Receiving the same transmission / conversation on multiple frequencies

[WSEH675]

Noobie question, and my Google-fu failed to find me an answer. I just need some guidance what to do or what to look for.

I probably messed up my settings but I dont know which one. While monitoring / on stand by, I am receiving the same transmission / conversation on multiple frequeuncies. Example would be while I am RX on 462.650, I am also receiving the same on 462.575. Also, when I am scanning, I can RX the same trnasmission on 446.420 and 448.400 and even at 147.915 (these last three are programmed in consecutive memory channels). This is happening for both BAOFENG and TIDRADIO (I know, I know, but those are the only ones I can afford at the moment). Thanks in advance.

[WRUU653]

1 minute ago, SteveShannon said:

Video record the front of your radio while it’s doing this and post it for us to see. In one case a person had dual watch turned on and had channel B set to the channel that was actually transmitting while he was wondering what was going on with channel A.  

Until you mentioned this I had forgotten of an issue I had once where when I had simultaneous receive turned on and would scan on say the upper section while set to a local repeater on the lower the scanning would stop on a GMRS channel where I would pick up a local medical frequency. I don’t remember the exact combination but it was always a medical response channel coming in on GMRS. Once I turned simultaneous receive off the issue went away. 

[wayoverthere]

Did some digging on the repeaters, and I see a couple possibilities; I suspect the reality is a combination of more than one.  My half educated guesses would be:

First, you may be hearing linked repeaters.  Less likely for the GMRS side now that the rules have been clarified to disallow connections via the internet, but not impossible.  More likely on the ham side; i didn't see any notes or common call signs that would solidify it digging a little on repeaterbook, but there are a few repeaters west and north with matching frequencies.

Second, an unhappy transmitter/amplifier throwing harmonics. that 446 frequency is a bit, but not horribly far off of 3x the 147 frequency.

Third, you have a repeater (or a ham) transmitting close by with a fair bit of power, and it's simply overloading the front end of your radios, so it seems to be bleeding through on other channels it isn't actually on.  While it sounds like they've improved somewhat (varying between models and even examples of the same model), it's still a definite possibility.  (one of my UV5R's will go completely deaf (desense) with as little as 1/2 watt in close proximity, even on a different frequency).

[SteveShannon]

8 hours ago, WSEH675 said:

Noobie question, and my Google-fu failed to find me an answer. I just need some guidance what to do or what to look for.

I probably messed up my settings but I dont know which one. While monitoring / on stand by, I am receiving the same transmission / conversation on multiple frequeuncies. Example would be while I am RX on 462.650, I am also receiving the same on 462.575. Also, when I am scanning, I can RX the same trnasmission on 446.420 and 448.400 and even at 147.915 (these last three are programmed in consecutive memory channels). This is happening for both BAOFENG and TIDRADIO (I know, I know, but those are the only ones I can afford at the moment). Thanks in advance.

Video record the front of your radio while it’s doing this and post it for us to see. In one case a person had dual watch turned on and had channel B set to the channel that was actually transmitting while he was wondering what was going on with channel A.  

[WSEH675]

5 hours ago, WRUU653 said:

Until you mentioned this I had forgotten of an issue I had once where when I had simultaneous receive turned on and would scan on say the upper section while set to a local repeater on the lower the scanning would stop on a GMRS channel where I would pick up a local medical frequency. I don’t remember the exact combination but it was always a medical response channel coming in on GMRS. Once I turned simultaneous receive off the issue went away. 

Not sure if the Baofeng has the simultaneous receive on/off but I will re-read the manual. Thanks.

[WSEH675]

12 hours ago, wayoverthere said:

Did some digging on the repeaters, and I see a couple possibilities; I suspect the reality is a combination of more than one.  My half educated guesses would be:

First, you may be hearing linked repeaters.  Less likely for the GMRS side now that the rules have been clarified to disallow connections via the internet, but not impossible.  More likely on the ham side; i didn't see any notes or common call signs that would solidify it digging a little on repeaterbook, but there are a few repeaters west and north with matching frequencies.

Second, an unhappy transmitter/amplifier throwing harmonics. that 446 frequency is a bit, but not horribly far off of 3x the 147 frequency.

Third, you have a repeater (or a ham) transmitting close by with a fair bit of power, and it's simply overloading the front end of your radios, so it seems to be bleeding through on other channels it isn't actually on.  While it sounds like they've improved somewhat (varying between models and even examples of the same model), it's still a definite possibility.  (one of my UV5R's will go completely deaf (desense) with as little as 1/2 watt in close proximity, even on a different frequency).

Thanks. Will have to read on harmonics.

[OffRoaderX]

1 minute ago, WSEH675 said:

Baofeng has the simultaneous receive on/off but I will re-read the manual

You did not say what model Baofeng you have (they make a LOT of radios), but most Baofeng models do have Simultaneous Receive (TDR) as do most TidRadios.

[WSEH675]

5 hours ago, SteveShannon said:

Video record the front of your radio while it’s doing this and post it for us to see. In one case a person had dual watch turned on and had channel B set to the channel that was actually transmitting while he was wondering what was going on with channel A.  

That might be. Although I doubt it. But nevertheless, I will try and see next time I am monitoring. Just to be sure. I would have to do that after work, unfortunately. Thanks.

[WSEH675]

3 minutes ago, OffRoaderX said:

You did not say what model Baofeng you have (they make a LOT of radios), but most Baofeng models do have Simultaneous Receive (TDR) as do most TidRadios.

Its Baofeng BF-F8HP and Tidradio TD-H3 set as GMRS. The TDR is ON. I didn't realize that's the Simultaneous Receive (the acronym TDR confused me).

[UncleYoda]

4 hours ago, WSEH675 said:

The TDR is ON. I didn't realize that's the Simultaneous Receive (the acronym TDR confused me).

It isn't true simultaneous receive.  It's Dual Watch (Timed? Dual Receive), which alternates checking the two displayed frequencies.  It's good enough for normal people and $30 radios.

[OffRoaderX]

....

Edited February 7 by OffRoaderX
nevermind