Retrevis FRS 22 not talking to other brands

[MJR346]

Had a friend ask me to make his Retrevis rt22frs radios compatible to talk to other brands of radios. I have a TIDradio Bluetooth programmer I use for my own radios and I removed all Tones from all channels. Then decided to test and found that the radio could talk to my uv5r but couldn't hear it back (simplex channel no tones- I'm a licensed user). And then couldn't talk to anyone else's radio till I restored it back to original. Wondering if anyone knows what is up? 

[SteveShannon]

3 hours ago, MJR346 said:

Had a friend ask me to make his Retrevis rt22frs radios compatible to talk to other brands of radios. I have a TIDradio Bluetooth programmer I use for my own radios and I removed all Tones from all channels. Then decided to test and found that the radio could talk to my uv5r but couldn't hear it back (simplex channel no tones- I'm a licensed user). And then couldn't talk to anyone else's radio till I restored it back to original. Wondering if anyone knows what is up? 

The logical assumption is that there’s are CTCSS tones or DTCSS codes somewhere that you don’t realize are there, either on the FRS radio or on your other friends radios, or the radio is transmitting on frequencies the other radios are not receiving. We can’t really know for sure without more information, such as you posting a screenshot, a chirp file, maybe a device like the SW102 showing the output power and actual frequencies of the transmissions that others are not receiving. But we can speculate a bunch:

Bad programming.

Bad firmware.

Both.

But here’s something to try.  When it’s transmitting and other people’s radios don’t seem to receive it, put your UV5R into “scan for tones” mode to see if it’s actually sending with a tone that the other radios filter out. 

[WRUU653]

46 minutes ago, SteveShannon said:

scan for tones” mode to see if it’s actually sending with a tone that the other radios filter out. 

This ^^^

[MJR346]

Thanks for come back, looking at the master copy I kept from his radio, I think i may know, even though most radios have functioned with difference. Had pulled the tones, but forgot to set my radio for narrow band (as I was testing on 462.5625 simplex) and maybe the radio wasn't picking up cause of the wide (even though I have run narrow over a wide repeater a few times) but didn't think about wide over a narrow signal.

BTW this is from the file I took out as base line for the radio before I modified it, and only thing I could see was wide vs narrow.

May have to try again later on again.

Thanks all.. been using my uv5r as a licensed operator for years and gotten very familiar with it, but think I forgot differences. 

Anyway trying to get friend to go GMRS and buy radios where he can get more range for him and his wife so.. 

 

WRQD955

[OffRoaderX]

15 minutes ago, MJR346 said:

Had pulled the tones, but forgot to set my radio for narrow band (as I was testing on 462.5625 simplex) and maybe the radio wasn't picking up cause of the wide (even though I have run narrow over a wide repeater a few times) but didn't think about wide over a narrow signal.

The bandwidth setting has nothing to do with your issue.
Either there are tones on the radio that cannot 'hear', or the two radios are too close to each other when transmitting.