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NX-5700 receives, but doesn’t transmit (Analog)

tweiss3

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Verify you didn't flip TX & RX for the amateur repeaters.
 

KR4DWS

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Verify you didn't flip TX & RX for the amateur repeaters.
Aaaaaaaaand now I feel like an idiot… I VFO programmed the Baofeng to the local repeater and now I can hear it from the Kenwood. Holy moly… well, I acquired some cool equipment in the process
 

tweiss3

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Aaaaaaaaand now I feel like an idiot… I VFO programmed the Baofeng to the local repeater and now I can hear it from the Kenwood. Holy moly… well, I acquired some cool equipment in the process
Don't worry, it happens. I've done it more than once.
 

KR4DWS

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Don't worry, it happens. I've done it more than once.
Hold up… false alarm. I figured out what I did. All I did was program the output frequency of the repeater. (Reversed the frequencies) and that’s why I heard it. So still having the same problem. I figured out the 2m Call problem. The Baofeng had put a PL tone on the frequency. Took it off and now simplex does work. The repeater problem is still an anomaly.

On the plus side, it’s not a hardware issue since it does receive and broadcast on simplex
 
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AM909

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Time to reset. What exactly is "the repeater problem"? Be as specific as possible. Remember that any receiver near a transmitting antenna can experience some level of desensitization, depeding on transmit power level and separation in both frequency and distance. Transmitting with mobile power levels (25-100W) only 600 kHz and a few feet away from a CCR, or even some commercial-grade radios, can cause that receiving radio to fail.
 

KR4DWS

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Time to reset. What exactly is "the repeater problem"? Be as specific as possible. Remember that any receiver near a transmitting antenna can experience some level of desensitization, depeding on transmit power level and separation in both frequency and distance. Transmitting with mobile power levels (25-100W) only 600 kHz and a few feet away from a CCR, or even some commercial-grade radios, can cause that receiving radio to fail.
Well, initially it was a “not being able to transmit problem” on both repeater and simplex. The simplex problem was figured out and ruled operator error today. So I’m able to transmit and receive on 2m FM Call. It was initially thought a coax or an antenna problem. Those were also ruled out with some diagnostic work today as well. Now the issue lies in the fact that I can hear my local ham repeater, but I cannot transmit. I’ve looked at the codeplug numerous times and matched it up with the frequencies and the PL tones. The programming should be in order. When I key up, I get the red indicator light, indicating that I’m transmitting, and when I let off the mic, I get a small flash of the green indicator light and then it goes off. I’m using a Baofeng portable to see if any traffic comes through. The same thing happens with that radio when I let off the mic on the Kenwood. The green indicator light on the Baofeng also lights up for a brief millisecond then goes off. So that tells me that something is making it through. I just don’t know what.
 

AM909

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Note that some repeaters have a "kerchunk filter" that eliminates the hangtime (aka "tail") if you only transmit briefly. Assuming it normally has a hangtime, are you keyed up and saying something for at least 10 seconds? The brief green light on the mobile would be consistent with no hang time on the repeater, or a kerchunk filter.

Are you able to talk through the repeater, using the handheld, to another user? Does the mobile hear the other user (through the repeater)? No RX/decode CTCSS or DCTCSS or "optional signalling" on either, right?
 

KR4DWS

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Note that some repeaters have a "kerchunk filter" that eliminates the hangtime (aka "tail") if you only transmit briefly. Assuming it normally has a hangtime, are you keyed up and saying something for at least 10 seconds? The brief green light on the mobile would be consistent with no hang time on the repeater, or a kerchunk filter.

Are you able to talk through the repeater, using the handheld, to another user? Does the mobile hear the other user (through the repeater)? No RX/decode CTCSS or DCTCSS or "optional signalling" on either, right?
The repeater hears the handheld great. I can hear the portable radio’s traffic on the mobile. The repeater calls for 100.0PL on TX and RX. I’ve tried it with both “optional signaling and QT/DQT”, as well as “optional signaling or QT/DQT” selected. I’ve also tried it with just QT/DQT. If I key up on either the mobile or portable and let off, I usually get a read off of the repeaters call sign. I did a radio test on the Kenwood, making sure to transmit for at least 10 seconds, and heard nothing but the repeater call sign come over both radios. Should I change the codeplug in KPG-D1N and remove the decode PL? Mind you I can hear local club nets on the portable with the same current parameters that are in the Kenwood mobile.
 
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kayn1n32008

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The repeater hears the handheld great. I can hear the portable radio’s traffic on the mobile.
What you are most likely seeing, is desense. The baojunk has zero front end filtering. It simply can't reject the RF 600kHZ away, that is saturating the receiver, rendering it deaf to the incredibly weak signal coming back from the repeater.
 

ramal121

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Time to reset. What exactly is "the repeater problem"? Be as specific as possible. Remember that any receiver near a transmitting antenna can experience some level of desensitization, depeding on transmit power level and separation in both frequency and distance. Transmitting with mobile power levels (25-100W) only 600 kHz and a few feet away from a CCR, or even some commercial-grade radios, can cause that receiving radio to fail.

What you are most likely seeing, is desense. The baojunk has zero front end filtering. It simply can't reject the RF 600kHZ away, that is saturating the receiver, rendering it deaf to the incredibly weak signal coming back from the repeater.
I concur whole heartedly with these. Move the Baofeng away from the mobile/antenna and check.
 

KR4DWS

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I did a radio test earlier today on the repeater and no one answered, but that could be because no one was on at that moment or thought they didn’t need to answer. I’ll have my son move the radio inside and listen for me. Or I’ll just call monitoring and see if someone does answer.
 

kayn1n32008

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I did a radio test earlier today on the repeater and no one answered, but that could be because no one was on at that moment or thought they didn’t need to answer. I’ll have my son move the radio inside and listen for me. Or I’ll just call monitoring and see if someone does answer.
Move that baojunk like 3 or 400 feet away.
 

KR4DWS

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Any luck?
Apologies everybody I’ve been meaning to check back in with y’all. Between home projects and work, and then finishing nursing school, I’ve just had a lot going on and I guess I should’ve taken this project on at the same time lol but I finally got a contact on the local repeater. So you guys were right and you taught me a lot during this whole troubleshooting process. I never heard anything about front end filters or anything of the sort on cheap mobile radios, or lack there of in this case. Turns out that was the problem; I was overpowering the handheld. I was able to actually copy and have a conversation with somebody today. So the problem is considered resolved. Again, everybody, thank you so much for your help and for teaching me a lot. And now I’ve acquired new equipment along the way for troubleshooting in the future😂
 
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