[TechAssist] Re: Heat sink compound
- From: Edward Gaidies <teltek3@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 8 Oct 2004 23:28:53 -0400
Ken;
Hard to believe this is still an ongoing subject.
Normally Wayne gives us the "poop"
Guess he's busy with his Chainsaw.
Hang in there..
-Ed-
*****************************************************************
Ed Gaidies
Tel-Tek Electronics
Ontario-Canada
teltek3@xxxxxxxxxxxx
teltek@xxxxxxxxx
On 8-Oct-04, at 10:39 PM, 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>
>>
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>>>>> P> Central TV&Video
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