SDS100/SDS200: SDS 100 speaker crackling

[Emoney250]

I apologize if this has been covered already. I monitor an 800 system in Redding, California. I have been since 1990 when they went to 800 trunked. I now have a crackling noise when this system receives audio ON BOTH MY SDS 100 ONLY. I do not get this on my BCD536, or my SDS200. I sent in BOTH my units for repair. They were sent back and STILL do the same thing. I am lost as what to do next.

thanks to all you pros out there.

 

[mciupa]

It sounds like a bad solder connection to the speakers, but it is hard to believe the co-incidence of this happening to both units as well as the repair center missing checking the audio before shipping it back.

 

[tvengr]

I have problems with noise on analog trunked systems on both my SDS100 and SDS200. It appears to be inherent in the design of the SDS Scanners. Same systems sound OK on other scanners.

 

[buddrousa]

Change the AUDIO from NFM to FM on that system or change from FM to NFM and see if it changes.

 

[n1chu]

It sounds like a bad solder connection to the speakers, but it is hard to believe the co-incidence of this happening to both units as well as the repair center missing checking the audio before shipping it back.

Doubtful it’s a bad solder joint on the speaker. If that were the case the crackling would be heard on any audio, regardless of which channel/frequency/TG you listen to. It could be that the SDS models have something like a “birdie” where it’s not as severe enough to cause the scanner to lock, instead, causes degraded reception. Since the problem is not heard on other scanners I suspect it’s inherent only to the SDS models. I wonder if sliding the IF would help?

 

[Ubbe]

I now have a crackling noise when this system receives audio

Did this happen now or have it always been like that?

I take it that it is an analog system, and as it is trunked it is using several voice channels and you have this problem on all channels which then would indicate that it isn't a birdie or interference to a single frequency?

Are you using your scanner with their own antennas or do some, or all, use external antennas?

Are your SDS100's of an early batch where they are using a different SDR receiver compared to SDS200 that uses a more recent SDR receiver chip?

Have you tried using earphones or headphones to check how those sounds and can rule out the internal speakers?

/Ubbe

 

[tvengr]

Are your SDS100's of an early batch where they are using a different SDR receiver compared to SDS200 that uses a more recent SDR receiver chip?

My SDS100 and SDS200's are both early batch.

 

[donc13]

I apologize if this has been covered already. I monitor an 800 system in Redding, California. I have been since 1990 when they went to 800 trunked. I now have a crackling noise when this system receives audio ON BOTH MY SDS 100 ONLY. I do not get this on my BCD536, or my SDS200. I sent in BOTH my units for repair. They were sent back and STILL do the same thing. I am lost as what to do next.

thanks to all you pros out there.

Have you tried any of the filters?

 

[buddrousa]

Doc what I posted is what upman had me try that works.

 

[Emoney250]

Have you tried any of the filters?

I have not because I do not get this issue with my BCD536 or my SDS 200.

 

[Emoney250]

Did this happen now or have it always been like that?

I take it that it is an analog system, and as it is trunked it is using several voice channels and you have this problem on all channels which then would indicate that it isn't a birdie or interference to a single frequency?

Are you using your scanner with their own antennas or do some, or all, use external antennas?

Are your SDS100's of an early batch where they are using a different SDR receiver compared to SDS200 that uses a more recent SDR receiver chip?

Have you tried using earphones or headphones to check how those sounds and can rule out the internal speakers?

/Ubbe

I sent BOTH the SDS 100 to Uniden and they came back NOT fixed. That is unacceptable. If they couldn't fix, they should've replaced them with newer units?

 

[buddrousa]

Did you try the fix I posted?

 

[donc13]

I sent BOTH the SDS 100 to Uniden and they came back NOT fixed. That is unacceptable. If they couldn't fix, they should've replaced them with newer units?

We're they sent in under warranty or were they post warranty? If they were out of warranty, why would you expect them to be replaced with newer units?

There have been several suggestions posted here for you to try, have you tried any of them?

 

[Emoney250]

Since I am not having this issue with my SDS200, and my Sentinel programming is IDENTICAL for all SDS that I own, I logically can rule out that it is a "filter" issue. I am going to e mail Uniden and demand for replacements. They are both still under 1 year warranty.

thanks again people!!!

 

[buddrousa]

It will get repaired but odds are very high it will not be replaced.

 

[donc13]

Since I am not having this issue with my SDS200, and my Sentinel programming is IDENTICAL for all SDS that I own, I logically can rule out that it is a "filter" issue. I am going to e mail Uniden and demand for replacements. They are both still under 1 year warranty.

thanks again people!!!

Thanks for what? You haven't said you have tried anything. The SDS100 is not an SDS200. They are not identical parts and circuits. They may need different settings for things like filters.

It is VERY unlikely they will be replaced but who knows, stranger things have happened.

 

[JoeBearcat]

I sent BOTH the SDS 100 to Uniden and they came back NOT fixed. That is unacceptable. If they couldn't fix, they should've replaced them with newer units?

"not fixed" or "no fix required"? Did they actually say they could not be fixed?

If they are working to spec, they won't replace them.

 

[highwayman1224]

Since I am not having this issue with my SDS200, and my Sentinel programming is IDENTICAL for all SDS that I own, I logically can rule out that it is a "filter" issue. I am going to e mail Uniden and demand for replacements. They are both still under 1 year warranty.

thanks again people!!!

Let us all know how your "demand" goes.... LMAO

 

[natedawg1604]

I sent BOTH the SDS 100 to Uniden and they came back NOT fixed. That is unacceptable. If they couldn't fix, they should've replaced them with newer units?

Three letters: NAS.....

 

[Firefox10]

Did you try the fix I posted?