Just a sound comparison between a good and a bad preamp tube when the "crackle" effect appears.

This is from a Fender Hot Rod Deluxe whose first stage preamp tube have gone bad and it crackles.

The problem is there with or without signal. For this test, there was no signal applied and the amp was at full volume.

Remember to be carefull with the manipulation of any electronic device as it contais lethal voltages. This is just for educational purposes not intended as an instructional or " how to" video.

Recorded with a Nikon DSLR and a Rhode DSLR Microphone.

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