Thank you. Will look for it here under thermal pad. Bert In a message dated 8/27/2012 8:08:30 A.M. Eastern Daylight Time, azelio.bori...@screen.it writes:
Here in Europe Farnell has the 3M thermal pad in sheets (105x150mm)... On Mon, Aug 27, 2012 at 12:48 PM, ew <ewkeh...@aol.com> wrote: > > Chris > Starting with 3.4 W used by the Tbolt my battery version burns 4.4 W. > Using a switcher do generate 7 V 4.8 W and running the 7805 directly > from 14.5 V 6.2.W. I use like you an IC temp sensor, two stage op amp > driving a fan holding the backplate temp constant and total power goes up > to 7.6 W since the oven has to work harder. T bolt, switchers and all > regulators are on the other side of the 3/32" Alu plate. The AC switcher is > not included in the power numbers. but is also on the plate. Plate is held > at 40 C. > I am looking for a way to more closely couple the Tbolt circuit board to > the back plate and am looking for the material switchers use between > semiconductor and cooling plate Any one know where I can buy it in sheet > form? > Bert Kehren > > > > > -----Original Message----- > From: Chris Albertson <albertson.ch...@gmail.com> > To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > Sent: Sun, Aug 26, 2012 12:31 pm > Subject: Re: [time-nuts] newbie question Thunderbolt supply > > > On Sun, Aug 26, 2012 at 3:46 AM, <ewkeh...@aol.com> wrote: > > Having played with several solutions I found the best is a 12 V 1 A > switcher with the output voltage increased to 15 V, check the capacitors > and if > necessary replace with 25 V. I laid out a PC board that has a TC7662A > inverter followed by a 79L12. Also on the board is a 7812 followed by a > 7805. > Putting them in series gives me good thermal distribution. .... > > ne of the advantages of generating waste heat like that is that you can > ut the heat to good use. I build a temperature controlled fan. It is > ery simple a temperature sensor IC connects to an opamp that drives a > ower transistor that drives a 12V fan. > As for the power supply. I used a filter that does not drop any volts and > can't see any RF on the DC using my old 365 Tek scope or by using a more > ensitive RF power meter. > > hris Albertson > edondo Beach, California > ______________________________________________ > ime-nuts mailing list -- time-nuts@febo.com > o unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > nd 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. _______________________________________________ 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.