What..no debate? I just pulled all my High School Science notes out.;-) -Ed- ***************************************************************** Ed Gaidies Tel-Tek Electronics Ontario-Canada teltek3@xxxxxxxxxxxx teltek@xxxxxxxxx On 9-Oct-04, at 1:33 AM, Bil Green wrote: > I agree. For those who are keeping score, at this time it appears to > be a draw. Heat sinks are never hotter than the device they are > cooling, and then again they are (several replies). > > Thanks for all your input > > > Bil Green > PC 1000 > Mammoth Lakes, CA 93546 > 760-924-1000 > > Friday, October 8, 2004, 9:16:47 PM, you wrote: > > EG> Yes,;-) > > EG> Let it go... > > EG> It's like that question I asked my Secretary. > > > EG> I'm going down the Highway..in my Van. > EG> My speed is 70..Fly comes and sits on my nose,,I keep > swatting...buzzes > EG> around..relands on my nose. > EG> Now..is that fly using gravity..relation to motion..air > relation..?? > EG> Some "Rednecks" will question the "70" for miles or Kms. Never > mind. ;-) > > > EG> -Ed- > EG> ***************************************************************** > EG> Ed Gaidies > EG> Tel-Tek Electronics > EG> Ontario-Canada > EG> teltek3@xxxxxxxxxxxx > EG> teltek@xxxxxxxxx > > EG> On 9-Oct-04, at 12:03 AM, Bil Green wrote: > >>> I am simply reporting what I have noticed when touching the plastic >>> body of the transistor or chip. And another tech mentioned the same >>> thing in his post. >>> >>> When you try to remove a plastic container from a 350 degree oven >>> it doesn't feel anywhere near as hot as a glass container. So maybe >>> the plastic portion of the transistor isn't as hot. >>> >>> I can hold my finger on a hot HOT for a few seconds, but often the >>> heat sink is too hot to even touch. Do you guys think this is just >>> my imagination? >>> >>> >>> >>> Bil Green >>> PC 1000 >>> Mammoth Lakes, CA 93546 >>> 760-924-1000 >>> >>> Friday, October 8, 2004, 7:39:43 PM, you wrote: >>> >>> gjc> Come on Bill, >>> >>> gjc> I respect you and very much enjoy your posts. But, it is >>> impossible for >>> gjc> a heat sink to be hotter than the transistor attached to it. I >>> have a >>> gjc> laser thermometer that I use. NEVER have I seen the heat sink >>> to >>> be >>> gjc> hotter than the transistor. After all, where does the heat come >>> from? >>> >>> gjc> Plastic transistors are hardest to test, but the highest >>> temperature >>> gjc> measured would be equal to or lower than the actual temp. of the >>> gjc> semiconductor. >>> >>> >>> gjc> Ken Smith >>> gjc> Gulf Technical Services >>> gjc> 3034 Gulf Breeze Parkway >>> gjc> Gulf Breeze, FL 32563 >>> gjc> 850-934-8324 (Voice), 850-932-0819 (fax) >>> >>> gjc> On Fri, 8 Oct 2004 14:00:41 -0700 Bil Green >>> <tv.vcrrepair@xxxxxxxxxxx> >>> gjc> writes: >>>>> Actually I'm right. When you place your finger against the plastic >>>>> section of a transistor or IC which is on a heat sink the >>>>> temperature usually feels cooler the heat sink. >>>>> >>>>> You can't place your finger on the rear (often metal) side which is >>>>> against the heat sink (and may be much hotter). >>>>> >>>>> But the heat sink is often hot enough to burn your finger (and >>>>> often the device is definitely NOT). Now maybe the plastic just >>>>> doesn't transfer the heat to your finger very well. I'm don't care >>>>> about science at this point, only what I see or feel. >>>>> >>>>> >>>>> Bil Green >>>>> PC 1000 >>>>> Mammoth Lakes, CA 93546 >>>>> 760-924-1000 >>>>> >>>>> Friday, October 8, 2004, 1:22:50 PM, you wrote: >>>>> >>>>> TTE> Bil... >>>>> TTE> Now you know better then that. >>>>> TTE> Basic Science.;-) >>>>> TTE> That would be Thermal Energy in reverse. The source has to be >>>>> more then >>>>> TTE> the dissipation. >>>>> >>>>> TTE> Ask Wayne.;-) >>>>> >>>>> TTE> -Ed- >>>>> >>>>> TTE> Tel-Tek Electronics >>>>> TTE> Ontario-Canada >>>>> >>>>> TTE> teltek3@xxxxxxxxxxxx >>>>> TTE> teltek@xxxxxxxxx >>>>> >>>>> >>>>> TTE> -----Original Message----- >>>>> TTE> From: techassist-bounce@xxxxxxxxxxxxx >>>>> TTE> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Bil >>>>> Green >>>>> TTE> Sent: Friday, October 08, 2004 3:57 PM >>>>> TTE> To: J Silverman >>>>> TTE> Subject: [TechAssist] Re: Heat sink compound >>>>> >>>>> TTE> Isn't the heat sink always hotter than the device? Heat rises >>>>> and is >>>>> TTE> stored by the heat sink. >>>>> >>>>> >>>>> TTE> Bil Green >>>>> TTE> PC 1000 >>>>> TTE> Mammoth Lakes, CA 93546 >>>>> TTE> 760-924-1000 >>>>> >>>>> TTE> Friday, October 8, 2004, 9:50:46 AM, you wrote: >>>>> >>>>> JS>> So it sucks so much heat out that the heat sink is hotter than >>>>> the >>>>> TTE> devices >>>>> JS>> doing the heating? Patent it quick! >>>>> JS>> Jerry Silverman >>>>> JS>> Greentron Inc >>>>> JS>> 4 Newland Ave >>>>> JS>> Greenville SC 29609 >>>>> JS>> Fax/Phone 864 232 3889 >>>>> JS>> mail to: greentron@xxxxxxx >>>>> JS>> ----- Original Message ----- >>>>> JS>> From: "Bil Green" <tv.vcrrepair@xxxxxxxxxxx> >>>>> JS>> To: "Paul" <techassist@xxxxxxxxxxxxx> >>>>> JS>> Sent: Thursday, October 07, 2004 4:46 PM >>>>> JS>> Subject: [TechAssist] Re: Heat sink compound >>>>> >>>>> >>>>>>>> I have been using silicone grease. It's available in a tube, >>>>> used for >>>>>>>> servicing pools and hot tubs, also boats. Designed for high heat >>>>>>>> applications. Has worked well for many years (and it's clear). >>>>>>>> >>>>>>>> The heat sinks get much hotter than the transistors and chips so >>>>> I >>>>>>>> know for sure that it's working. >>>>>>>> >>>>>>>> >>>>>>>> Bil Green >>>>>>>> PC 1000 >>>>>>>> Mammoth Lakes, CA 93546 >>>>>>>> 760-924-1000 >>>>>>>> >>>>>>>> Thursday, October 7, 2004, 10:10:38 AM, you wrote: >>>>>>>> >>>>>>>> P> Hi Al, been using GC silicone 10-8101 for about 20 years. >>>>> Never >>>>> TTE> had a >>>>> JS>> repeat failure due to its use. I like it because it is less >>>>> messy >>>>> TTE> than the >>>>> JS>> white or pink stuff the mfgs use. >>>>>>>> P> >>>>> JS>> Paul >>>>>>>> P> al m <ampm@xxxxxxx> wrote: >>>>>>>> P> I know it's off topic but I haven't thought of what I was >>>>> buying >>>>> JS>> before. >>>>>>>> P> Which is better the non silicone or the silicone compound? >>>>>>>> P> Al Marquardt >>>>>>>> P> ampm@xxxxxxx >>>>>>>> P> Al Marquardt Electronic Repair >>>>>>>> P> 206 W Main >>>>>>>> P> Girardville Pa. 17935 >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>> P>>> >>>>> TTE> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> - >>>>> TTE> - >>>>> JS>> ---- >>>>>>>> P> Lost Password: >>>>>>>> P> http://www.tech-assist.org and select "Login Problems?". >>>>>>>> P> Email Archives: >>>>>>>> P> //www.freelists.org/archives/techassist/ >>>>>>>> >>>>>>>> >>>>>>>> P> Paul ,B >>>>>>>> P> Central TV&Video >>>>>>>> P> 911W Grand Ave >>>>>>>> P> Grover Beach Ca. >>>>>>>> P> (805)481-8084 >>>>>>>> >>>>>>>> >>>>>>>> >>>>> P>>> >>>>> TTE> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> - >>>>> TTE> - >>>>> JS>> ---- >>>>>>>> P> Lost Password: >>>>>>>> P> http://www.tech-assist.org and select "Login Problems?". >>>>>>>> P> Email Archives: >>>>>>>> P> //www.freelists.org/archives/techassist/ >>>>>>>> >>>>>>>> >>>>>>>> >>>>> TTE> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> - >>>>> TTE> -- >>>>> JS>> --- >>>>>>>> Lost Password: >>>>>>>> http://www.tech-assist.org and select "Login Problems?". >>>>>>>> Email Archives: >>>>>>>> //www.freelists.org/archives/techassist/ >>>>> >>>>> >>>>> JS>> >>>>> TTE> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> - >>>>> TTE> ----- >>>>> JS>> Lost Password: >>>>> JS>> http://www.tech-assist.org and select "Login Problems?". >>>>> JS>> Email Archives: >>>>> JS>> //www.freelists.org/archives/techassist/ >>>>> >>>>> >>>>> TTE> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> - >>>>> TTE> ----- >>>>> TTE> Lost Password: >>>>> TTE> http://www.tech-assist.org and select "Login Problems?". >>>>> TTE> Email Archives: >>>>> TTE> //www.freelists.org/archives/techassist/ >>>>> >>>>> >>>>> TTE> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> -- >>> gjc> ---- >>>>> TTE> Lost Password: >>>>> TTE> http://www.tech-assist.org and select "Login Problems?". >>>>> TTE> Email Archives: >>>>> TTE> //www.freelists.org/archives/techassist/ >>>>> >>>>> >>>>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> -- >>> gjc> ---- >>>>> Lost Password: >>>>> http://www.tech-assist.org and select "Login Problems?". >>>>> Email Archives: >>>>> //www.freelists.org/archives/techassist/ >>>>> >>>>> >>> >>> gjc> >>> --------------------------------------------------------------------- >>> -- >>> ------ >>> gjc> Lost Password: >>> gjc> http://www.tech-assist.org and select "Login Problems?". >>> gjc> Email Archives: >>> gjc> //www.freelists.org/archives/techassist/ >>> >>> >>> --------------------------------------------------------------------- >>> -- >>> ------ >>> Lost Password: >>> http://www.tech-assist.org and select "Login Problems?". >>> Email Archives: >>> //www.freelists.org/archives/techassist/ >>> > > > EG> > ----------------------------------------------------------------------- > ------ > EG> Lost Password: > EG> http://www.tech-assist.org and select "Login Problems?". > EG> Email Archives: > EG> //www.freelists.org/archives/techassist/ > > > ----------------------------------------------------------------------- > ------ > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". 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