[digitalradio] JT65A..first contact
Hi Allread Andy's very good Bozo Guide to HF JT65 and followed his instructionswas on 14076 and saw a JT65A signal (using Fldigi)...loaded up WSJT and proceeded to Monitor...saw JA2BGH calling CQ so decided to take the plunge and replymade it first shot..surprise...good contact both waysnow im bitten with the JT65A bug. Have been on digital modes for about 6 years using PSK31 RTTY etcO/S is Kubuntu Linux on a AMD K8 machine with 512 ram...1.8ghz speed for clock accuracy im using the ntp server of au.pool.ntp.org as Dimension4 is only for Windows..clock seems to be accurate Rig is a TS-140S to a 2-30mhz Inverted V at 10m Tnx Andy K3UK for a very good jobneed to add some comments for Linux users Hope to see some of you on JT65A David VK4BDJ
Re: [digitalradio] JT65A..first contact
Thanks for the kind words David, glad you made your first JT65A contact from Townsville (dangerously close, in my opinion , to Port Douglas. Home of the best meat pies, Mocka Pies !) . I will add a few Linux items to the next revision, especially the options for clock accuracy. Andy. On 9/30/07, David Munn [EMAIL PROTECTED] wrote: Hi AllI read Andy's very good Bozo Guide to HF JT65 and followed his instructionswas on 14076 and saw a JT65A signal (using Fldigi)...loaded up WSJT and proceeded to Monitor...saw JA2BGH calling CQ so decided to take the plunge and replymade it first shot..surprise...good contact both waysnow im bitten with the JT65A bug. Have been on digital modes for about 6 years using PSK31 RTTY etcO/S is Kubuntu Linux on a AMD K8 machine with 512 ram...1.8ghz speed for clock accuracy im using the ntp server of au.pool.ntp.org as Dimension4 is only for Windows..clock seems to be accurate Rig is a TS-140S to a 2-30mhz Inverted V at 10m Tnx Andy K3UK for a very good jobneed to add some comments for Linux users Hope to see some of you on JT65A David VK4BDJ
[digitalradio] The Signal From Hell
The Signal From Hell Hank Greeb, N8XX [EMAIL PROTECTED] September 28, 2007 A FYBO QRP contest way up north? Not ’til Hell freezes over! (PS: It did.) This is an outbuilding typically used as a woodshed, but we found it open and used it as the 40 meter operating shack. We had to close a wide gap that was used as a window so that wind wouldn’t blow snow in and goof up the electronics. [Hank Greeb, N8XX, Photo] Ed Kwik, AB8DF, and I warm up over at the 40 meter operating shack. [Cortland Richmond, KA5S, Photo] Cortland, KA5S, works 15 meter CW in a building normally used as a wedding chapel. Actually, he found his rig wasn’t transmitting enough to make a contact, but he tried. [Hank Greeb, N8XX, Photo] Have you been so perturbed at your buddy that you wanted to tell him or her to “go to you know where”? Well, there’s a place in Michigan where that’s very common -- a “wide spot in the road” with the name of Hell, Michigan, about 20 miles from Ann Arbor. When the Arizona ScQRPions QRP Club announced the 2007 “Freeze Your Buns Off” contest for February 3, the logical place to do that seemed to be where “Hell was frozen over.” The object of this contest is to take your QRP rig out into the field and make as many contacts as possible before you either give up or freeze a certain part of your anatomy. The scoring gives a multiplier of 1 if the operating temperature is greater than 65 degrees, 2 if you’re operating between 55 and 64, down to a multiplier of 6 if the temperature is less than 20. Another multiplier of 4 is if you’re operating outside, a multiplier of 2 if you’re operating independent of ac mains power. It’s relatively easy to get an overall multiplier of 48. Plus, a multiplier is given for each state, province or country you work. Wow! It Froze! So, the idea of a “Hellxpedition” was born. With Hell freezing over at that time of year, we figured the temperature multiplier of 6 was a snap! The next step was to figure out a logical call that might attract a few more contacts. Why not N8H -- so we applied for it and received it! As someone said, “All the rest is history.” I advertised this idea on several reflectors, and very soon Ed, AB8DF, from Waterford (near Detroit), and Cortland, KA5S, from Ada (near Grand Rapids) volunteered to join the effort. We decided that we’d each bring a rig and determine choice of bands by lottery. As predicted, Hell was really frozen. When I arrived on Friday, the 2nd, the temperature was in the low teens, and the wind was brisk. After a few tries two halyards were strung over two trees, at about 50 feet, and the third point for ends of two antennae were chosen, but, because of the wind, I figured the antenna might blow down overnight. WRONG IDEA. Murphy Visits The next morning, the temperature was 2 degrees, and wind blew one of the halyards into the tree, where it was hopelessly tangled on a branch about 30 feet high. After just a little bit of thought, it was determined that 30 feet would have to do, because the wind and snow was just too much to attempt a launch of another halyard. Then the 40 meter rig wouldn't put power to the tuner -- it turned out to be broken coax, which was found and fixed. Also, alternate power from a generator wouldn't start at such a cold temperature, so we gave up and plugged into the ac mains, losing an “independence of ac mains multiplier. Overall, we didn't start operations until after 1700Z. Signals on 40 were okay, but 20 was weak until 1900Z. Fifteen was non-existent -- or the rig was having problems. We commandeered two unheated outbuildings for two of the three stations, and Ed operated from his van. The 40 meter station was in a woodshed with an open window -- so we scrounged around and found a garbage bag from which we made a “temporary window.” This kept out most of the wind and snow, until the wedges holding it gave way and the entire frame landed on top of the operating table and toppled a propane lantern which was being used for light and a bit of heat. Fortunately the only damage was a couple broken mantles to the lantern, and a broken cable between the computer and the rig. We tried Feld-Hell on 40 meters at 1900Z and 2100Z with no takers. (We had advertised the mode, since this seemed very appropriate for the venue!) Dancing with the Devil The temperature never got above 13 degrees during the operation. You might say it was a cold day in Hell. The weather was getting blustery and snowy around 2100Z, so we decided to close up at 2200Z while it was still light. We made 45 contacts in 28 different states and provinces, so you might say we had a “helluva good time” in Hell. Thanks to the Arizona ScQRPions for running a great contest. Folks who worked us were delighted to work the “Devil” -- a nom de plume used by the 40 meter op, and seemed to appreciate the contact with the special event call N8H. We hope to see everyone again during FYBO 2008. Unless
[digitalradio] Re: The Signal From Hell
Good to see that Cortland KA5S is active in Hell. Bonnie KQ6XA --- In digitalradio@yahoogroups.com, Mark Thompson [EMAIL PROTECTED] wrote: The Signal From Hell Cortland, KA5S, works 15 meter CW in a building normally used as a wedding chapel.
[digitalradio] Re: Tests in ARQ FAE
--- In digitalradio@yahoogroups.com, Brian A [EMAIL PROTECTED] wrote: Just for curiosity. I wonder if the digital experts out there would care to speculate how all these new wonder modes would perform in the din of this contest? Would ALE work at all? Would these modes be able to exchange the contents of 2000 contacts as the bigger RTTY stations do in a weekend in the din? Even with a 300HZ filter, RTTY stations are wall to wall 14065-14125 with almost complete overlap. Correct me if I'm wrong. However, reading all these posts suggests that what these wonder modes want and or need is channelized, clear channel frequencies, with no human factor strengths added. Is that realistic to expect on the ham bands? 73 de Brian/K3KO I'm afraid that only PACTOR 2 or 3 has any chance of making it through these conditions OM. Everything else fails. 73 de Demetre SV1UY
[digitalradio] Re: 30 Meter PropNet Weekend October 6/7
Hi Rick KV9U, You bring up a good point actually and don't blame you for asking the question. First I must say my choice of words might be misleading as I see it because I used `beacon' you might have reference to part 97 section 203 on beacons: http://www.arrl.org/FandES/field/regulations/news/part97/ http://a257.g.akamaitech.net/7/257/2422/13nov20061500/edocket.access.g po.gov/cfr_2006/octqtr/47cfr97.203.htm A beacon may be automatically controlled while it is transmitting on the 28.20-28.30 MHz, 50.06-50.08 MHz, 144.275-144.300 MHz, 222.05- 222.06 MHz, or 432.300-432.400 MHz segments, or on the 33 cm and shorter wavelength bands Again my choice of words 'beacon' is incorrect because actually a PropNet PSK Station is using PSK31 within the allocated digital PSK31 portion of the band and not only transmits but receives other PropNet stations so it is not really a beacon since a beacon as described in part 97 section 203 is described as one way communications. I think the creator and owner of PropNet Ev W2EV had stated before on the question you ask saying: Sure! We operate under the same provision that APRS does in the USA: FCC Part 97.221. Obviously, this applies only to USA stations. http://a257.g.akamaitech.net/7/257/2422/13nov20061500/edocket.access.g po.gov/cfr_2006/octqtr/47cfr97.221.htm You might email Ev W2EV (email [EMAIL PROTECTED] or ask http://groups.yahoo.com/group/PropNET-Online/ ) to ask him for the legal run down on this but to my knowledge it is a legal activity using a legal digital mode or I would not be participating or promoting illegal operation (I think PropNet has been covered by most all major Ham Radio Mags including the ARRL/QST, CQ, etc and Ev involved with the FCC over this subject matter and to date no issues). Again I would not operate or promote this if I thought it to be illegal. I actually have operated PropNet like any other digital mode of communication where as I'm sending out my call and information and receiving others. The neat thing about this is that it's all logged in a database for propagation study and also is set to a map for real time propagation mapping so everyone can see in real time the band activity. I don't know if my response helps but its my honest understanding and thought your question needed a response. We are trying to promote more 30m digital activity and if you can prove otherwise about PropNet then I surely would not promote it. We always have our regular Thursday and Sunday night 30m PSK nights and that has promoted more activity on 30m also (of course other modes other than bpsk31 are being use too). If you have time please give PropNet a look over and you can always use just the `lurker' mode for receive only and still participate by reporting what stations/areas you are receiving. The information will be sent automatically via the Internet to the PropNet map where your location and received stations will be listed. I can't participate the whole weekend and don't expect anyone to 24 x 7 (although in 'lurker mode' you really can participate 24 x 7)but when in the shack I will be sending out my call and participating the most I can. Thanks again for the reply. De kb9umt Don http://groups.yahoo.com/group/30meterPSKGroup/ http://www.30meterdigital.com --- In digitalradio@yahoogroups.com, Rick [EMAIL PROTECTED] wrote: Is this 30 meter beacon activity legal? Can you reference where Part 97 permits this here in the U.S. below 28.0 MHz? Appreciate your help in understanding this. 73, Rick, KV9U Don wrote: Please join us to promote 30m PSK and Propagation Study on 30 meters (PropNet anchor freq= 10.1395 USB PSK +1500 and 30m PSK call freq=10.140 USB). This event will be the weekend of October 6th 7th (z 10/6/07 -Sat until 2359z 10/7/07 -Sun). Any station welcome to participate be it a PropNet PSK Beacon (tx rx) or a PropNet `lurker mode' (rx only). SWL stations or others not wanting to be a beacon (tx rx) please note PropNet has `lurker mode' (rx only) function so anyone can participate. Please go here and download and try PropNet and get on 30 meters October 6th 7th: http://www.propnet.org/ http://www.n7yg.net/propnetpsk/main.html http://www.n7yg.net/propnetpsk/download.html http://www.n7yg.net/propnetpsk/faq.html de kb9umt Don promoting 30 meter digital activity (30m our only low power digital band) http://www.projectsandparts.com/30m/ http://groups.yahoo.com/group/30meterPSKGroup/ http://www.30meterdigital.com
Re: [digitalradio] Absolute best case transfer - NON STANDARD MODE - Bandwidth .3 to 2.7 khz
Can you repeat the test with the same setup and S/N of, say, -5, 0, +10 dB? It would be interesting to know how the mode degrades. On 9/29/07, Les Keppie [EMAIL PROTECTED] wrote: Hi All Here are the figures for a file transfer done from TEST1 to VK2DSG on the same computer and using the same radio so we have absolute max S/N ratioup to 31 db Regards Les VK2DSG -- Regards, Robert Thompson
Re: [digitalradio] useless qrm
A general-purpose clarification: Useless QRM -- Anything someone else sends that I don't want to listen to. Useful communication -- Anything I send that someone else doesn't want to listen to. (Tongue Firmly in Cheek here =) On 9/28/07, David Michael Gaytko // WD4KPD [EMAIL PROTECTED] wrote: It sounds like a ghastly prescription for useless QRM. you mean like in contest david/wd4kpd Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php Yahoo! Groups Links -- Regards, Robert Thompson ~ Concise, Complete, Correct: Pick Two ~ Faster, Cheaper, Better: Pick Two ~ Pervasive, Powerful, Trustworthy: Pick One ~Whom the computers would destroy, they first drive mad. ~-- Anonymous
Re: [digitalradio] Re: 30 Meter PropNet Weekend October 6/7
Don, I have looked at the PropNet software and what it seems to be doing is acting as an unattended beacon. Also, I am not familiar with any allocated digital PSK31 portion of the band. Are you referring to the the automatic subbands? From Part 97: /(9) Beacon/. An amateur station transmitting communications for the purposes of observation of propagation and reception or other related experimental activities. Isn't this exactly what you PropNet is doing? It does not seem that the receiving stations are connecting with the transmitting station but are reporting their reception through the internet. Both APRS and PropNet appear to operate as beacons if they are unconnected. This is legal on part of 10 meters and other higher bands but not on HF. They don't seem to be operating as automatic stations where they are responding to interrogation by another station. They are just sending out unconnected packets or data which would seem to be a beacon. Does anyone have insight into this and how the rules cover these modes? 73, Rick, KV9U Don wrote: Hi Rick KV9U, You bring up a good point actually and don't blame you for asking the question. First I must say my choice of words might be misleading as I see it because I used `beacon' you might have reference to part 97 section 203 on beacons: http://www.arrl.org/FandES/field/regulations/news/part97/ http://a257.g.akamaitech.net/7/257/2422/13nov20061500/edocket.access.g po.gov/cfr_2006/octqtr/47cfr97.203.htm A beacon may be automatically controlled while it is transmitting on the 28.20-28.30 MHz, 50.06-50.08 MHz, 144.275-144.300 MHz, 222.05- 222.06 MHz, or 432.300-432.400 MHz segments, or on the 33 cm and shorter wavelength bands Again my choice of words 'beacon' is incorrect because actually a PropNet PSK Station is using PSK31 within the allocated digital PSK31 portion of the band and not only transmits but receives other PropNet stations so it is not really a beacon since a beacon as described in part 97 section 203 is described as one way communications. I think the creator and owner of PropNet Ev W2EV had stated before on the question you ask saying: Sure! We operate under the same provision that APRS does in the USA: FCC Part 97.221. Obviously, this applies only to USA stations. http://a257.g.akamaitech.net/7/257/2422/13nov20061500/edocket.access.g po.gov/cfr_2006/octqtr/47cfr97.221.htm You might email Ev W2EV (email [EMAIL PROTECTED] or ask http://groups.yahoo.com/group/PropNET-Online/ ) to ask him for the legal run down on this but to my knowledge it is a legal activity using a legal digital mode or I would not be participating or promoting illegal operation (I think PropNet has been covered by most all major Ham Radio Mags including the ARRL/QST, CQ, etc and Ev involved with the FCC over this subject matter and to date no issues). Again I would not operate or promote this if I thought it to be illegal. I actually have operated PropNet like any other digital mode of communication where as I'm sending out my call and information and receiving others. The neat thing about this is that it's all logged in a database for propagation study and also is set to a map for real time propagation mapping so everyone can see in real time the band activity. I don't know if my response helps but its my honest understanding and thought your question needed a response. We are trying to promote more 30m digital activity and if you can prove otherwise about PropNet then I surely would not promote it. We always have our regular Thursday and Sunday night 30m PSK nights and that has promoted more activity on 30m also (of course other modes other than bpsk31 are being use too). If you have time please give PropNet a look over and you can always use just the `lurker' mode for receive only and still participate by reporting what stations/areas you are receiving. The information will be sent automatically via the Internet to the PropNet map where your location and received stations will be listed. I can't participate the whole weekend and don't expect anyone to 24 x 7 (although in 'lurker mode' you really can participate 24 x 7)but when in the shack I will be sending out my call and participating the most I can. Thanks again for the reply. De kb9umt Don http://groups.yahoo.com/group/30meterPSKGroup/ http://www.30meterdigital.com
Re: [digitalradio] JT65A..first contact
I guess you are using ntp via modem. I am interested in finding a way to sync Linux to CHU, WWV or WWVB using a soundcard and the radio time codes. Does anyone on the list has already done that? How? 73, Jose, CO2JA --- David Munn wrote: for clock accuracy im using the ntp server of au.pool.ntp.org as Dimension4 is only for Windows..clock seems to be accurate Tnx Andy K3UK for a very good jobneed to add some comments for Linux users Hope to see some of you on JT65A David VK4BDJ __ Participe en Universidad 2008. 11 al 15 de febrero del 2008. Palacio de las Convenciones, Ciudad de la Habana, Cuba http://www.universidad2008.cu
Re: [digitalradio] ALE yes ... or no?
On 9/27/07, Jose A. Amador [EMAIL PROTECTED] wrote: In my personal experience, JNOS first, and Linux in second place, have You probably mean Linux kernel-mode AX.25, since JNOS runs fine on Linux =) been a fairly good match to the radio channel characteristics for e-mail and web browsing over AX.25 packet radio. (snip) But something is clear to me: it is IMPOSSIBLE to pass TCP traffic coming from a LAN, keeping LAN access parameters, timers, segment and window sizes without grinding the radio link to HALT with endless retries and repeats. TCP windows sizes up to 32767 may be acceptable on a LAN, but not on a 2 meters voice radio or a 3 kHZ HF radio. Absolutely true! Two or three possibilities: Do what is sometimes done for internet satellite terminals and spoof the TCP state machine by locally generating ACKs, etc then committing to transfer the frames yourself however you see fit. This works fine for some things, terribly for other things. This is great for conditions where the TCP client and server will break if their assumptions are tested (Remember, 99.5% of modern internet apps *assume* ubiquitous high bandwidth, low delay, low loss connectivity, and the timings that go with it) Alternatively, you can create protocol gateways that do non-TCP over the air, with the other end acting like a remote-controlled TCP client. The HMTP smtp-variant can be thought of as one take on this, and it's not too hard to implement a similar thing for straight POP or HTTP. The result will work better (since neither the local-to radiobridge TCP connection nor the remote-radiobridge-to-internet TCP connection needs to have its timing fiddled with), but there are a LOT of non-trivial edge conditions to deal with if you want the thing to work with the internet in the wild. Sadly, not reads internet RFCs every night before bed... =) (snip) packet sizes. Even on 2 meters 1200 baud links, it creates havoc. Heh, you want a feel for exactly how bad the problem is? Try using a GSM/GPRS (others might do this too, but GSM/GPRS guarantees this ability) cellphone to make a 9600 baud dial up connection to an ISP modem (or whatever you have handy). Note, this is *not* whatever high speed connection your provider offers. This is 9600 baud, fairly long latency with occasional latency spikes due to scrambled-and-resent data frames. A lot of modern software does *not* function over this vastly better connection. I've actually seen a client (a chat client, not that it matters) successfully connect, then queue up so much XML status information that the connection *never* succeeded at passing any actual information. (snip) But it is clear to me that you CANNOT expect that a bandwidth bottleneck like a radio link, particularly a HF radio, to perform as a 10 or 100 Mb/s (say) wired LAN. Otherwise, mating a LAN with a radio link without the appropiate traffic downsizing is doomed to failure. A: You need applications that are aware of their link resource, or else are OK with batching traffic and offloading actual delivery to some other tool. B: even 802.11b/g has to significantly adjust the timings under the hood in any enterprise campus location. Much of the inefficiency a large wifi location sees is due to the fact that the actual layer 3 protocol (TCP in this case) timings aren't dynamically adjustable, so layer 2 has to try to provide what layer 3 has been tuned to expect. C: Amateur radio networks aren't best modeled by the modern TCP view of the internet anyway. They're a much better approximation to the old asynchronous-bundle-delivery UUCP days (although we have learned a few things since those days; no need to be mistake-compatible with UUCP =) Most useful things can be turned into bundles that can be transferred to the peer whenever the peer can be reached. Unlike UUCP, however, there must be at least some ability for ad-hoc pathing-peering discovery, since HF is much different than a scheduled telco-hardline dialup link. (snip) There is no problem with RFC821 or RFC822, it is just a matter of what kind of channel access parameters are used. If they are matched to the channel properties, it may be OK, but otherwise, it will be entirely flawed. Yes, in general, rather than trying to cram a legal ham HF/VHF link under the existing internet layer 2 protocols, which at best results in *terrible* efficiency, average throughput (whatever the peak may be), etc, it's usually better to implement application protocols that are a better fit to the channel constraints. Yes, you *can* adapt IP protocols enough so that they'll work; once you've done that, almost all applications written with the internet in mind will break anyway. Just for fun, go look up the timings embedded in the HTTP/1.1 spec, and imagine trying to meet the timeouts over a HF channel. Now note that a large subset of the internet is unreachable from a HTTP/1.0 client... specifically *every* host that uses name-based virtual hosting, which is almost
Re: [digitalradio] Re: center of the waterfall question
Additionally, depending on the filters, the signal may be distorted enough to impact its decodability despite favorable SNR. Usually by the time this is a serious factor, the actual passed signal is obviously too far down, but I've seen it happen once well within the passband of a particularly weird filter. Some modulations are more sensitive than others. -- Regards, Robert Thompson
Re: [digitalradio] JT65A..first contact
I'm not sure what the current status is, but the NTP code has from time immemorial contained modules for those... actually the CHU module (basically a bell 103 software decoder) was what got me interested in software signal processing ;-) On 9/30/07, Jose A. Amador [EMAIL PROTECTED] wrote: I guess you are using ntp via modem. I am interested in finding a way to sync Linux to CHU, WWV or WWVB using a soundcard and the radio time codes. Does anyone on the list has already done that? How? 73, Jose, CO2JA --- David Munn wrote: for clock accuracy im using the ntp server of au.pool.ntp.org as Dimension4 is only for Windows..clock seems to be accurate Tnx Andy K3UK for a very good jobneed to add some comments for Linux users Hope to see some of you on JT65A David VK4BDJ __ Participe en Universidad 2008. 11 al 15 de febrero del 2008. Palacio de las Convenciones, Ciudad de la Habana, Cuba http://www.universidad2008.cu Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php Yahoo! Groups Links -- Regards, Robert Thompson ~ Concise, Complete, Correct: Pick Two ~ Faster, Cheaper, Better: Pick Two ~ Pervasive, Powerful, Trustworthy: Pick One ~Whom the computers would destroy, they first drive mad. ~-- Anonymous
Re: [digitalradio] Re: [multipsk] Re: Tests in ARQ FAE
Steinar; I'll listen for you on 30m and 20M , on 10136.5 now but probably too late. Have heard Europe today so maybe band is improving, will sit on 14109.5 as of 0600Z tomorrow. See if you can get my station to answer John VE5MU - Original Message - From: Steinar Aanesland To: [EMAIL PROTECTED] ; digitalradio@yahoogroups.com Sent: Saturday, September 29, 2007 4:57 AM Subject: [digitalradio] Re: [multipsk] Re: Tests in ARQ FAE Hi Patrick, What about trying 10.136,500 later this evening ? The 30m is a lovely band free from contest qrm . 73 de LA5VNA Steinar Patrick Lindecker skrev: Hello to all, As there is a WW RTTY contest, the 14109.5 frequency is and will not be free. So this ARQ FAE test will be done another day. 73 Patrick - Original Message - *From:* Patrick Lindecker mailto:[EMAIL PROTECTED] *To:* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ; digitalradio@yahoogroups.com mailto:digitalradio@yahoogroups.com *Sent:* Friday, September 28, 2007 11:21 PM *Subject:* Tests in ARQ FAE Hello to all, I will be QRV for tests to-morrow saturday morning in 14109.5 KHz USB at 10h00 UTC, for the ones interested. I will call CQ in ARQ FAE up to 10h30 UTC. A 4.4.2 Multipsk test version in a ZIP test package is available in my site. It contains the Multipsk test version (with ARQ FAE bugs fixed). http://f6cte.free.fr/MULTIPSK_TEST_22_09_2007.ZIP http://f6cte.free.fr/MULTIPSK_TEST_22_09_2007.ZIP Paste this adress in your Internet Explorer or equivalent. Download the file. Create a tempory folder (C:\TEST, for example), unzip the file in it and start C:\TEST\Multipsk.exe (the auxiliary files will be created automatically). 73 Patrick -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.488 / Virus Database: 269.13.33/1037 - Release Date: 9/29/2007 1:32 PM
Re: [digitalradio] JT65A..first contact
Jose A. Amador wrote: I guess you are using ntp via modem. I am interested in finding a way to sync Linux to CHU, WWV or WWVB using a soundcard and the radio time codes. Does anyone on the list has already done that? How? 73, Jose, CO2JA --- David Munn wrote: for clock accuracy im using the ntp server of au.pool.ntp.org as Dimension4 is only for Windows..clock seems to be accurate Tnx Andy K3UK for a very good jobneed to add some comments for Linux users Hope to see some of you on JT65A David VK4BDJ __ Participe en Universidad 2008. 11 al 15 de febrero del 2008. Palacio de las Convenciones, Ciudad de la Habana, Cuba http://www.universidad2008.cu http://www.universidad2008.cu Hi Jose.in most Linux distros such as Ubuntu Fedora Mandriva etc there is a gui for setting the Date and Time under a Settings Menu.i use the KDE desktop so know that one well..i understand that the same is available under GNOME.in KDE it comes up with the GUI and you can set the automatic update of the time so that it uses a ntp server...there are some listed in the gui...the one i use is setup for VK and is useful if any part of the net goes down overseas.a list of the servers can be found by searching on the net. I presume it does the same thing as Dimension4 does for Windows as i notice it uses a net time server Yes this is done via a modem interfacing to the net... i dont know of a way to do this via a radio and a time signal station such as WWV or WWVH... Here in VK the HF time signal stations are very weak or not audible at times due to propagation and the fact there are none down under in the South Pacific. Hope this helps ...any more questions im only too happy to try and answer. David VK4BDJ
[digitalradio] Digital supported in LOTW Contest: 0000 UTC Saturday 6 October 2007 to 2359 UTC
Name: Name: LoTW Contest Contest Periods:PHONE: UTC Saturday 6 October 2007 to 2359 UTC Saturday 6 October 2007 CW / RTTY/Digital: UTC Saturday 13 October 2007 to 2359 UTC Saturday 13 October 2007 PHONE, CW, and RTTY/Digital portions of the contest are considered separate contests and must be submitted separately. All operators may use spotting networks, either RF or internet, as long as the use of the spotting network is open to the general public. Categories: Single Operator CW Single Operator RTTY/Digital Single Operator SSB Band: AB -- All Band (no WARC 12M,17M, or 30M) band QSOs allowed) S160 -- Single band-160M S80 -- Single band-80M S40 -- Single band-40M S20 -- Single band-20M S15 -- Single band-15M S10 -- Single band-10M Power: HP -- Greater than 200 watts LP -- 200 watts or less for the whole contest QRP - less than 5 watts for the whole contest Exchange: All participants use RS(T) and State/Province/DXCC Country. If you are also a participant of another contest, you can additionally send other formatted reports, but for this contest that extra information does not need to be logged. NOTE: If it is determined that an operator is not in the state sent in the report, his entry will be disqualified. Points: QSOs with country, 2 points. QSOs with other countries on same continent, 5 points. Contacts with other continents, 10 points. Maritime mobile contacts count 5 points. There is no lmultiplier value for a maritime mobile contact. All scoring will be automated and assessed when the LoTW QSL log is evaluated. Multipliers: Each continental U.S. State (48), USA District of Columbia (DC), Canadian area (13), and DX country. KL7 and KH6 are considered DX and not states for this contest. DX countries are DXCC plus WAE (IT, GM Shetland Islands, et al). Canadian areas include VO1, VO2, NB, NS, PEI, VE2, VE3, VE4, VE5, VE6, VE7, NWT, and Yukon. Do not count States and Canada as separate countries. For DX stataions, send signal report and DXCC prefix for your country. Example for OM2AK in Slovak Republic, the DXCC is OM, therefore on CW, he would send 599 OM. Note multipliers (countries, provinces, and states) will be automatically determined by the sponsors log-checking software. Same multipliers as CQWW160M Contest. Score:Total Points X Total Multipliers Logs: Contest logs in either Cabrillo Format or ADIF format should be uploaded to LotW any time after the contest, but no later than 30 days after the contest. No hand-written logs or any other format will be accepted. Use the following contest names on the CONTEST: line of the Cabrillo log file: LOTW-SSB or LOTW-CW or LOTW-RTTY. If an adi/adif file is used to upload logs to the ARRL site, then there is no need to include the name of the contest. Elgible Operator: Non-LoTW member stations may operate, but must join LoTW as soon as possible (no later than 30 days after the contest) after the contest to be included and have your LoTW QSLs count for the other members and to be included in the results listings. Submittals: Your contest submittal is your LoTW QSL download report for the contest period, renamed from LOTWREPORT.ADI to Example: Callsign_Category_Band_Power.ADI) and should be downloaded no sooner than 30 days after the contest and no later than 45 days after the contest. Your downloaded QSL report is your contest entry and should be uploaded to http://www.lotwcontest.com anytime between 30 days and 45 days after the contest. To complete your entry, you will fill out an online entry form, on which you will enter, Your Callsign, Mode operated, Class (All or which singe-band), Highest power used, State/Province/Country operated from, and filename of uploaded ADI file, To make this fair to all entries, our log checking software will only count QSLs that are awarded within the 30 days immediately following the contest period. Name your lotwreport.adi file as: Callsign_Category_Band_Power.ADI. Examples: N5RR_CW_AB_HP.ADI or N5RR_PHONE_S160_LP.ADI. Contest loggers use existing setup for Oceania DX Contest and disregard score for the LoTW log. Scoring for the LoTW Contests will be automatically generated by the sponsor once your log is submitted. There will not be any penalty for duplicates since our log checking software will automatically zero out the duplicate contacts on the same band. Busted calls will not be a factor, since there will not be a match and no LoTW QSL will be generated. Same goes for non-LoTW participants which can make QSOs, but their logs would have no way to get submitted into LoTW, hence no QSL generated. Awards: Certificates for High World, High State, High Province, and High Country in each power class. Second and Third place will be awarded as participation requires. All stations making more than 500 QSOs will receive
Re: [digitalradio] JT65A..first contact
David, I do not have full Internet at home, just e-mail. I have been using CHU with the CLOCK program from F6CTE, for Windows. I am running XP now, but this is a dual boot PC. That's the reason I am interested in using the radio to sync my PC, which is necessary to use WSJT or track satellites. I have used gMFSK and FLDIGI ocassionally. I began using Linux with my old 386 and did so for some 10 years also with newer computers. Even when I have three Linux distros installed here nowadays (Ubuntu 6.06 LTS, Slackware 10.2 and Mandriva Spring 2007), I use XP mostly because I need to stay compatible with my students, who use Windows mostly. Open Office has not been entirely compatible for reasons we all know, and I do not want to jeopardize my conferences with some obscure bug to embarrass me in an inappropiate moment. I revived an old russian receiver and I have been even receiving WWVB on 60 kHz from 3200 km away almost 24/7, using my HF G5RV. I have to do my homeworkand build a better long wave antenna...but so far I have not. I know that VNG did shut off some time ago, but maybe you could try JJY on 40 or 60 kHz, if you could, even when I know that you can sync from the Internet. I believe that even WWVH might be too far away from you in this scarce sunspots period. Being capable to sync from a radio is also interesting when you are portable, and away from the Internet. I have never been able to get the NTP sound card code working on Linux. I would have to look for it and download it again. I believe I compiled it a long time ago and some dependencies failed at compile time, I do not remember exactly which right now. Being busy and in a hurry as usual, I left it for some quieter moment...still to be found. Back to comment about CHU, their code seems bulletproof. It either syncs the right time or does not at all. Not the same with the simpler codes that WWV or WWVB use, with a lot of false decodes, that do not harm because I keep a very tight sync window of only three minutes to filter out the false decodes. Thanks for your reply, 73, Jose, CO2JA David wrote: Hi Jose.in most Linux distros such as Ubuntu Fedora Mandriva etc there is a gui for setting the Date and Time under a Settings Menu.i use the KDE desktop so know that one well..i understand that the same is available under GNOME.in KDE it comes up with the GUI and you can set the automatic update of the time so that it uses a ntp server...there are some listed in the gui...the one i use is setup for VK and is useful if any part of the net goes down overseas.a list of the servers can be found by searching on the net. I presume it does the same thing as Dimension4 does for Windows as i notice it uses a net time server Yes this is done via a modem interfacing to the net... i dont know of a way to do this via a radio and a time signal station such as WWV or WWVH... Here in VK the HF time signal stations are very weak or not audible at times due to propagation and the fact there are none down under in the South Pacific. Hope this helps ...any more questions im only too happy to try and answer. David VK4BDJ __ Participe en Universidad 2008. 11 al 15 de febrero del 2008. Palacio de las Convenciones, Ciudad de la Habana, Cuba http://www.universidad2008.cu
Re: [digitalradio] ALE yes ... or no?
Robert Thompson wrote: You probably mean Linux kernel-mode AX.25, since JNOS runs fine on Linux =) Yes, I meant EXACTLY that. Kernel AX.25 can be fooled to endless repeats by TFPCX and an inadequate computer (say, a 286 running some terminal ughh !!) That has been a factual case for endless sysop/nodeop headaches. been a fairly good match to the radio channel characteristics for e-mail and web browsing over AX.25 packet radio. I used PCElm, and some other client with JNOS before I had a phone at home. I had my e-mail that way, using LZW compressed POP3 and SMTP. Not for exchanging photo albums, but perfect for mail contacts and even some ftpmail in small manageable chunks. The beauty of JNOS is the ability to tweak parameters, and topping maxwait, so the it is better able to hold the radio link. Absolutely true! Two or three possibilities: Do what is sometimes done for internet satellite terminals and spoof the TCP state machine by locally generating ACKs, etc then committing to transfer the frames yourself however you see fit. This works fine for some things, terribly for other things. This is great for conditions where the TCP client and server will break if their assumptions are tested (Remember, 99.5% of modern internet apps *assume* ubiquitous high bandwidth, low delay, low loss connectivity, and the timings that go with it) It is a pity I cannot remember the names now, since that bad experience has piled up more than 10 years of oblivion. It was something capable of using a terminal with a packet driver and redirecting packets from 10 Mb/s ethernet to the serial port. It was a chaos generator, even on clear 2 meters channels with agressive fracks. Alternatively, you can create protocol gateways that do non-TCP over the air, with the other end acting like a remote-controlled TCP client. I also used FBB forwarding for SMTP email over HF. It worked, but it needed a fairly clean channel to suceed, since the JNOS version did not implement the Z modem style code of the original FBB forwarding, and if the link failed, it could not continue from the offset it broke but rather had to restart the transfer from the beginning. The HMTP smtp-variant can be thought of as one take on this, and it's not too hard to implement a similar thing for straight POP or HTTP. The result will work better (since neither the local-to radiobridge TCP connection nor the remote-radiobridge-to-internet TCP connection needs to have its timing fiddled with), but there are a LOT of non-trivial edge conditions to deal with if you want the thing to work with the internet in the wild. Sadly, not reads internet RFCs every night before bed... =) Yes, I have read about HMTP but have not actually tried it. I was rereading an article about it yesterday's evening Nevertheless, I already have telephone at home and a V-90 modem, so I have no need to do the past linking acrobatics. Seems there are more than 100 ways to boil a frog (snip) packet sizes. Even on 2 meters 1200 baud links, it creates havoc. Heh, you want a feel for exactly how bad the problem is? Try using a GSM/GPRS (others might do this too, but GSM/GPRS guarantees this ability) cellphone to make a 9600 baud dial up connection to an ISP modem (or whatever you have handy). I have been tempted to try it, but it is E X P E N S I V EI rather use the V.90 modem. Note, this is *not* whatever high speed connection your provider offers. This is 9600 baud, fairly long latency with occasional latency spikes due to scrambled-and-resent data frames. A lot of modern software does *not* function over this vastly better connection. I've actually seen a client (a chat client, not that it matters) successfully connect, then queue up so much XML status information that the connection *never* succeeded at passing any actual information. Linux AX.25 taught me a vastly better implementation than what I had seen in MSDOS and Windows. I used standard browsers and it was usable for ftp and textual HTML. Images seem to be always heavy. You could feel the slowness, but with a lot of patience, it did work, qnd I would say it did its job well. All that at 1200 baud. And I even could finish quite a few ftp transfers on HF at 300 baud. Small files, from 10 to 50 K were perfectly transferable. (snip) But it is clear to me that you CANNOT expect that a bandwidth bottleneck like a radio link, particularly a HF radio, to perform as a 10 or 100 Mb/s (say) wired LAN. Otherwise, mating a LAN with a radio link without the appropiate traffic downsizing is doomed to failure. A: You need applications that are aware of their link resource, or else are OK with batching traffic and offloading actual delivery to some other tool. Certainly. RedHat 5.2 and 6.2, (and possibly others as well) performed as expected in a SLOW link. A feat Windows is uncapable of. B: even 802.11b/g has to significantly adjust the timings under the
[digitalradio] Amateur Radio Newsline Report - RADIO LAW: NFCC ASKS FCC TO DECLARE DIGITAL VOICE REPEATERS THE SAME AS ANALOG
Amateur Radio Newsline Report 1572 - September 28, 2007 Amateur Radio Newsline report number 1572 with a release date of Friday, September 28, 2007 to follow in 5-4-3-2-1. The following is a Q-S-T. The National Frequency Coordinators' Council asks the FCC to declare all digital voice repeaters follow the same rules as analog F-M repeaters, Australia makes ready for digital voice operations and four New England repeaters voluntarily shut down over interference to Pave Paws radar. Find out the details on Amateur Radio NewslineT report number 1572 coming your way right now. ** RADIO LAW: NFCC ASKS FCC TO DECLARE DIGITAL VOICE REPEATERS THE SAME AS ANALOG Is a digital voice repeater really a repeater or is it something else yet to be defined in law? The National Frequency Coordinators' Council believes that anything that repeats voice in close to real time is a repeater, and its now asked the FCC to declare this to be the case. Jay Maynard, K5ZC, is president of the NFCC. He explains the back story that lead his organization to act: -- K5ZC: When D-Star started really taking off, somebody wanted to put up a D-Star repeater. He went to his local coordination council and wanted to put up a 2 meter D-Star repeater. He went to his local coordination council but was told no because we do not have any frequencies available for you. In desperation -- I don't know if that's a truly accurate word but its close enough -- they (the want to be repeater owners) went to the FCC and described what D-Star did in such a way that the FCC -- specifically Bill Cross -- concluded that a D-Star repeater really wasn't a repeater and therefore did not have to operate in the repeater subbands. -- That night be all well and good if it were only D-Star and other digital repeaters that fell into this category. Unfortunately, many of today's analog FM systems alo include a slight audio delay to facilitate control or linking. And it soon became apparent that this opinion by Bill Cross could lead to a lot of problems on the VHF and UHF bands: -- K5ZC: This guy said 'fine' and he put his machine up on 145.61MHz with a minus 1.2 MHz offset and went to town That gave D-Star a foothold in that area, but it also opened up a real can of worms because the way that Bill Cross wrote the message, he said that its not simultaneous because there is a delay in the path between the input and the output. The problem there is that lots of (analog) repeaters have delays between the input and the output. Anyone that's running an RC-850 (controller) or other computerized controller has a delay. And it was only a matter of time before some bright spark read that message and said: 'Ah hah! My repeater does not transmit simultaneously either. Its not a repeater and I can get on outside the repeater subbands and go to town. -- And that's what had frequency coordinators concerned. They did not want to see a return to the repeater turf wars that marked the early days of FM relay operation: -- K5ZC: In the late 1960's and early 1970' there was a lot of proliferation of repeaters. That was really the 'golden age' of repeater construction. And in that era is when frequency coordination first came about because you had people wanting to put their repeaters up all on the same frequency, and that did not work very well -- as you might imagine. Part of the regulation that came down to stem that tide was restricting repeaters to parts of the ham bands so that they wouldn't take over the entire band. After all, there are folks that do other things than operate FM repeaters on 2 meters and on some of the other bands and they have just as much right to operate on the ham bands as repeater operators do. And that's where the restriction (of repeaters) to certain subbanbds comes from. -- After debating the matter for several months as more and more digital voice systems took to the air, the majority of NFCC members agreed that it was imperative for them to let the FCC know that they believe any device that retransmits an audio signal in near to real time is a repeater and should be treated as such.-- -- K5ZC: What the NFCC did was vote to ask the FCC to treat anything that asks like a repeater, as a repeater. This was a formal motion and vote of the council. -- Specifically, the letter states that the NFCC believes that any amateur station, other than a message forwarding system, that automatically retransmits a signal sent by another amateur station on a different frequency while it is being received, regardless of any delays in processing that signal or its format or content, is a repeater station within the meaning of paragraph 97.3(a)(39) of the FCC rules and should be treated as such. In practical terms, it means that D-Star, APCO 25 and any other repeatable digital voice system that comes along would be restricted to operation in the FCC
