[TechAssist] Re: Heat sink compound
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 9 Oct 2004 07:57:22 -0500
Heh, I just realized this "Heat Sink" Debate closely mirrors the
Presidential Debates, different camps will put their own spin on the
outcome...
Damon Brunger
Telrad Electronics
Fort Wayne, IN
----- Original Message -----
From: "Edward Gaidies" <teltek3@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, October 09, 2004 7:36 AM
Subject: [TechAssist] Re: Heat sink compound
| 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>
| >>> ---------------------------------------------------------------------
| >>> --
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| >>>>> TTE> -
| >>>>> JS>> ----
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| >>>>>>>>
| >>>>>>>> P> Paul ,B
| >>>>>>>> P> Central TV&Video
| >>>>>>>> P> 911W Grand Ave
| >>>>>>>> P> Grover Beach Ca.
| >>>>>>>> P> (805)481-8084
| >>>>>>>>
| >>>>>>>>
| >>>>>>>>
| >>>>> P>>>
| >>>>> TTE>
| >>>>>
| >>> gjc>
| >>> ---------------------------------------------------------------------
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| >>> ---------------------------------------------------------------------
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| >
| > EG>
| > -----------------------------------------------------------------------
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