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9th September 2011, 02:11 PM
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#1 |
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diyAudio Member
Join Date: Aug 2005
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QQQ (Quick Quad Question...)
Got no experience of owning & running a 405, so....
Just a quicky (!) - What is a reasonable temperature for a Quad 405-2's heatsink to get up to when driven by a 10kHz sine wave at 65W into 8 ohms for, say 20 minutes... No oscillation going on - put it on a spectrum analyser to make sure - clean to 5 MHz. THD+N is at 0.011% - pretty much same on both channels. I'm seeing about 55C on the output transistors - what would people regard as reasonable for this naturally-aspirated (no fan) amp with the lid open? Thanks Nick
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Nicko "The whole plan hinged upon the natural curiosity of potatoes" - S. Lem |
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9th September 2011, 02:18 PM
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#2 |
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diyAudio Member
Join Date: Jan 2004
Location: n.e england
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That would be about right at 55c. Surprised it's not a bit hotter actually after this amp killer of a test...
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Repairs and mods to Real Hi-Fi, guitar amps and P.A. in North East England. http://www.arklesselectronics.com |
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