Attila Kinali

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@kinali.ch> wrote: > > > Moin Chris, > > On Sun, 4 Jun 2017 13:49:29 -0700 > Chris Albertson <albertson.chris@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 > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

		Attila Kinali

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@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@kinali.ch> wrote: >> >> >> Moin Chris, >> >> On Sun, 4 Jun 2017 13:49:29 -0700 >> Chris Albertson <albertson.chris@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 >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

		Attila Kinali

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@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@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@kinali.ch> wrote: > >> > >> > >> Moin Chris, > >> > >> On Sun, 4 Jun 2017 13:49:29 -0700 > >> Chris Albertson <albertson.chris@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 > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.