Ok..if Thermal Dissipation is the weekend subject, lets not overindulge. Actually..who cares. Questions on Thermal and Fuse resistors are so available on the internet, we are asking for opinions, not specs. I see by some of the posts...we are asking for consensus.;-) -Ed- ***************************************************************** Ed Gaidies Tel-Tek Electronics Ontario-Canada teltek3@xxxxxxxxxxxx teltek@xxxxxxxxx On 8-Oct-04, at 11:34 PM, walter wood wrote: > Sorry, but I have to say that I find the heat sinks > hotter than the device quite often. > I also have a laser thermometer, and have compiled > some readings for reference. > By the way, It seems that the only thing the laser > does is help you aim it. > When mine is turned on, it will read whether the > trigger(turns on the laser) is squeezed or not. > One can find quite a range of temps inside a TV, > but, I DO believe that a properly working heat sink > will be hotter than the device fastened to it. > At least, behind, and above the device. > For what it's worth!! > Walter > --- gulftech@xxxxxxxx wrote: > >> Come on Bill, >> >> I respect you and very much enjoy your posts. >> But, it is impossible for >> a heat sink to be hotter than the transistor >> attached to it. I have a >> laser thermometer that I use. NEVER have I seen >> the heat sink to be >> hotter than the transistor. After all, where >> does the heat come from? >> >> Plastic transistors are hardest to test, but the >> highest temperature >> measured would be equal to or lower than the >> actual temp. of the >> semiconductor. >> >> >> Ken Smith >> Gulf Technical Services >> 3034 Gulf Breeze Parkway >> Gulf Breeze, FL 32563 >> 850-934-8324 (Voice), 850-932-0819 (fax) >> >> On Fri, 8 Oct 2004 14:00:41 -0700 Bil Green >> <tv.vcrrepair@xxxxxxxxxxx> >> 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> >>> >> > ----------------------------------------------------------------------- > - >>> 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> >>> >> > ----------------------------------------------------------------------- > - >>> 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> >>> >> > ----------------------------------------------------------------------- > - >>> TTE> -- >>> JS>> --- >>>>>> Lost Password: >>>>>> http://www.tech-assist.org and select >> "Login Problems?". >>>>>> Email Archives: >>>>>> >> //www.freelists.org/archives/techassist/ >>> >>> >>> JS>> >>> TTE> >>> >> > ----------------------------------------------------------------------- > - >>> TTE> ----- >>> JS>> Lost Password: >>> JS>> http://www.tech-assist.org and select >> "Login Problems?". >>> JS>> Email Archives: >>> JS>> >> //www.freelists.org/archives/techassist/ >>> >>> >>> TTE> >>> >> > ----------------------------------------------------------------------- > - >>> TTE> ----- >>> TTE> Lost Password: >>> TTE> http://www.tech-assist.org and select >> "Login Problems?". >>> TTE> Email Archives: >>> TTE> >> //www.freelists.org/archives/techassist/ >>> >>> >>> TTE> >>> >> > ----------------------------------------------------------------------- > -- >> ---- >>> TTE> Lost Password: >>> TTE> http://www.tech-assist.org and select >> "Login Problems?". >>> TTE> Email Archives: >>> TTE> >> //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?". >> Email Archives: >> //www.freelists.org/archives/techassist/ >> > > > ===== > Walter Wood > United TV Service > 501 Poplar St. > P.O. box 602 > Pulaski Tn. 38478 > mailto:wwood_38478@xxxxxxxxx > > ----------------------------------------------------------------------- > ------ > 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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