections are assembled for playing (since there's no reason for the latter).

If you want to find where a leak is, then it could be as simple as connecting the magnehelic and pressing various keys, and when you press the leaky key with more force it will seal or leak less. This works sometimes, just depends on what causes the leak and the number and type of leaks.

Disassembling the keys is good for finding where the leak is coming from, adding them one at a time, but there are often ways to find them.

For larger instruments like bass clarinets it's a bit different. Some people even use it on saxophones, but you never get it to read as low as it does on something like a soprano clarinet. Some who use it on saxophones just get the needle to move a little to consider it good. Like it is completely open in a room, it will gradually lose its ability to work the larger the space is.

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