I agree with everything Bill has mentioned. Direwolf can work well north of 19200bps if it has a soundcard that can support say 96Khz or 192Khz into a radio that can handle the increased bandwidth too. The larger issue is the lack of any data grade radios. I'm talking radios with a RX->TX and TX->RX times in say the low tens of milliseconds range. Without fast key-up and rx recovery times, there just isn't much we can do here to really "go faster".
NW Digital's UDRX has promised something like this this but it's been years... I'm still hoping it or something similar will come to market that's affordable. Here's hoping!
--David KI6ZHD
On 03/07/2018 06:53 PM, Bill Vodall wrote:
Couldn’t you just use dire wolf? It is a free soft Tnc that supports 9600
Direwolf is awesome..
I’m a huge fan of direwolf. Pair a usb soundcard with a cheap radio and you can easily have a ~$100 dollar aprs rigs that can tx and rx.
We still, even after all these years, have a real lack of a 'good' higher speed packet radio. The cheap (BaoFeng?) radios will work (sorta) for APRS but at slower speeds (maybe up to 3600?) and they have a TXD an order of a magnitude longer than acceptable.
There are some options for 9600 (or faster) but there are still issues and challenges.
I had to spend more than $100 total to do 9600 I'd question the whole
The problem with Packet Radio is still the 'radio.' A reasonable 9k6 station is about $250 - but at that price better off just getting an off the shelf Kenwood TH-D710 which works well at 9k6 and offers a second channel.
Adjusted for time - these are still way cheaper than the $500 I paid in 1986 for my first 1200 baud packet station consisting of a Kantronics KPC and Yeasu HT.
The article on 9600 packet in last years DCC proceedings (PDF is available on the web) is a good review of the technology and is a start for looking at radios.
73 Bill, WA7NWP
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