Help with rt 97 GMRS repeater

[WSHB586]

I am very new to GMRS, Today I set up an RT97S GMRS repeater and programed in some squelch tones on repeater channel 15.  I programed the repeater tone into all my other radios and began to test them.   1 of the 8 radios I tested was not working correctly.

The radio is  a BTECH UV 25x4 mobile that I have set up as a portable base station.  I can receive and transmit on all the GMRS channels just fine save for the repeater channels. This is what happens:

 The  UV 25 can receive calls thru the repeater channel just fine, when I transmit from the UV 25 to the rt97 I get the tail squelch indicating that I have connected to the repeater and then it just goes into this looping static buzz. When buzzing the  radio shows that it is receiving at a low signal.

The sound will stop and the channel will reset if I change channels or if I key up the repeater channel from a different radio.

I got this static loop when testing with repeater and mobile in the same house as well as  when I tested them 2 miles apart and got the same noise.  If my TX and RX and + - .5000 offset is incorrect would I still be able to connect with the repeater?  Any insight would be much appreciated!

 

 

 

[LeoG]

32 minutes ago, Socalgmrs said:

I know the cross dresser won’t agree because he like them cheap but toss the retivis in the nearest dumpster.    
 

but I  am confused what is a plus negative .5 offset. 

 

What is it that you do like?

[WSHB586]

I was trying to ask if the repeater would allow the UV 25 to transmit and receive a repeater channel if I had the offset programed wrong?  Sounds like a dumb question now.

[Jaay]

2 hours ago, WSHB586 said:

I was trying to ask if the repeater would allow the UV 25 to transmit and receive a repeater channel if I had the offset programed wrong?  Sounds like a dumb question now.

Not a dumb question at all, just one needing an answer.  All your Gmrs Repeaters will have a 5 mhz. plus input. Hence, +5 Ex; 462.675 for receiving and 467.675 for transmitting. Hope this helps.

[WRTC928]

9 hours ago, Socalgmrs said:

I know the cross dresser won’t agree because he like them cheap but toss the retivis in the nearest dumpster.    

 

Congratulations on the least helpful comment of the week. 

[WSHB586]

Thanks for the response Jay,

So I must have the the repeater Frequency, + .5 offset and tone programmed correctly because I can transmit and receive thru the repeater with the UV 25.  Any idea what could be causing the static loop that occurs after I transmit to the repeater. I can send one transmission and as soon as I release the PTT the static buzzing occurs and the UV 25 display shows a lower power receive signal that is in sync with the noise.  I have tried Transmitting at both high and low power on the UV 25 and I still get the same noise loop after a single transmission?

[SteveShannon]

3 minutes ago, WSHB586 said:

Thanks for the response Jay,

So I must have the the repeater Frequency, + .5 offset and tone programmed correctly because I can transmit and receive thru the repeater with the UV 25.  Any idea what could be causing the static loop that occurs after I transmit to the repeater. I can send one transmission and as soon as I release the PTT the static buzzing occurs and the UV 25 display shows a lower power receive signal that is in sync with the noise.  I have tried Transmitting at both high and low power on the UV 25 and I still get the same noise loop after a single transmission?

Just for the sake of correctness.  It is not + .5 MHz ; it’s + 5.0 MHz. That’s a big difference.

Some repeaters continue to transmit for a short period of time after a person lets up on the PTT. You might be hearing that.

[WSHB586]

8 hours ago, Jaay said:

Not a dumb question at all, just one needing an answer.  All your Gmrs Repeaters will have a 5 mhz. plus input. Hence, +5 Ex; 462.675 for receiving and 467.675 for transmitting. Hope this helps.

 

[WSHB586]

Yes +5. , Thank you for catching that.

The low level signal and noise that begins after releasing the PTT will continue indefinitely until I transmit to the repeater channel with a different radio. The noise is does not sound like  squelch it is more of a buzzing sound.

It only occurs when Transmitting with the UV 25, other radios I have tested do not result in the same feedback loop after transmission.  Thanks

[SteveShannon]

8 minutes ago, WSHB586 said:

Yes +5. , Thank you for catching that.

The low level signal and noise that begins after releasing the PTT will continue indefinitely until I transmit to the repeater channel with a different radio. The noise is does not sound like  squelch it is more of a buzzing sound.

It only occurs when Transmitting with the UV 25, other radios I have tested do not result in the same feedback loop after transmission.  Thanks

I have no idea what that sound may be, but a couple people have experienced something similar in the Radioddity db20g.  Do you think the problem is with the repeater or your radio?  Do you have receive tones (CTCSS or DCS) set in the UV25?

[WSHB586]

I think the problem is with the radio since the other 8 worked well. I will double check the receive tones in the UV 25. Thank you

[WSHB586]

I checked on the receiver tones for the BTECH UV 25, in chirp I have tone mode set to TSQL and the tone squelch set to 67.0. this matches the repeater channel.

It looks like when using TSQL as a tone mode it sets both rx and TX to the same tone squelch. I don't think that the repeater program software will let change the tone mode to DTCS.

[Socalgmrs]

I know the cross dresser won’t agree because he like them cheap but toss the retivis in the nearest dumpster.    
 

but I  am confused what is a plus negative .5 offset. 

1 hour ago, WSHB586 said:

RX and + - .5000 offset