80s vintage APR ?

merlin

Active Member
Joined
Jul 3, 2003
Messages
1,062
Location
South East Idaho
Anyone still using the old 48/96 baud packet these days ?
I have a couple MRM dataradio units I can mod for APRS and wire into just about any radio.
Just wondering if it is worth the work.
73s
 

mikewazowski

Forums Manager/Global DB Admin
Staff member
Joined
Jun 26, 2001
Messages
12,295
Location
Central Ontario
And if we really want to nitpick, APRS was invented in the mid 90's. Regular packet started in the late 70's.

I also doubt that commercial data radios would support ax.25 but heck, if somebody wants to give it a go, knock yourself out.
 

merlin

Active Member
Joined
Jul 3, 2003
Messages
1,062
Location
South East Idaho
The who: Professor Norman Abramson first experimented with this in mid 70s
A 9600 baud UHF system was the result.
Early 80s Tucson amateur packet radio adapted this for hams. (I was sort of on the ground floor of this.)
Playing with telephone modems, I got old hat with Ax.25
Back in those days, I modified and reprogrammed an old credit card terminal to do the basic packet and run a Kenwood radio with the serial port.
These dataradio's are nearly the same thing (minus keyboard and display) On a 25 Khz wide channel, they can do 119.2 Kbaud (usually 9600) for like 900 Mhz systems.
They would be easy to reprogram for the ham world, even slow HF with the heavy FEC.
Yea, I know the max limit is 1200 baud, that is bandwidth constraints.
They don't have a big flash, so that could limit things.
Certainly a bit of work, I was just wondering if it would be worth the effort.
More and more, I see digital taking its place.
Cheers
 

trentbob

W3BUX- Bucks County, PA
Premium Subscriber
Joined
Feb 22, 2007
Messages
3,609
Anyone still using the old 48/96 baud packet these days ?
I have a couple MRM dataradio units I can mod for APRS and wire into just about any radio.
Just wondering if it is worth the work.
73s
Honestly, I don't think it's worth it and there probably isn't anybody doing it???, I might be wrong on that but why would they?

We could compare it to SWL, I'd like to listen to the guts of my 20 year old, when I received it, in 1964, Zenith shortwave radio taken out of a stand-up piece of furniture with 200 ft of copper wire in the mid 60s but I would wonder how that would work today in today's environment. Just using that as a comparison, before anybody jumps me. Very interesting thread. ;)
 

AK9R

Lead Wiki Manager
Super Moderator
Joined
Jul 18, 2004
Messages
7,323
Location
Central Indiana
There are pockets of "regular", point-to-point, connected AX.25 packet on VHF around the U.S. It has its place for auxcom and you can connect a packet node to the Winlink system for world-wide email.
 
Top