[time-nuts] poor-man's oven

[Bruce Griffiths]

Yes, I have a TEC mounted on a convection heatsink that illustrates that point.
Initially ice forms on the cold surface but eventually the heatsink temperature rises sufficiently that the ice melts. A larger blown heatsink or perhaps a water cooled heatsink would be necessary if this setup was intended for anything other than a demonstration of this issue.

Bruce  

> On 05 June 2017 at 13:58 Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> 
> Hi
> 
> Many times people underestimate the amount of heat sinking required with a TEC. If you get into fans, they 
> introduce a whole new set of issues ….It’s not just the heat you are getting out of the “oven”. The TEC it’s self
> makes a pretty good thermal short (compared to foam insulation). You have to “pump” across that as well. 
> 
> Bob
> 
> > On Jun 4, 2017, at 9:38 PM, Ellen Franke <jmfranke at cox.net> wrote:
> > 
> > My concern with using a TEC is that, heating or cooling, you are left with one cold surface and that surface will collect condensation which is a source for corrosion.
> > John WA4WDL
> > 
> > 
> >> On June 4, 2017 at 8:12 PM Attila Kinali <attila at kinali.ch> wrote:
> >> 
> >> 
> >> Moin Chris,
> >> 
> >> On Sun, 4 Jun 2017 13:49:29 -0700
> >> Chris Albertson <albertson.chris at gmail.com> wrote:
> >> 
> >>> We used the pelter because we preferred a cool "oven" to a hot one.   The
> >>> theory has that we get less electronic noise so we ran the TEC in cooling
> >>> mode.   But for your use a resistive heater would be cheaper.   But in
> >>> either case you see a coffee mug with a round chunk of Al shoved in and
> >>> heat sink fins showing.
> >> 
> >> What is the reason why you'd expect less noise with a TEC?
> >> 
> >> 			Attila Kinali
> >> 
> >> -- 
> >> You know, the very powerful and the very stupid have one thing in common.
> >> They don't alters their views to fit the facts, they alter the facts to
> >> fit the views, which can be uncomfortable if you happen to be one of the
> >> facts that needs altering.  -- The Doctor
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