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Repeater issue

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#1
Hi guys hopefully someone one here can help me. Have a couple radios that we use and the portableshirts work fine, however the mobile has a sound almost like a repeater tail . It does it every few seconds, the portable doesn't have that problem.

Any ideas on what I can do to fix this issue?
They both communicate fine with each other just the mobile gets annoying after a while.
 
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#3
Hi guys hopefully someone one here can help me. Have a couple radios that we use and the portableshirts work fine, however the mobile has a sound almost like a repeater tail . It does it every few seconds, the portable doesn't have that problem.



Any ideas on what I can do to fix this issue?

They both communicate fine with each other just the mobile gets annoying after a while.


What are the make and model numbers of the radios you are using?
 
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#4
I don't think they are I have checked that. Wouldn't that just do it when someone transmits on the mobile? Not every 5 seconds?
Also if it was sending the tones, wouldn't the other radios hear it, not just the mobile?
 
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#5
Finding the types of radios used may help in furthering the reason for the radio's behavior. This is an interesting problem.
 
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#7
...the mobile has a sound almost like a repeater tail . It does it every few seconds, the portable doesn't have that problem...
What exactly is the sound? Does it sound like a burst of white noise like you hear when the squelch is opened with no signal present? We don't know what you think a "repeater tail" sounds like. That could mean different things to different people.
 
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#8
What exactly is the sound? Does it sound like a burst of white noise like you hear when the squelch is opened with no signal present? We don't know what you think a "repeater tail" sounds like. That could mean different things to different people.
Yes that's what it sounds like, I assume it was a repeater tail, as it's the same sound that I get when we key off the mic. My apologies. It's a burst of white noise about a second long and it does it every 5 seconds or so.
 
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#9
So only when your MIC is off-hook, do you hear it ?

Sounds like someone might be running LTR on the same Freq

what is the Location and Freq ??
Yes that's what it sounds like, I assume it was a repeater tail, as it's the same sound that I get when we key off the mic. My apologies. It's a burst of white noise about a second long and it does it every 5 seconds or so.
 
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#10
It sounds like possibly a cheap chinese receiver being desensed by a nearby LTR, GPS RTK or something else that makes transmissions every few seconds, or something like that on your frequency, but it could be something else.

Does this only happen while moving?
 
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#11
So only when your MIC is off-hook, do you hear it ?

Sounds like someone might be running LTR on the same Freq

what is the Location and Freq ??
I'll check the frequency I'm not sure of the top of my head, if it was an LTR issue wouldn't be on all radios not just the mobile. It happens all the time not just when I'm moving.

They are all cheap Chinese radios, so if that's the case the portables should be doing it as well.
 
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#12
It sounds like possibly a cheap chinese receiver being desensed by a nearby LTR, GPS RTK or something else that makes transmissions every few seconds, or something like that on your frequency, but it could be something else.

Does this only happen while moving?
RTK GPS data link transmits roughly every half second, not every few seconds.
 
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#13
Generally Mobiles can hear farther than a portable would

I'll check the frequency I'm not sure of the top of my head, if it was an LTR issue wouldn't be on all radios not just the mobile. It happens all the time not just when I'm moving.

They are all cheap Chinese radios, so if that's the case the portables should be doing it as well.
 
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#14
Generally Mobiles can hear farther than a portable would
I was looking into the issue some more with the portable, If I turn the squelch all the way off I get the issue on the portable as well, so looks like the squelch was turned up on the portable. I'm guessing if I turn the squelch up on the mobile it's would work as well.

Any other ideas on how to silence it?
 

jwt873

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#16
Here are some guesses :)

The Leixen has a 'tail elimination' feature. It's ON by default, but if it got turned to OFF somewhere along the line, you will hear a burst similar to a repeater squelch tail at the end of transmissions.

I don't know about the repeating white noise.. Did a scanning function get turned on inadvertently?
 
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#17
Here are some guesses :)

The Leixen has a 'tail elimination' feature. It's ON by default, but if it got turned to OFF somewhere along the line, you will hear a burst similar to a repeater squelch tail at the end of transmissions.

I don't know about the repeating white noise.. Did a scanning function get turned on inadvertently?
t
Its not at the end of a transmission, it happens while the radio is idle, not transmitting or receiving but waiting for a transmission.
 
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