HRN 280: P25 Network eXchange Repeater Linking (from the 2016 DCC)

/
HRN 280 - P25 Linking POSTER square.jpg

There is life left in P25, perhaps the first somewhat popular digital voice mode on Amateur Radio VHF/UHF. The life comes from a linking system that David Krauss NX4Y introduces at the 2016 DCC. He calls it P25NX - Network Exchange.

The P25 mode started in Public Safety radio in the mid '80's. After about 10 years, those guys say their radios are due for replacement. Hams bought the trade-ins and put them on the ham bands. But the repeaters were isolated islands. D-STAR became more popular because repeaters were linked, bringing in traffic from around the country or world. P-25 is about to have even more cheap equipment on the market as they migrate to Phase 2, and David's link system could make P25 a competitive mode in ham radio again.

HRN 279: AREDN Emergency Digital Network - from the 2016 DCC

/

AREDN Project Manager Andre Hansen K6AH details this mesh based data network that's up and running in the San Diego CA area. It uses the 2.4, 3.4 and 5.9 GHz ham bands to haul data across the region, and then distribute it to local users, with a primary EmComm goal.

Andre gave this talk at the ARRL & TAPR Digital Communications Conference in St. Petersburg FL in September 2016. 

HRN 278: Remote Base (from the 2016 DCC)

/

From the ARRL & TAPR Digital Communications Conference in St. Petersburg FL, September, 2016. Lou Romero W4LT has been doing the remote for a long time - before it became the popular thing it is today. He'll tell his story, review the options for private and public remotes, club-based remotes, Off the Shelf and DIY.

This is not super-technical talk. It's more 'what the pieces are and how they go together.' Lou will demo his club's system at the end of the talk, and there's some good Q&A.