[TechAssist] Re: Heat sink compound
- From: "George Afana" <grndmstrg@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 9 Oct 2004 18:34:39 -0700
Bil,
Not at all, but not the heat source as I wrote on my last post.
George
Afana Electronics
Moreno Valley, CA
----- Original Message -----
From: "Bil Green" <tv.vcrrepair@xxxxxxxxxxx>
To: "gulftech@xxxxxxxx" <techassist@xxxxxxxxxxxxx>
Sent: Friday, October 08, 2004 9:03 PM
Subject: [TechAssist] Re: Heat sink compound
>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>
>>>
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>>> >>> P> Central TV&Video
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