As many people know, I've been trying varying ideas of a way to post information on-line about who is QRV. Sked pages, HRGnet, Hamspots, etc, etc.
In thinking about Network 105, I remembered the old MHEARD packet command and how easy and convenient that was. The fact that 300 baud packet is not as robust as modes like Olivia may actually serve a useful purpose. If you hear a signal on 300 baud packet, chances are you can work it with other modes. If you really want to "talk" to a particular station and the path is marginal, you could use the "network" part of Network 105 and go in via a node . If you establish a connection keyboard to keyboard , and do not wish to tie up the frequency, then you could "QSY" and pick a different mode. Of course , this is just one band, but if the idea takes off...maybe there would be a 30 or 40 frequency for times 20M is "dead". With 10M radio selling for $25.00 at hamfests nowadays, I am also intrigued about a 10M network of low powered (25 watts) packet stations that could be quickly utilized. This would allow dedicated full-time packet stations and free up the main rig for other operations. Multipsk installs easily on older computers, so that old laptop of PC laying around your basement could also be part of a dedicated station, or that old TNC you have not used in years (I have two!) Just a few random thoughts from me, but Sholto and Tony's experiments have established that this mode and network while "old school" could actually be a viable tool in this digital mode age. Andy K3UK --- In digitalradio@yahoogroups.com, Tony <d...@...> wrote: > > On 5/14/2010 4:50 PM, sholtofish wrote: > > > > Tony, It would be interesting to experiment with packet over nvis > > paths too. The higher signal to noise ratio typical with nvis would > > really speed throughput. Maybe you could devise a simulation > > > > It would be interesting Sholto. In addition to high signal-to-noise > ratios, NVIS propagation appears to be relatively stable. The path > simulator indicated that the mode is especially sensitive to channel > distortion so I would expect throughput issues if the ionosphere became > somewhat agitated, regardless of how strong the signals where. > > PathSim's NVIS simulation tries to emulate a situation where ground > waves interfere with NVIS sky waves. The delay between the two signals > can destroy throughput so this is something to consider if the other guy > is close enough to hear via ground wave. > > > Another idea which keeps nagging at me is using SCS's Robust Packet > > with their fairly cheap kiss Tracker TNC. Robust packet looks like it > > either works at 200 or 600 baud with a fairly narrow bandwidth. > > > > Only one way to find out Sholto - I'll take a look at the price. > > Tony -K2MO > > > > > > --- In digitalradio@yahoogroups.com > > <mailto:digitalradio%40yahoogroups.com>, Tony <DXDX@> wrote: > > > > > > Patrick, > > > > > > Sholto is the one who "twisted" my arm to revisit HF Packet. Net 105 is > > > a remarkable network and one can only imagine how many messages have > > > been processed since the 1980s'; all on a shared channel with a > > > relatively narrow mode. > > > > > > I've used the network to connect to Sholto when there is no propagation > > > between us. I can log into his packet mailbox and leave him a message > > > thanks to magic of digipeating. > > > > > > Your program does a wonderful job on HF packet. > > > > > > Tony -K2MO > > > > > > > > > > > > > __________ Information from ESET NOD32 Antivirus, version of virus > > signature database 5113 (20100513) __________ > > > > The message was checked by ESET NOD32 Antivirus. > > > > http://www.eset.com >
