44net

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3198 discussions

Re: [44net] OFDM Modem
by Rob Janssen 08 Sep '17

08 Sep '17

> Y'know, there is some relevance in a significantly asynchronous circuit > with this stuff. I think the correct label is "asymmetric" but many people call it "asynchronous"... > Put the High speed TX on the top of the mountain and have it push high > speed frames in broadcast or multicast mode whilst the outlying stations > listen to the stream and write down the packets relevant to them. This is of course what I had in mind. We don't have any mountains here but we have a 3cm ATV repeater at 220m in a broadcast tower transmitting a DVB multiplex where we could use some bandwidth (or e.g. the bandwidth remaining after the several variable-rate encoded ATV channels have had their share) to transmit IP over DVB. Both broadcast/multicast traffic (like IPTV streams from the repeater) and traffic to a single endpoint (after all, we do not hide traffic from eachother). The return channel could be much slower indeed, depending on the kind of traffic and the required return traffic. Maybe even a 9600+ baud packet link, or one of those newly developed 70cm links of about 400kHz width. At the moment the repeater is not operating, but we are working on getting it back on the air. Rob

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Re: [44net] OFDM Modem
by Steve L 07 Sep '17

07 Sep '17

While I applaud Ron's experiments, it would have a very long road to becoming something practical for the masses. Heck I can say the same for the NWDigital radio. They have been trying for quite some time to make the thing happen. I fear by the time either would come to fruition, the whole market / tech landscape could be different. (I.e, 56k is not as appealing at the price point as it was 10 years ago when they started, etc) As for the ARRL, I am the only one who pounces on their staff virtually every chance I get (at ham fests and by email), about getting some of these changes though their heads? I think a coordinated approach, can help our cause. In addition, anyone can make comment directly to the FCC. How seriously they take things without someone waving money in their face is a whole another issue. I wrote this paper quite some time ago, that covers quite a few of the issues: http://www.qsl.net/kb9mwr/projects/wireless/70cm-ATV-HSMM.html Basically they way I see it, one has three ways to experiment: 1.) Pay for/file for a STA, which gives you 6 months 2.) Include some element of image transfer, so what your doing can be classified as an image transmission rather than data. (most logical/easiest to do) 3.) Develop a data mode that uses multiple carriers, as each carrier can be 100 KHz wide. #3 is something I joked with friends about when I was in high school. That was long before SDR, so we envisioned taking a few TNC's and radio's on different frequencies, RF combiners and tons of filters to make it actually work, and from there channel bond/load balance all the data streams to achieve better throughput. Do we have anyone who holds a ARRL position on this list? Steve, KB9MWR Mark Phillips <g7ltt at g7ltt.com> wrote: > >"Maybe someone at ARRL ...." > >Ha! Funny. > >It's been many folks' experience that the ARRL does nothing that is not in >its own interest. Unless they can be persuaded that XYZ technology is good >for them and Ham Radio they won't lift a finger. It should also be noted >that the ARRL speaks for less than 20% of the US ham population (see >membership figures posted in QRZ). We are 700K+ hams here in the US. ARRL >has less than 100K members. That said, they are the only group able to >engage the FCC and push for changes etc. It's an expensive proposition!

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Re: [44net] USENET news on AMPRNet
by Rob Janssen 06 Sep '17

06 Sep '17

> Setting up a NNTP server is easy in JNOS. Pretty tricky on Linux... Actually it is easy, just "apt-get install inn" and editing a couple of config files. Of course you first need to understand the architecture of USENET and the INN software but there is documentation available. It is comparable to the complexity of configuring JNOS when you have not done that before. Rob

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Re: [44net] USENET news on AMPRNet
by Rob Janssen 06 Sep '17

06 Sep '17

> USENET is obsolete. Don't waste your time on it. Well, not as obsolete as a mailing list... A closed news server would be much more convenient to use for discussions like this than a list... (and of course you could run it on a Raspberry Pi :-) Rob

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USENET news on AMPRNet
by Brian Kantor 06 Sep '17

06 Sep '17

If you're one of the very few people who have ever taken advantage of the ability to read USENET news via AMPRNet and the news.ucsd.edu server, you should be aware that that server is failing from old age and will be taken out of service soon. We don't plan to replace it; Usenet itself is fading away. I co-authored the NNTP protocol some 31 years ago; that's a pretty good run for any internet standard. If you really need your Usenet fix every day, you might want to investigate www.eternal-september.org, which offers free Usenet access (but has very limited resources). - Brian

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List Access
by Fredric Moses 06 Sep '17

06 Sep '17

Brian, Can we make this list open to just those named in the description of the group… amprnet users and gateway operators for ops related items. -- Fredric Moses - W8FSM - WQOG498 fred(a)moses.bz

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Re: [44net] An anniversary of a sort - 36 years
by Rob Janssen 05 Sep '17

05 Sep '17

> I think you meant /48’s or at least a /63 -- a /64 is meant to be the > smallest subnet -- it is not meant to be sub-divided any further. Because > some ISPs are allocating /64’s to their customers, I also think a ham-radio > allocation would be good. A /64 would be enough for a radio amateur with a simple network who wants to join a ham-radio network. It would surely not be optimal, but I would not expect an ISP that is that clueless (to allocate a single /64 to their customers) to be willing to route foreign network space to their customers. So what use would it be to have portable address space as a solution for that? Rob

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IPv6
by John D. Hays 05 Sep '17

05 Sep '17

I added a few IPv6 addresses for those who want to try. dig -t AAAA k7ve.ampr.org dig -t AAAA nw7dr.ampr.org dig -t AAAA a.nw7dr.ampr.org dig -t AAAA b.nw7dr.ampr.org dig -t AAAA c.nw7dr.ampr.org dig -t AAAA ar-dns.ampr.org -- ------------------------------ John D. Hays Edmonds, WA K7VE <http://k7ve.org/blog> <http://twitter.com/#!/john_hays>

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Re: [44net] An anniversary of a sort - 36 years
by pidpawel 04 Sep '17

04 Sep '17

It's important to be aware of the timeline but this anniversary might also be a good time to look back at the history and think about the impact this assignment has made. What *new* technologies has been developed because of this network? Which crises have been mitigated using this network? Have it helped to spread the HAM radio "spirit" to the young people? What other good things have this network done? It's very sad for me to say that the only thing I can see about this network is a bunch of guys trying to stick with old technology (RIP? please.) at all cost and arguing who is more important in a tree of people allocating numbers. A /8 network is a great value nowadays, the IPv4 especially in Europe is in a huge crisis and getting new addresses is nearly impossible. From the other hand most of the address space in this network is unused but when you try to request allocation for yourself you can easily get rejected because of silly reasons. (I didn't even try to request one for myself after my friends showed me the coordinator responses.) There might be some things going on the used parts of the network but I couldn't find any example that could be genuinely useful to the world. Could you please prove me wrong or if I'm right try to consider sharing the address space with a "new" movement of hacking and hackerspaces? HAM radio should be all about hacking [1] but frankly speaking I don't see much of it in HAM radio space these days. There are some exceptions - i.e. "OFDM modem" thread from the last days but there are as rare as freakin' unicorns. This message is not meant to be mean. I'm just trying to pinpoint some things I've seen as an observer of this network and HAM radio (mostly in Poland but also the "worldwide" parts) and share some ideas how the things can be done better and provide a better value to the whole world. [1] https://en.wikipedia.org/wiki/Hacker_culture -- I wish you all the best SQ9PID

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IPv6 Firefox add-on
by Tom Kloos 04 Sep '17

04 Sep '17

Hi, Try "sixornot" for IPv6 status: https://addons.mozilla.org/en-US/firefox/addon/sixornot/ It works great for me with FF release 55 and 56 beta. Depending upon what version of Firefox you're using the web site may say "This add-on is not compatible with your version of Firefox.". This is due to Mozilla killing off all add-ons not implemented with WebExtensions starting with FF version 57. sixornot will still run fine up through FF version 56. Download it anyway! After FF 56 you'll have to switch to the PaleMoon browser (sixornot works great on it for me too). 73, -Tom WS7S At 12:16 PM 9/4/2017, you wrote: >Does anyone know of nifty little firefox add-on that will denote that >you are connected via IPv6 to the site? I'd like to be more aware of >what all supports it in the course of my general browsing. I think >that could really bring an awareness. Kind like the more recent "This >site may not be secure" when Browsers detect login details over a non >HTTPS connection. > >Having to sniff it with netstat to tell if its 4 or 6 is less than appealing.

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