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In Reply to: RE: Nice pics posted by 17800 on September 30, 2014 at 08:17:39
Charles;
With your particular amp I wouldn't be concerned with heat damaging a solid wood cabinet. If anything I would be more concerned with veneer delamination as a result of excess heat.
I believe you have the same output tube shroud as pictured (Colberanimals).
If so, you can see how the metal shroud would both protect the wood by acting as a heat sync, as well as diverting the heat away and rearward.
The 7189's and the GZ 34 rectifier located in the rear most part of the chassis are responsible for the majority of heat output, while the small signal/driver tubes (12AX7, 7199) in the front of the chassis put out very little heat.
........I was a vegetarian for 15 minutes... until the main course.
Follow Ups:
Here's the deal with the S-5000
Yes, the rectifier and output tubes DO generate the majority of the heat. However, there are two versions of the S-5000, the earlier one which is slightly longer, identifiable by the 12AX7 tubes being mounted at a slant and having individual shields. The later version uses a square cover for the 12AX7s and is slightly shorter. The power transformer is also significantly smaller and can reach 130 degrees even with no cover at all. The older transformer barely gets warm.
If you have the short version, then personally, I wouldn't do anything to add more trapped heat.
my $.02
Mine has the largest transformers and 5 slanted tube in the pre section so it shouldn't be a problem as it was 1st generation. After the bean counters got involved, the transformers got smaller and the pre section had less tubes.
Pox on bean counters!
I was a vegetarian for 15 minutes, until the main course.......Meat; It's the right thing to do. Romans 14:2
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