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Uniden Tech Support - For discussion of all technical aspects of current or future Uniden scanners.

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Old 06-17-2018, 1:23 PM
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Default sds100 heat

Will the sds100 warmer than usual heat issue,cause premature radio failure ?
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Old 06-17-2018, 1:51 PM
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Only time will tell. The chips on the mainboard appear to be heat sinked to the large metal shield covering a lot of the board, so Uniden seems to have considered the heat issue. No problems so far though, even when running the SDS100 in a hot vehicle.
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Old 06-17-2018, 6:36 PM
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Jon, you had the SDS100 disassembled, and perhaps also will crack open some in the future. Then take a look at the el-lyt capacitors for a temperature marking. That will tell if Uniden have spent the extra money to put high temperature components in the SDS100 or if they use the standard, less expensive alternative that will have a shorter life span.

/Ubbe
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Old 06-17-2018, 7:58 PM
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I took photos while I had it apart:
https://1drv.ms/f/s!ApJIS-l4xqPtgvQQbjn2uujFCymvKw

I don't know if you can read the markings you're referring to, though.
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Old 06-18-2018, 1:31 AM
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As always Jon great mod! That looks nice on the SDS

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Old 06-18-2018, 5:49 AM
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Thank you.
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Old 06-18-2018, 11:16 AM
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Quote:
Originally Posted by jonwienke View Post
I took photos while I had it apart:
https://1drv.ms/f/s!ApJIS-l4xqPtgvQQbjn2uujFCymvKw

I don't know if you can read the markings you're referring to, though.
I was interested in the construction of the selector knob. My knob wobbled on the shaft to the point pushing down to enable volume adjust required much force. I pushed at right angle to the knob to reduce wobble. I was concerned it was a bent shaft. I'm now suspecting knob was canted when installed.

You pictures show what I believe to be robust construction.

Great pictures! Thanks!!!

Mike
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Old 06-18-2018, 2:06 PM
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The SDS's knob feels far more solid than the one on my 436, which has a lot of play in it.

So, it gets warm, but is it hot enough to warrant high temp-rated electrolytics? I suspect Uniden didn't think so.
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Old 06-18-2018, 11:44 PM
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Quote:
Originally Posted by rbrtklamp2 View Post
As always Jon great mod! That looks nice on the SDS

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What was modded?


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Old 06-19-2018, 12:26 AM
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Look at the photos he put a internal GPS Unit in his SDS100. Jon is very talented when it comes to these scanners. He never ceases to amaze me with his modifications .

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Old 06-19-2018, 12:27 AM
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Ok cool! I knew he did some other mods. I just wasnt sure which mod you were pointing out.


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Old 06-23-2018, 2:35 PM
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Default heat

my sds100 gets very Hot on top and antenna connector.
I have the adapter on. anyone else ? upper Body warm but connector area hot
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Old 07-12-2018, 2:40 PM
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My entire SDS100 is warm to the touch, but more so on the top half.
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Old 07-12-2018, 8:16 PM
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Quote:
Originally Posted by sodakney View Post
My entire SDS100 is warm to the touch, but more so on the top half.
The display puts out a lot of heat if you keep it on full time while on external power (like me.) And the SDR tuner and associated CPUs generate more heat than previous scanners. For me, the display is the warmest part / area of the radio, followed by the upper rear / antenna connector. The radio is noticeably warm, but not as warm as my notebook computer, LCD TV, stereo receiver, etc. Devices that consume *a lot* of power will need to dissipate a proportionally greater amount of heat - no getting around physics.
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Old 07-13-2018, 1:13 AM
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I for one welcome the warmth of the radio. I suffer from diabetic neuropathy (nerve damage) in my hands, thus to me, they always feel cold, no matter what the season is. Now I have a handy "hand warmer" whenever I need to warm up the hands. Yeah, I'm weird like that. LOL!!




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Old 07-13-2018, 4:53 AM
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Quote:
Originally Posted by sodakney View Post
My entire SDS100 is warm to the touch, but more so on the top half.
Yep my top half gets really warm when I'm doing NXDN scanning of a local trunk system. There wasn't much voice traffic but it was shockingly warm after about 30 minutes of idle scanning.

Looks like they didn't do much for heat dissipation inside the case. Perhaps a large, thin heat sink would have been a good idea..?
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Old 07-13-2018, 6:27 AM
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As posted here many times the scanner uses over 2 times the power of a 436 BTW my cellphone after 5 minutes of talking or surfing gets as hot as my SDS100
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Old 07-13-2018, 7:17 AM
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Quote:
Originally Posted by buddrousa View Post
As posted here many times the scanner uses over 2 times the power of a 436
More like 4-8x--800mA for the SDS100 (1500mA if charging) vs 200mA for the 436.
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Old 07-13-2018, 7:28 AM
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Quote:
Originally Posted by devicelab View Post
Yep my top half gets really warm when I'm doing NXDN scanning of a local trunk system. There wasn't much voice traffic but it was shockingly warm after about 30 minutes of idle scanning.

Looks like they didn't do much for heat dissipation inside the case. Perhaps a large, thin heat sink would have been a good idea..?
The fact that you are feeling heat is a good thing. Heat generated by the circuitry needs to be conducted away from the radio and wasted to ambient air.
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Old 07-13-2018, 8:57 AM
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I use the BNC adapter with the Remtronix 800 antenna and it seems that most of the heat is drawn up and out of the scanner into the adapter and steel part of the antenna as that gets very warm to hot.
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