TM-v71a PL (CTCSS) question

[car5le]

Greetings:

I just picked up a new TM-V71a. I did the MARS/CAP mod for legitimate purposes. I programmed in the agencies that I work with, some of which have different Receive and Transmit PL tones. If I select the feature to add in the Receive PL, the Transmit PL is grayed out and the channel won't work. If I set the Transmit PL correctly and leave the Receive PL CSQ the channel will work, but I get interference on the Receive frequency.

I'm using both RT Systems software and the Kenwood factory software.

Is this a standard issue with this radio, or am I missing something?

Thanks!

 

[N4KVE]

It's not an issue, & your radio is working correctly, as it was designed to work. The problem is ham radios were not designed to have different pl's for tx, & rx, like commercial radios do. While I won't mention it, I'm sure the next 6 replies will tell you that you shouldn't be transmitting on PS freq's with a ham radio, even if you are authorized to use the freq's. So the correct response would be to set the correct decode pl, & leave it at that.

 

[car5le]

Thanks Gary! I really do appreciate the response. I also have a Wouxun UV6 portable that will do the different tones, but it is Part 90 certified, so that explains that. And yes, I know I shouldn't be using the radio on PS frequencies, but convenience is everything. Long story...

For a preemptive strike for those next "6 replies" - you have my admission of guilt here. If you still feel compelled to put your two cents in to chastise me, feel free to expound your values on me. Just expect me to ignore them...

 

[rapidcharger]

Thanks Gary! I really do appreciate the response. I also have a Wouxun UV6 portable that will do the different tones, but it is Part 90 certified, so that explains that. And yes, I know I shouldn't be using the radio on PS frequencies, but convenience is everything. Long story...

For a preemptive strike for those next "6 replies" - you have my admission of guilt here. If you still feel compelled to put your two cents in to chastise me, feel free to expound your values on me. Just expect me to ignore them...

Its not that anyone wants to chastise you, just inform you that there are some pretty serious things that can go wrong when some made-in-china ham toy malfunctions and the end result is death. And it is breaking the law so there are consequences for doing so. There are no legitimate reasons to use ham toys for public safety. None.

You didn't even know that ham toys won't do split PL, there's a lot of things they won't do that you will might them to do in public safety.

Convenience is always great til people die.

Only 5 more to go. :wink:

 

[AK9R]

Only 5 more to go.

No, zero more to go.

The issue of non-Part 90 amateur radio equipment being used under Part 90 is a horse that has been beaten to a bloody pulp and died many deaths. The OP knows his equipment is not Part 90 compliant. We can inform him of the facts, which has been done, but the final decision whether or not to use the equipment is his to make.

This is not to say that I condone this practice, I don't, but there's little to be gained by taking up message slots here to chastise the guy any further.

 

[cabletech]

Not going to or try to chastise any one.

Just to bring up another point.

The PL/DPL is working the way it should FOR HAM RADIO, and the radio is also NOT able to be placed in a narrow band mode for commerical frequency's.

Also, remember that CAP/MARS frequency's are also now narrow band

 

[AK9R]

The PL/DPL is working the way it should FOR HAM RADIO, and the radio is also NOT able to be placed in a narrow band mode for commerical frequency's.

The radio is capable of being switched between FM and FM Narrow. The circuit description in the service manual talks about an electronic switching circuit that switches the receiver bandwidth between "narrow and wide" by changing the ceramic filters in the IF stage. The manual then goes on to talk about the MPU controlling an electronic variable resistor at the deviation adjustment point to switch the transmitter deviation between "narrow and wide".

 

[car5le]

Thank you all for your input!