[QUESTION] Amp “glitching”

I have a Supro Blues King 12 that’s about 10 years old, however it’s in very good condition and hadn’t been used very much before I got it about a year ago. Recently, it’s started doing this thing where in random intervals, it will cut out a lot of the high end sound. No settings seems to make a difference, and I’ve tested many different things and it’s definitely a problem with the amp.

What could be wrong?

submitted by /u/MadladMagyar
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