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XTL Repeater

nikronzo

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A new project I am working is building a small P25 repeater out of 2 UHF XTL's; my goal is to have a low power, low duty cycle P25 machine built out of two XTL2500's. I've done my research and have not seen a lot of info regarding building something like this outside of using XTL's for DVRS'. I know there are a few limitations such as lack of passing on RIDs and duty cycle problems but this is experimental at this stage.

Does anybody have any experience building something like this and if so, what sort of pinouts would I need out of J2 ports in the back. I am looking to build a custom cable for this as well. Also what CPS settings would I be looking at for the Rx and Tx side of things.

Closest helpful info I could find was the PDF of the Astro Spectra Consolette manual appendix A on page 107

Moreover, does everyone think this project is feasible?
 

jeepsandradios

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I built one. Used it once. Swapped in a Quantar.

1 - No it will not pass ID of the radio talking. You will only see the ID of the transmitting radio.
2 - Encryption will not pass thru the repeater. You would need both radios setup for encryption, one to decode and one to encode.
3 - All signals are on J2 however there was a version where the detect circuit changed. Early went high on RX and later went low. (Pin 13 - Channel Activity)

To be honest unless its a one time use thing spend a few $$ and grab a quantar.
 

prcguy

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Yes yes yes on this! A used Quantar will usually cost less than two XTL2500 mobiles.


I built one. Used it once. Swapped in a Quantar.

1 - No it will not pass ID of the radio talking. You will only see the ID of the transmitting radio.
2 - Encryption will not pass thru the repeater. You would need both radios setup for encryption, one to decode and one to encode.
3 - All signals are on J2 however there was a version where the detect circuit changed. Early went high on RX and later went low. (Pin 13 - Channel Activity)

To be honest unless its a one time use thing spend a few $$ and grab a quantar.
 

nikronzo

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Yes yes yes on this! A used Quantar will usually cost less than two XTL2500 mobiles.
While this can be true, I already have the XTL's and they arent doing anything as of right now so I wanted to experiment a bit. For the sake of argument, what if I just wanted to do FM with the two mobiles.
I'm waiting for someone to say sell the mobiles and use the cash to buy the quantar, which isn't the worst idea lol
 

nikronzo

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I built one. Used it once. Swapped in a Quantar.

1 - No it will not pass ID of the radio talking. You will only see the ID of the transmitting radio.
2 - Encryption will not pass thru the repeater. You would need both radios setup for encryption, one to decode and one to encode.
3 - All signals are on J2 however there was a version where the detect circuit changed. Early went high on RX and later went low. (Pin 13 - Channel Activity)

To be honest unless its a one time use thing spend a few $$ and grab a quantar.
Do you still happen to have the pinouts for the crosspatch cable on the J2 ports?
 

MTS2000des

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Hams and their fetishes for building repeaters out of mobile radios.
Aside from the obvious as mentioned, XTLs aren't rated for even 50 percent duty cycle. Gas bagging hams with 3 minute keydowns won't lead to much service life.
A Quantar, OTOH, can be keyed up 24/7/365 (as many were used in trunking environments where active CC stayed up continuously) and will never skip a beat.
They are also miles above some uniboard disposable mobile radio in performance in all respects if aligned properly.
 

nikronzo

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Fetish is such a strong word. I prefer mild preoccupation. I have an MTR2k set up as a repeater and love it to death, its duty cycle is unparalleled as I'm sure the quantar is even better.
I just wanted to mess around with the XTL's as a mini repeater as I have never done that before, only with CDM's.
 
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