Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

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I agree making some vents might solve your problem.

Posted by 3+4=5 on June 2, 2017 at 16:57:59:
Another way to make vents is the use a hacksaw and cut several slots on one angle of the bottom, then on the opposite side at the top.
The cross flow will certainly cool it down.
I did this on a headphone amp using (3) 6SN7GT.. IT was much cooler afterwards.
Cutting across the angle makes it easy to do.