If it is an investment, any modification from the original
degrade the potential value by a factor >> 1.

I would not do ANY mod on the chassis at all.
What is the temperature inside the enclosure when you
run high power for a while?

My $0.02,
Jean-Paul
N1JPL


> On Apr 9, 2016, at 12:55 PM, V G <veegee@veegee.org> wrote:
>=20
> Hi all,
>=20
> I just bought a very good class A headphone DAC/amp which uses vacuum tub=
es
> (http://www.wooaudio.com/products/wa7fireflies.html). It was an investmen=
t,
> so I'd like to take care of it and maximize the lifespan of all the
> components (I don't mind replacing tubes though).
>=20
> The unit runs warmer than body temperature when idle, and hot when in
> active continuous use which I normally do. There aren't any vent holes in
> the enclosure, so I'm worried that the heat will significantly reduce the
> life of the capacitors and other components inside. Should I open up the
> unit and drill some holes in the back and bottom to improve passive
> cooling? I would mount a DC computer fan, but I'm worried that the
> switching noise will find its way into the amplification path.
>=20
> The power supply also runs hot, but it has vent holes, and resting it on =
a
> computer case fan *significantly* drops its temperature so I'm not worrie=
d
> about the PSU anymore.
>=20
> Any suggestions would be much appreciated, thanks!
> --=20
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> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist

--=20
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View/change your membership options at
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.