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Subject: Re: [geda-user] handsolder QFN packages
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From: "John Griessen (john AT ecosensory DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Date: Fri, 24 Mar 2017 12:32:14 -0600
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On 03/23/2017 09:13 AM, Frank Miles (fpm AT u DOT washington DOT edu) [via geda-user AT delorie DOT com] wrote:
> If the thermal mass of your aluminum top is low enough it would probably be the
> better choice.  While aluminum has a higher specific heat (absorbing more energy)
> its conductivity is disproportionately greater.

The aluminum one has the lower mass by a good bit, so its thermal mass is going to be the lower of the two.

Next to look at the wattage nameplates.