Batboard

Can I make a repeater out of two XTL 1500's and rund them in ADP all the time ?

Yes, it will work for however long it takes for the PA to burn up. The XTL1500 mobile is not intended or designed for continuous duty transmitting. The audio will be harsh due to double vocoding.

After a little while you will be looking for a different solution because overall performance will be disappointing.

If you have to run digital, you would be better off looking into a digital repeater. If a Quantar won't fit your budget, Relm BK, E.F. Johnson, and Daniels, as well as other manufacturers, make digital repeaters that are significantly cheaper than a Quantar. Cheaper is not always better, but sometimes it's just as good.

Thank you for the quick reply. I need to have AVP as this will be used for police type sneaky stuff. We are using simplex right now. Mobile 2 mobile almost works throughout the town,
I wanted a repeater if we get portables.

I would be really curious to know how someone would hook up two XTL1500s in a repeater configuration without having double vocoder problems. You cannot just RICK together two P25 radios.

ohr cohmer ohn itwirl ba fine

If budget is of major concern, along with double vocoder (etc...) We found the Tait 9100 series base does the trick for about half the cost of a Quantar. Normally I would go with Motorola. But in a pinch it's not bad.

-WEC

I was talking to someone on here (really don't remember who it was) that have done back to back XTL's without a problem. I am trying to figure out who it was and how it was done..but IIRC it wasn't hard to do.

TPG here did the same with Maxtrac's that also work well for non-PS applications

I've connected a XTL to a Quantar via an external controller as an emergency IO patch - digital on the XTL and analog on the Quantar. It worked well and didn't sound too bad. I wouldn't doubt that it's doable and it wouldn't be hard at all. Other than duty cycle, the only problems would be any audio flaws from the receiver would be multiplied by the transmitter as a result of double vocoding and there would be a huge delay as the audio was processed four times. By the time "don't shoot, I'm coming out" came through, you'd be out and shot.

You could use the maxtrac repeater design...it will pass the P25 with or without ADP, and no double vocoding. I wouldn't normally recommend the set-up for public safety, but since you're already looking at a home-brew solution, what the hell.

I also read a post on here sometime in the last year or so where someone bypassed some of the MTR2000 internals by running the discriminator output directly into the flat TX input & it passed P25 as well...I'd feel a whole lot better with that scenario for a home-brew solution.

Thanks for all the comebacks. If it happens it won't be used enough to worry about any duty cycle issues.

I have ricked together two XTL1500s to create a P25 repeater which works beautifully. It is a non life safety operations channel. I modified the RICK cables to interface with the XTL's. For obvious reasons the unit IDs won't pass through nor will any type of encryption. If we wish to run encryption we must put the TX side in secure mode. Not a bad setup to test a digital like system. The audio quality is a little less than a true P25 repeater but hardly noticeable. I set the rick to 0 hang time to avoid too much continuous wear on the PA.