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Random sound (static?) at the end of repeater transmission


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Posted

I'm new to GMRS - have my license and been reading a lot.  Using a KG-805G to hit a local repeater...used it the other day with no issues and made contact with someone 20 or so miles away.

 

I go to use it again today with my family as we are out and about and after releasing the PTT button there's this static like beeping...and apparently the other KG-805G is hearing it as well (along with my transmission).

 

What is this - is it that for some reason we are getting interference today (sunny clear day today vs cloudy the other - if that matters).  Seems to be after every PTT we do, my radio or the others.  I didn't hear it at all the last time.

 

Here's an audio file of it - https://drive.google.com/file/d/11ogM7aOwQTOOYh4GdQVKxK_FfOiBmzZF/view?usp=sharing

Posted

Some repeaters have a "roger beep" or a tone to tell you that your traffic was transmitted and tell others it is clear to talk.

What is likely happening here is a weak signal is triggering the repeater, however the RF signal is so weak that the transmitter is overpowering the signal, causing the receiver to drop out thinking there is no longer a signal. This drops the transmitter, which sends the roger beep. When the transmitter shuts off, the weak signal gets to the receiver again and the whole thing repeats. I wouldn't really call this desense as the signal itself is very week, though it is a similar situation where the transmitter is deafening the receiver.

 

Another cause could be the transmitting radio the other operator is using may have some problem, there could (though not likely) be an issue with the duplexer or antenna, or there some be some RF interference near the repeater site that is causing the repeater to trip.
 

Posted

Normally a repeater has a small squelch or beep on the end. Like WRAK968 said, you might be out of range for the repeater.

I don't believe Tims is out of range, rather another operator who is trying to talk is. Likewise, there could also be an issue with the receiver where it constantly keys after tx, there's a lot that could be going on really. I don't believe Tims is the source cause though.

Posted

The 805 will beep when the battery is low.  

Listening to the soundbite included in the post I can say for sure this is not the case. You can hear it is coming from the repeater as the static at times mixes with the audible beep.

Posted

Listening to the soundbite included in the post I can say for sure this is not the case. You can hear it is coming from the repeater as the static at times mixes with the audible beep.

 

Correct - It's not a low battery on my 805's - they are brand new and just pulled of the charger.

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