How hot is too hot?

Posted by vinnie2 (A) on June 2, 2017 at 16:22:14

Got the filaments all burning at about the same brightness on the new 813 amp by changing out one 813, so I guess the one it replaced had a filament with lower resistance and made that side burn brighter. But now it appears there is another issue. I ran the amp for several hours this morning and it just kept sounding better and better, but remembering all the resistors under the hood I decided to see how hot things were getting. After several hours of playing the top plate was too warm to keep your hand on comfortably for more than a few seconds. It has not caused any apparent problems so far, but it makes me wonder; what is the maximum temp the other components under the hood can handle longer term? I did some spot checks of the top plate with my laser thermometer, and it varied from about 110 to 125 degrees F. Definitely hotter than any other amp I have ever built, but I don't know if I have ever seen any numbers on max temps. Anyone out there have data? I don't want to install a fan unless I have to because of the noise. The amp will be only a few feet from my listening position.

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Topic - How hot is too hot? - vinnie2 16:22:14 06/02/17 (24)

Blue ribbon to Ray P - vinnie2 15:25:02 06/03/17 (4)

RE: Blue ribbon to Ray P - RayP 00:07:49 06/04/17 (3)

RE: Blue ribbon to Ray P - vinnie2 04:00:13 06/04/17 (2)

RE: Blue ribbon to Ray P - RayP 04:18:19 06/04/17 (1)

LOL! nt - vinnie2 05:18:23 06/04/17 (0)

RE: How hot is too hot? - Triode_Kingdom 20:54:26 06/02/17 (1)

RE: How hot is too hot? - vinnie2 04:23:11 06/03/17 (0)

RE: I like using door stoppers for equip feet ? - Johno 20:47:57 06/02/17 (1)

RE: I like using door stoppers for equip feet ? - vinnie2 04:18:04 06/03/17 (0)

RE: How hot is too hot? - Eli Duttman 19:46:32 06/02/17 (6)

RE: How hot is too hot? - awkwardbydesign 10:25:32 06/03/17 (0)

RE: How hot is too hot? - krankkall 09:11:56 06/03/17 (0)

cooling - Bill Way 08:42:03 06/03/17 (2)

RE: cooling - vinnie2 09:36:43 06/03/17 (1)

RE: cooling - Bill Way 10:15:51 06/03/17 (0)

RE: How hot is too hot? - vinnie2 04:16:40 06/03/17 (0)

RE: How hot is too hot? - Paul Joppa 19:36:32 06/02/17 (1)

RE: How hot is too hot? - vinnie2 04:15:42 06/03/17 (0)

RE: How hot is too hot? - Chip647 16:46:12 06/02/17 (5)

RE: How hot is too hot? - vinnie2 18:06:18 06/02/17 (0)

I agree making some vents might solve your problem. - 3+4=5 16:57:59 06/02/17 (3)

RE: I agree making some vents might solve your problem. - vinnie2 18:08:20 06/02/17 (2)

RE: I agree making some vents might solve your problem. - RayP 00:28:46 06/03/17 (1)

RE: I agree making some vents might solve your problem. - vinnie2 04:24:41 06/03/17 (0)

How hot is too hot?

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