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Syntor X9000 Low band - Nuisance Noise

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tenthirtyone

Member
Joined
Jul 18, 2006
Messages
8
Location
Cumberland, MD
I am currently using an X9000 low band unit coupled to a Ringo antenna for monitoring low band. It is tuned for the center freq, grounded and has a lightning arrestor in-line with the LMR400 cable. There is some unknown RFI in my neighborhood that washes out much of 30-40 Mhz traffic on a normal scanner. (I know it's not in my house as my patrol vehicle suffers the same condition in the neighborhood.) I've looked but have no idea where it's coming from. Anyway, the X9000 does a good job of working through the noise to pull the signal. The external noise/RFI is a problem, but not the reason for the post.

For the past several months a nuisance noise is occurring from the X9000. I will try to describe it. When the radio is not actively receiving there is the expected amount of soft "white noise" from the receive audio/speaker. However, now when the radio is not actively (ie - no busy light or received voice) receiving there is a variable, low - yet very irritating - amount of soft "popping" or "rustling" sound. It is making me crazy. The radio operates in scan mode normally. As far as I know going to one mode manual or scanning is the same noise when present.

I have taken the chassis apart and checked the boards and connections that I can find. All seem tight and although I don't know what kind of life the radio led before me its chassis and boards are in pretty good shape.

Here is more information to further confuse the issue. When I toggle the volume up and down (with the associated volume "beeep" tone) it will STOP the "popping and rustling" for several days. It then resumes. Crazy. I am just tired of going to the basement where the radio lives and slewing the volume up and down every few days.

I have multiple radios in the house with multiple antennas. They all go to an audio mixer and I have the left and right channels sorted with different jurisdictions. I can hear this rustling noise like nails on a chalkboard when it is present. At night in the headphones it's infuriating. I really don't want to replace the whole radio, but it may come to that.

I have not done anything with the control head - as I don't know what I would.

I have searched the net but found nothing specific other than "wiggle the personality board", etc.

Thanks for reading.
 

jim202

Member
Joined
Mar 7, 2002
Messages
2,670
Location
New Orleans region
I am currently using an X9000 low band unit coupled to a Ringo antenna for monitoring low band. It is tuned for the center freq, grounded and has a lightning arrestor in-line with the LMR400 cable. There is some unknown RFI in my neighborhood that washes out much of 30-40 Mhz traffic on a normal scanner. (I know it's not in my house as my patrol vehicle suffers the same condition in the neighborhood.) I've looked but have no idea where it's coming from. Anyway, the X9000 does a good job of working through the noise to pull the signal. The external noise/RFI is a problem, but not the reason for the post.

For the past several months a nuisance noise is occurring from the X9000. I will try to describe it. When the radio is not actively receiving there is the expected amount of soft "white noise" from the receive audio/speaker. However, now when the radio is not actively (ie - no busy light or received voice) receiving there is a variable, low - yet very irritating - amount of soft "popping" or "rustling" sound. It is making me crazy. The radio operates in scan mode normally. As far as I know going to one mode manual or scanning is the same noise when present.

I have taken the chassis apart and checked the boards and connections that I can find. All seem tight and although I don't know what kind of life the radio led before me its chassis and boards are in pretty good shape.

Here is more information to further confuse the issue. When I toggle the volume up and down (with the associated volume "beeep" tone) it will STOP the "popping and rustling" for several days. It then resumes. Crazy. I am just tired of going to the basement where the radio lives and slewing the volume up and down every few days.

I have multiple radios in the house with multiple antennas. They all go to an audio mixer and I have the left and right channels sorted with different jurisdictions. I can hear this rustling noise like nails on a chalkboard when it is present. At night in the headphones it's infuriating. I really don't want to replace the whole radio, but it may come to that.

I have not done anything with the control head - as I don't know what I would.

I have searched the net but found nothing specific other than "wiggle the personality board", etc.

Thanks for reading.

Have you tried to take the radio out of scan and see if the problem still happens. It may just be a simple matter that the squelch setting is too loose for one of the channels.

Jim
 
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