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Old 7th September 2012, 09:35 PM   #1
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Default how much clearance above tubes for KT88 enclosure

Hi guys, looking to make a wood enclosure/cover to go over my KT88 amp - top would be slatted with wire mesh to let the heat dissipate. Wondering how much room above the tubes I will safe with - 2"? Thanks for any thoughts.
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Old 7th September 2012, 10:10 PM   #2
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Many commercial tube amps used perf metal that is 1-2" above the tubes. The metal can still get hot and/or cause the paint to discolor over time.

It's really a question of how much temp rise you can stand on the metal...

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Old 9th September 2012, 07:00 PM   #3
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Thanks Bear
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Old 9th September 2012, 07:28 PM   #4
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Distance from tube to tube in the horizontal plane is defined as One and a half 'envelope widths'(1 1/2). If the tubes are of different sizes, take the smallest example times 1.5 .


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