Page 1 of 1
interesting rumor heard about Maxtracs and Astro Equipment
Posted: Wed Apr 14, 2004 12:41 am
by 2wayguru
I heard a rumor from someone that said that maxtracs when put in a repeater configuration will repeat P25 so if you have astro equipment you can build a maxtrac repeater and use that as a P25 repeater. Right now I am using a UHF Quantar in 440 ham with P25 Astro enabled. But if it is true that you can use maxtracs for P25 I will build a couple and use them as backups if the quantar goes down again or has to go to the depot for some reason. Any info on this will be helpfull... thanks
Posted: Wed Apr 14, 2004 12:43 am
by KG6EAQ
When I get my other maxtrac in I'll give it a try. I'll swing down and grab a repeater module from Will and try it out. Would be very interesting though... cheap ASTRO repeater. I like!
Posted: Wed Apr 14, 2004 3:29 am
by wavetar
It was discussed here at length. The Pager Geek is the only person I know of who's been successful & proven it to work. It's not a standard R.I.C.K or 'WILL module' type of set-up.
Todd
P25
Posted: Wed Apr 14, 2004 7:45 pm
by clavo
You run a P25 ham repeater in the pacific NW? I'm interested in details. Seattle??
-c
Posted: Wed Apr 14, 2004 11:43 pm
by motisking
Wow! I guess if the repeater "heard" the signal it would repeat it. But the signal at receiving radio would be "noise" and not pass thru? Interesting?!
Posted: Mon Apr 19, 2004 9:47 pm
by Hightower
Right after the descriminator, build a simple 4 level FKS decoder ($10), reverse this process and bypass all the audio filtering at the transmitter. Doing this would make the repeater digital only, but hey a cheap way to pass P25 through a homebrew repeater
You might also get results if you feed right out of the descriminator, and feed that past all the mic's audio filtering/DC bias in the transmitter - still some simple op-amp interface would still be needed between the receiver and transmitter.
Your right, normal RICKS or simular will not pass P25 transmissions reliably due to the quad logic digital logic needed for P25. A normal RICK system will pass normal digital 1 and 0, but not 00, 01,10,11 digital quad logic levels required by apco25 and many cellular phones, alpha pagers, etc...
Posted: Tue Apr 20, 2004 2:14 am
by 2wayguru
My repeater is in Dundee, about 40 miles SW of Portland....