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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 15th Mar 2019, 8:52 am   #21
Radio Wrangler
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Default Re: Cambridge Audio A500

I might play with such an amplifier, but I wouldn't spend any real effort or money on it.

The sanity of anyone who designs an amplifier and puts the heatsinks on the inside ought to be questioned

(Excepting blown tunnel heat sinks)

David
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Old 15th Mar 2019, 10:04 am   #22
Craig Sawyers
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Default Re: Cambridge Audio A500

Heatsinks are often put inboard for safety. First thermal. And secondly sharp edged heatsinks outside. I recently sold an Audiolab 5 channel home theatre amp (I bought two) with all the heatsinks inside.

Inboard heatsinks do need lots of ventilation slots in the casework.
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Old 15th Mar 2019, 10:07 am   #23
Craig Sawyers
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Default Re: Cambridge Audio A500

So why did I have two Audiolab home theatre amps? Well when I went to pick up the one that I'd bought from eBay, the guy said that he had another that didn't work, and would I like it for 50.

Er - yes.

Got it home, and all that was "wrong" was that the "standby" switch on the back panel was in Standby mode! Switched it to continuous operation and it was absolutely perfect!
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Old 15th Mar 2019, 11:21 am   #24
Radio Wrangler
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Default Re: Cambridge Audio A500

No, I definitely like getting the heat outside and using what ventilation can be arranged without creating weak spots or letting extraneous rubbish fall in keep the small signal stuff stay cool.

People often think HP8640b sig gens are faulty. Just where you put your right hand when holding one above the ground, there's a small toggle switch to put the counter freq ref on external... and the counter freezes.

David
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