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==D-Star Notes==This is the web site that I registerd my callsign*https://n7arr.dstargateway.org/Register.doYou are not assigned a number as you ar with DMR DMARC. Wait about 24 - 48 hours.The D-Star repeater is located: Downtown on the 1st Nat Bank building.----- 2m repeater is perm linked to 002C reflector .. one of 60 or more The Omaha repeater is a "node" which connectors to a "reflector" 70cm dynamic but usually sits idle local communication. K0OQL can login and change the 70cm repeater to whatever reflector.-----DTRS goes to the APRS site.Net: 1st and 3rd Wednesday of the month - D Star net 9:00pm twice a month-----145.175 and you have to know the repeater callsign and deck. C is always VHF and B is UHF. Everything is 8 digits.== FCC Title 47 of the CFR ==See: [[FCC Title 47 of the CFR]]== Idiots Say Break ==*This dumbass is just wrong -> http://www.k6arp.org/the-proper-use-of-break/*Quotes the ARRL "dont say break" -> http://www.hamuniverse.com/repeater.html*http://www.nobarc.org/How%20to%20make%20a%20call.html== 220 Promote the Band Net =====Friday, July 14, 2017=== kd0vub Dave (NC) Papillion NE kd0cvg Ed Omaha NE==VHF Propagation=====tropospheric ducting===[http://www.engineeringradio.us/blog/2010/05/e-skip-tropospheric-ducting-and-other-vhf-propagation-phenomena/ E-skip, tropospheric ducting and other VHF propagation phenomena]By Paul ThurstWhile the FM frequency band (88 to 108 mHz) is mostly line of sight, there are things that cause long distance reception hundreds or sometimes even thousands of miles from the transmitter. For a radio engineer, this can lead to all sorts of problems. Some serious like STL cut outs, and some quite funny, such as the general manager panicking when several new stations suddenly pop up in town. One of the many jobs of a broadcast engineer is to avoid problems and fix them if they show up (preferably the former).The first and most common of these phenomena is Tropospheric ducting. This happens in warmer weather when there is a high pressure system nearby and is more prevalent over flat terrain. What happens is a warmer layer forms in the atmosphere above a cool layer. That is why it is also known as “temperature inversion.” This causes a higher refractive index, which means that normally the signal would carry on out into space, however, upon encountering this warm layer it is bent back to earth. It can last a few minutes to several hours. It effects all frequencies but is most prevalent above 100 mHz.In some more sever cases, FM stations can travel 500 or more miles and override the local station’s transmitter site 15 miles away. In the age of digital STL’s, co-channel and adjacent channel interference can cause the STL receiver to unlock and mute. Analog STL’s will become hissy or drop out altogether. It can be a big problem.Unfortunately, not a lot can be done about main channel interference. It will go away eventually, and no, the station causing the interference is not operating illegally or any other thing. One consolation, if the duct is open in one direction, it is also open in the other, so say hello to all your new temporary listeners in East Podunk.As far as STL paths go, the best defense is to have a good strong signal at the receive site. Boosting the signal with a preamp at the back of the STL receiver will not do anything. Larger, higher gain antennas at the transmit and receive will help, more transmitter power will help. Sometimes diversity receive antennas will help because at the 950 frequencies 100 feet or so of altitude may make all the difference. Other than that, things like a backup RPU path using a lower frequency, a backup T-1, a backup ISDN line, a Comrex Matrix, basically anything to restore programming.There is a tropospheric ducting prediction site called Worldwide Tropospheric Ducting Forecasts. They produce daily maps and predictions based on weather patterns.The next propagation type known to abnormally affect VHF frequencies is called Sporadic E or E skip. This happens went ionized particles appear in the E layer of the ionosphere and it is more prevalent during the high period of the sun spot cycle when the atmosphere is unsettled due to solar storms. It is more likely to affect frequencies below 125 mHz, so main channel interference may be noted, but STL’s and other broadcast auxiliary services will not likely see any effects.This can happen anytime of the year in any terrain and in any weather condition although it seems to be more prevalent in summer and for some unknown reason, around Christmas.Ionospheric propagation is also known as skywave and is responsible for long distance communications in the MF (AM broadcast band) and HF (Shortwave broadcast band).During sunlit periods, the Ionosphere breaks down into several layers; the D layer, which is responsible for absorption of AM signals during the daytime. The E layer, which normally reflects signals less than 10 MHz. The F1 and F2 layers, which primarily effect HF and lower VHF, from 10 – 40 MHz or so.During sporadic E events, the E layer becomes heavily ionized in specific small thin areas, sometimes called clouds. This can last a few minutes or up to several hours. The effect is normally more pronounced with lower frequencies.In this internet age, there is, of course, a website that can predict or at least define sporadic E, DXMaps.com has maps similar to the tropospheric ducting maps above.Occasionally, solar storms will effect communications on all frequencies. The last time I heard this was in the last sun spot peak around 2000 or so. I was listening to the radio and all the stations faded for several seconds. It turns out a huge solar flare had erupted and send a stream of particles through the Earth’s atmosphere. I happened to be driving down the road and immediately my cell phone started ringing. Listening to the panicked program director on the other end, you’dve thought the earth has stopped spinning on it’s axis. Anyway, it does happen once in a while.Be Sociable, Share!===VHF Propagation Map===link: [http://aprs.mountainlake.k12.mn.us/ VHF Propagation Map]==Current Events==<big>'''UPDATE:''' 9:39 AM Thursday, November 09, 2017</big> Professionals in certain fields, such as law enforcement, become trained in spotting liars, but the rest of us can still hone our detection sensors in everyday life. Lying takes more cognitive effort than being honest in general, because you have to work harder to keep your facts straight. This is where I continue to notice discrepancies in the claims of a local ham. Many people will embellish a bit when discussing their abilities and achievements, which is something we all learn though our struggle in everyday life trying to climb the ladder and get ahead. However, when a ham continues to make claims about his ability on an open repeater without the slightest knowledge or background to sound credible, it becomes a nuisance. In many venues the person would be called out within a short duration of their gross exaggeration, except on a specific local repeater where most of his fans seem clueless enough to not realize what's going on. Pay attention to the discrepancies, misuse of terminology, and struggling to answer specific questions and you will quickly be able to identify this individual. Perhaps if you are more gentle and diplomatic than I, you can help this person pull back the reins on the fabrications so that he can actually listen and learn something. Eventually people will figure him out and it would be better for him if the issue was corrected before it reaches critical mass. <big>'''UPDATE:''' 19:54 Sunday, January 08, 2017</big>KE5HSA was asking me about mounting a dual band antenna to a Jeep Wrangler. What I used I purchased from eBay. See Links:*[http://www.ebay.com/itm/CB-Antenna-MOUNTING-BRACKET-Drivers-Windshield-for-2007-2017-Jeep-JK-Wrangler-/271913047117?fits=Make%3AJeep&hash=item3f4f47d44d:g:peMAAOSw~gRVjRjC CB Antenna MOUNTING BRACKET Drivers Windshield ~ for 2007-2017 Jeep JK Wrangler]This seller offers both a drivers side and passenger side mount. I prefer the drivers side so that the ham antenna is not in close proximity to the broadcast radio antenna. However, the seller does offer a [http://www.ebay.com/itm/CB-Antenna-MOUNTING-BRACKET-Passenger-Windshield-for-2007-2017-Jeep-JK-Wrangler-/271913047453?fits=Make%3AJeep&hash=item3f4f47d59d:g:ne8AAOSwMmBVjRjp passenger side mount] as an option. You could go all hard core ham and stick one on both sides!<big>'''UPDATE:''' 12:37 AM Wednesday, January 04, 2017</big>Happy New Year! Today I updated the landing page for the web site at http://www.w0dbw.com/ and also the email system is now functional including the ability to send messages to gmail users.<big>'''UPDATE:''' 6:59 AM Friday, September 02, 2016</big>I've owned a D-Star radio for nearly a year now and never taken the time to try out the D-Star digital mode. The first step is registration of my ham callsign which gives me access to the D-Star network. *https://n7arr.dstargateway.org/Register.doThis is similar to the DMR DMARC registration with the exception that D-Star does not use the unique ID number, it is based entirely on the callsign, which makes sense since it too had to be unique. I am not a big fan on the digital modes, there are too many of them and none are completely open, as they should be. <big>'''UPDATE:''' 11:18 PM Saturday, August 27, 2016</big>The Hawaii QSO Party was taking place today, and there was much ado about a female operator on 14.228MHz. Conversations on a couple local repeaters involved who was able to get though the pileup on 20-meter to make contact with "Ann." I had to give it a go. Using my humble NVIS fence antenna which I made primarily for 80-meter I tuned it to 20 and starting putting out my call sign. It took about 20 minutes of trying and waiting my turn to achieve a successful QSO with kh6w in Hawaii. She was using a club / contest call which I may not have copied correctly: kh6lhn. I asked for her own call sign which I can now add to my log. kh6w Ann hawaii 10:51 PM Saturday, August 27, 2016 14.228<big>'''UPDATE:''' Thursday, August 11, 2016</big>My 220 promote the band activity includes the creation of 3 new wiki pages...* [[1.25 Meter Ham Radio Band]]* [[1.25 Meter Ham Radio Transceivers]]* [[1.25 Meter Ham Radio Antennas]]<big>'''UPDATE:''' Saturday, July 23, 2016</big>I have been very patient with NPPD (Nebraska Public Power District) on trying to get them to correct the high levels of RFI coming from the power lines in the alleyway behind my residence. The poles are not properly grounded, and their own contracted engineer advised them to correct the problem. Instead of going to work on the problem, the area supervisor "Mick" insists that grounding the poles is too expensive and that all the RFI is coming from the US Post Office 5 blocks away. He even denied what their own engineer had determined to be the problem. Do you think maybe it is time to contact the FCC?<big><big>NPPD - Noise Pollution & Powerful Discharges</big></big><big>Updates to the Plattsmouth ARC Web Site!</big> - Visit http://www.kb0smx.org and see whats new on our club web site.<big>'''UPDATE:''' Wednesday, June 29, 2016</big>You can see our Plattsmouth Amateur Radio Club Field Day results:* www.kb0smx.org - Plattsmouth Amateur Radio Club web site.'''UPDATE:''' Archived and Compressed older posts... '''UPDATE:''' Saturday, June 18, 2016Rich WA0ZQG announced 2m Simplex Freq cleared for field day use.* http://www.arrl.org/news/use-of-146-52-mhz-fm-simplex-frequency-cleared-for-arrl-contests'''UPDATE:''' Monday, June 13, 2016[[File:arfieldday.png]]<big>'''Field Day is June 25 - 26''', and the Plattsmouth Amateur...'''UPDATE:''' Tuesday, May 31, 2016Have you been listening to the PL tone debate on the 146.820 repeater? Don't be confused by what you are hearing. Read my memo on how a simple PL tone can benefit SWIARC repeater users without denying those without a tone board access to the repeater.<big>SHORT MEMO: [[W0DBW- Disambiguation on Repeater Tone Encoded Squelch and How PL Can Benefit SWIARC]]</big>If you understand CTCSS, then you will see the benefit in what I am suggesting.</big>'''UPDATE:''' Saturday, May 28, 2016According to the FCC [...] approval of my new vanity callsign which I will now be using, w0dbw. The vanity callsign uses my initials ...'''UPDATE:''' Wednesday, May 25, 2016Recently I purchased a second [[TYT TH-9800]] not because [...] However, the radio was not as described. See my youtube video: https://youtu.be/aZbn8fq5UBU Caveat Emptor! ''May 15, 2016'' - The TH-9000D is an FM 65W 1.25-Meter radio. WB0YLA is a repeater in Omaha on the band. 224.760 Mhz, -1600 offset, 146.2 PL. Open repeater located at 156th & Maple.''April 18, 2016'' - Installed Ringo antenna on top of the tower. [[Image:Onthetower416sm.jpg]]<BR><small>''Yeah, that's me wearing my ANSI Z359.1-2007, OSHA 1926.502 compliant safety gear'' </small>''March 18, 2016'' - I put the 70cm Yaga beam up on the tower today. Now it is much easier to hit the Omaha UHF repeaters. SWIARC is testing digital mode on their .82 repeater [...] Signal strength for me when from a 6+ down to 2 on the S-meter. It will be interesting [...]When I was transmitting on my old Kenwood TR-7400A today, using an omi on the roof several feet from the UHF yagi which is up on the tower, the Kenwood on full power wiped out the front-end on the UHF rig I was using, causing it to go nutty and shut itself off. It seemed to come out of it after being reset. I was a bit worried that it was toast. Reflected signal is low coming in the cable on the Kenwood, however, there is a lot of RF in the shack on full power transmit. The radio itself is a strong emitter of RF coming out of the case, more so than the newer radios. I am going to start setting my coffee cup on the Kenwood when I use it, so the stray RF keeps the coffee warm.I have been studying and experimenting more with cross-band repeat[...]. Updates to how it works and what is permissible by the FCC can be read on the wiki page about [[Ham Radio Cross Band Repeater]]. Maybe I will discuss [...].<big>In my area our local ham group, the Plattsmouth Amateur Radio Club, we have been experimenting with DMR and SDR. The club president, KB0OGO, did a demonstration of SDR with his new SDRplay receiver. KI0PY has demonstrated [[MotoTRBO]] with a Motorola branded HT while I have recently obtained the [[Tytera MD-380]].I've been building antennas, with my most recent endeavor to build a 6-meter "squalo" horizontally polarized antenna. There is a local 6-meter [...].</big>