SDS200 It was time!

RandyKuff

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Oct 15, 2015
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775
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Lorain, Ohio
My SDS200 is a little over two months old. Initially I would have to put my ear to the speaker (I use an external) to hear the hum/scanning pulsing noise.
Now I can hear it standing 2 to 3 feet away from it.

So it was time to do some surgery on it. Disassembled the radio and removed the solder mask from the display boards 4 mounting screws. Thanks to
https://forums.radioreference.com/members/staticdischarge.1257298/ for his findings and solution to this problem.

After putting the radio back together (Mitigation part totally removed) all hum and scanning pulse noise is totally gone.

This is what I used to remove the solder mask.




To UNIDEN...
This fix is well documented and it works...
I'm sure the PC boards are done on a CAD/CAM system... What would it take, 5 min to pull back the solder mask from around the display boards 4 mounting screws...
To me thats a cost reduction... NO MITIGATION PART NEEDED...
 

Kaleier1

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Dec 27, 2019
Messages
227
Welcome to the world of humless scanning. I could hear mine from over 6 feet away before I did this fix and it had the mitigation part installed.
 

RandyKuff

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Oct 15, 2015
Messages
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Lorain, Ohio
To me the mitigation part was a band aide... We all know what heppens to them when they age...
Myself, I think it was starting to oxidize causing a resistance build up...
Sure didn't take long for it to start failing though...
 

buddrousa

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Jan 5, 2003
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NW Tenn
 

RandyKuff

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Oct 15, 2015
Messages
775
Location
Lorain, Ohio
How do you remove the screws behind the volume, squelch knobs?

And a small short phillips screw driver to get the front panel off...
 
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