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  • brandon lind's Avatar
    Today, 03:33
    brandon lind replied to a thread Which Ferrite Core in Antennas
    Ferrites are the one thing in the electronics world thats not standardized. Each manufacturer has its own proprietary mixes. There are multiple manufacturers selling the same "type" ferrite, but they are rarely the same. The best thing you can do is study the website of the company you are buying from. Palomar, Amidon, fair-rite, mouser, just start reading. id start here: https://palomar-engineers.com/rfi-kits/acdc-power-line-chokes
    1 replies | 110 view(s)
  • G7NFP's Avatar
    Yesterday, 16:08
    G7NFP replied to a thread Base Radios Newbee Survivalist question in Amateur Radios
    I done a little research. Google "iridium prepaid SIM cards". You can get one with around 300-500 Min which is valid for 365 days (12 month) for around $500+ USD. Then you need to buy/or rent an iridium handset. There are several different providers. So you need to find the best deal. I reckon it would cost you in the region of 2 grand + to buy 2 handsets & 12 month SIM cards for them. But that price would be reduced after a year if you had bought rather than rented the handsets. So you need to ask yourself. How much it would be worth to talk to your family in the event of such a disaster?. If it was myself, l would say no price would be too much if l could afford it. Fortunately my family lives close enough to me.
    6 replies | 232 view(s)
  • k7mem's Avatar
    Yesterday, 14:15
    Depending on the current propagation, any band can be a extreme distance band. For example, 40 Meters (7MHz) is good for a couple hundred miles during the day. But at night, when F-Layers get higher above earth, radio broadcasts from all over the globe can be heard. Conversely, 10 Meters (28 MHz), at the peak of sunspot activity, can get you 3,000 to 4,000 miles during the day. But 10 Meters will close up at sundown. The simplest effective antenna might be the End-Fed. End-Fed antennas can be problematic if you are transmitting at high power. But you are not. There is a PDF available on balundesigns.com that will give you a good idea of lengths that work for End-Fed antennas using a 4:1 or 9:1 Balun at the feed point. Some lengths are good for 40-10 Meter coverage, while others are good for 160-10 Meter coverage. I have similar data on my web page on the Single Wire/End Fed Antenna.
    1 replies | 65 view(s)
  • 5B4AJB's Avatar
    Yesterday, 13:44
    A shortwave loop should do for now. Now you're talking about a magnetic loop. Single point ground to the radio should be good enough. If you can't set up a nice, short ground to a real earth (stake), leave it disconnected. A bad earth, to mains earth for example, can introduce line noise to the receiver. Test your power supply versus battery noise level. For VHF aircraft, a crossed dipole, or better, a Lindenblad will give good results.
    1 replies | 69 view(s)
  • Tigerbrew's Avatar
    Yesterday, 13:16
    Tigerbrew started a thread Which Ferrite Core in Antennas
    Hi all, a quick question. Does anyone know of any useful and/or particularly good articles about choosing and using ferrite cores/beads/clip-ons etc ? I'm about to build a total shack mains filter and although I'm building to a trusted design so know exactly which ferrites I need, I'd like to investigate the subject further for other applications and some well written info would be useful. Cheers, Steve
    1 replies | 110 view(s)
  • cabinman's Avatar
    Yesterday, 03:08
    cabinman started a thread FTM--100D in Yaesu
    all of a sudden my ftmn100d wont come on..checked fuses all good 13.8 going to unit...power supply putting out correct voltage...any ideas appreciated. this is a new unit
    0 replies | 50 view(s)
  • Jstew's Avatar
    Fri 27th Mar 2020, 20:18
    Anyone know why they only solder one side, thinking about soldering it but not sure if there is a good reason they didnít. New old guy, Kg6jxs, my lisc expired years ago and Iím having trouble getting a new test because of coronavirus. Just gearing up.. FA technician by profession. Iím thinking board flex issues or some sort of tuning? Or lazy/cheap? Thx in socal these days.
    0 replies | 46 view(s)
  • K7KBN's Avatar
    Fri 27th Mar 2020, 18:09
    K7KBN replied to a thread New propagation mode!!! in Propagation
    "... and don't call me Shirley!"
    3 replies | 177 view(s)
  • andrew100's Avatar
    Fri 27th Mar 2020, 17:40
    What kind of outdoor antenna would be effective for the Kenwood ts 590s being used to receive only ? I would be most interested in extreme distance bands. Yous input would be very helpful. Thank you. :listening_headphone:
    1 replies | 65 view(s)
  • brandon lind's Avatar
    Fri 27th Mar 2020, 17:03
    you're probably right...
    3 replies | 177 view(s)
  • G7NFP's Avatar
    Fri 27th Mar 2020, 14:55
    G7NFP replied to a thread Base Radios Newbee Survivalist question in Amateur Radios
    Have a look at "Garmin inreach". The lowest monthly charge is about £14.99 ($18.50 USD). Then compare the contracts from other providers. May get a better deal for am annual contract. The above mentioned price is for a monthly contract. A satellite SIM card is much the same as a cell phone SIM card. Only it costs more. So have a look at the various sat phones on the market & the best contracts to suit your needs.
    6 replies | 232 view(s)
  • andrew100's Avatar
    Fri 27th Mar 2020, 14:53
    I am new to ham radio. I've purchased a Tecson S2000 receiver and would like to connect an improved external PLUG-IN indoor. Would like to improve all bands but especially extreme distance reception. Would like to use one that does not overwhelm the RF input, good signal to noise ratio. The antenna would be located near the unit. I believe the receiver has a coax input for this feature. However, I would need to know if the antenna coax needs to be grounded one end, both ends and information of that sort. Any help with these matters would be greatly appreciated. I've browsed around somewhat but have found no significant information that addresses specific brands and models of antennas for this application. If a small outdoor antenna is applicable I can mount such a device as well if the performance over an indoor would justify such a product.
    1 replies | 69 view(s)
  • G7NFP's Avatar
    Fri 27th Mar 2020, 13:50
    G7NFP replied to a thread Base Radios Newbee Survivalist question in Amateur Radios
    Assuming the disaster would wipe out 2m/70cm repeaters + cell phone towers, you have only one option to communicate with someone over that distance. You did say money wasn't an issue. Therefore your answer is to buy a couple of satellite phones. Not a cheap conversation, charged by the second or Min. But unless someone shoots down the satellite communication will be possible from/to anywhere on the planet. Hope that helps. 73 Jim (from UK).
    6 replies | 232 view(s)
  • 5B4AJB's Avatar
    Fri 27th Mar 2020, 13:48
    5B4AJB replied to a thread New propagation mode!!! in Propagation
    surely they'll be too small for anything below about 10GHz?
    3 replies | 177 view(s)
  • brandon lind's Avatar
    Fri 27th Mar 2020, 08:03
    Who's excited about the thousands of little microwave reflectors Elon Musk is supplying us with? Lets just hope it don't get named Debris Scattering! lol
    3 replies | 177 view(s)
  • brandon lind's Avatar
    Fri 27th Mar 2020, 07:36
    brandon lind replied to a thread Base Radios Newbee Survivalist question in Amateur Radios
    No, CB will rarely ever work that distance. In fact, 11m CB is the least likely to work for 250 miles. That is well outside the ground wave coverage and anything ionospheric will not work as CB cant make short hops (aside from the occasional auroral or sporadic E) because the wavelength is too short to be refracted at high elevation angles and signals are lost to space. This creates a "skip zone" of no signal before the low angle signals hitting the F layer reappear about 1000 miles out. CB is absolutely great for reliable coverage between 30 and 75 miles (depending on terrain), and when solar activity is high, long distance hops are easy (still, not for 250 miles). The only hope of making CB work that distance is to run beams aimed at a common back-scattering point in the ocean and I highly doubt anything reliable will come of it. That distance is going to require a ham license to run HF or high powered VHF. Edit: You could always acquire a few friends with CBs between the two locations and start a...
    6 replies | 232 view(s)
  • KD0QEB's Avatar
    Thu 26th Mar 2020, 23:19
    KD0QEB started a thread Handheld Radios FT1D update woas in Yaesu
    I recently update my FT1D's firm ware and DSP software. I went from FW 1.03 to 3.01 and DSP SW from 1.04 to 4.15. It was a very easy process and all seemed to go well. However, when I tried to load my backup it wouldn't read the file on my 2G SD. So I repeated the process two more time and the same results. Knowing I had the files on my computer I didn't panic, I simply started the Yaesu ADMS-6 programing software and tried to upload the information . . . no luck, I got an error. So I loaded CHIRP and tried this again no luck, only this time I downloaded from the radio so I would get a new "database" from the radio and imported my original database into this one . . . success! I was able to upload my database to the radio and all seemed to work fine, till I tried to save a backup on the SD card. NO LUCK! :blue: The radio will not write to the SD card nor will it read from it or even format the SD card. Other than this the radio works as it always has . . . :joyous: Any help would be appreciated . . ....
    0 replies | 112 view(s)
  • k7mem's Avatar
    Thu 26th Mar 2020, 20:32
    This may help get you started. There is software called Fldigi that already displays WEFAX. The software is free, open source, and is designed to work through the audio ports on your PC. It does much more than just receiving WEFAX, but there is no requirement to use it all. For a receiver, I would suggest a SDR (Software Defined Radio). A SDR is effectively a wide band receiver that runs on your computer. With a SDR and Fldigi all you need to do is steer the audio from one to the other. Details on configuring a SDR and Fldigi can be had on a web page written by WB8LZR. This approach would minimize the need for hardware building skills and maximize your software knowledge.
    1 replies | 74 view(s)
  • lomasjr's Avatar
    Thu 26th Mar 2020, 14:15
    I am looking to create a fixed frequency (4317.9kHz) USB SSB receiver to listen to NOAAs New Orleans weather fax transmissions. The intention is that the receiver could be patched via a 3.5mm cable into a PC's microphone input to then decode the transmission. Does anyone know of any designs out there that would work? I am a rather amateur hardware builder but quite experienced writing software. I appreciate any comments and thank you in advance.
    1 replies | 74 view(s)
  • ivoimg's Avatar
    Thu 26th Mar 2020, 13:49
    ivoimg replied to a thread Base Radios Newbee Survivalist question in Amateur Radios
    Will C.B. go that far?
    6 replies | 232 view(s)
  • Raiyan's Avatar
    Thu 26th Mar 2020, 12:34
    I have this antenna lying in the store for the last 2-3 years. All I know it is 9db uhf once used to cover a repeater frequency somewhere between 450-470 MHz. Want to know the brand and spec and find out if I can use it still. Thanks https://www.amazon.co.uk/photos/share/1KcDux76sOiKfrowK9ReC3WiEIkpv2Ffu2TsDjGl5I5 https://www.amazon.co.uk/photos/share/M4oMeTlOHQc3tRf1Sy5jjYePFtzysoJy5LKLAMCKqz8 Thanks for your feedback Raiyan
    0 replies | 71 view(s)
  • K7KBN's Avatar
    Thu 26th Mar 2020, 00:16
    Probably more than you need, but here's a link: https://tinyurl.com/udnoudp This is regularly updated.
    3 replies | 143 view(s)
  • 5B4AJB's Avatar
    Wed 25th Mar 2020, 22:55
    5B4AJB replied to a thread Base Radios Newbee Survivalist question in Amateur Radios
    Maybe C.B. radio is the way to go? It's a pretty long way (maybe 250 miles) VHF & UHF amateur gear would be a pretty penny for a reliable repeater link, plus you'd have to be licensed at both ends. H.F. is not guaranteed either, like C.B.
    6 replies | 232 view(s)
  • xdm's Avatar
    Wed 25th Mar 2020, 20:46
    Thank you, I opened my baofeng UV-5RV2+ and saw it was part 90. I'm looking at FRS radios and an example of a part 95 radio would be a Midland GXT1000 radios. A baofeng BF-888S radio would not be part 95 but part 90. If i'm wrong let me know.
    3 replies | 143 view(s)
  • k7mem's Avatar
    Wed 25th Mar 2020, 20:42
    The Code of Federal Regulations included those "parts" under TITLE 47 (Telecommunication), CHAPTER I (FCC), SUBCHAPTER D (SAFETY AND SPECIAL RADIO SERVICES). Part 90 covers PRIVATE LAND MOBILE RADIO SERVICES Part 95 covers PERSONAL RADIO SERVICES Part 97 covers AMATEUR RADIO SERVICE Each of those parts contain multiple SUBPARTS. You can read them all at gpo.gov.
    3 replies | 143 view(s)
  • WZ7U's Avatar
    Wed 25th Mar 2020, 20:01
    WZ7U replied to a thread Hi from Poland in Introduce yourself
    Hi Adrian! Nice to meet you, I'm Eric wz7u. I live in extreme northwestern Oregon USA with my wife and collection of critters. Looks like we share many interests including radio. I pray you and yours can escape this viral stuff going on in our world, and I hope to work you from your mobile some day on the radio. 73! Eric
    1 replies | 124 view(s)
  • xdm's Avatar
    Wed 25th Mar 2020, 18:15
    What are they from the FCC and what do they mean?
    3 replies | 143 view(s)
  • ivoimg's Avatar
    Wed 25th Mar 2020, 13:33
    ivoimg started a thread Base Radios Newbee Survivalist question in Amateur Radios
    I'm a 65 year old grandfather who would like to be prepared in the event some parts of the communications grid fails due to natural disaster or other causes. I live near Houston, TX and have kids in Dallas, TX. I want to put something in both of our houses in preparation for a disaster so we can communicate. Money is not a big issue here, just want something that will work. Thanks.
    6 replies | 232 view(s)
  • k7mem's Avatar
    Wed 25th Mar 2020, 13:25
    Well first, you need to let us know, approximately, on what part of the planet you reside. Amateur Radio rules and regulations change depending on what country you live in. Second, "ham" is not a acronym and is not capitalized. It's just "ham". There are lots of "ham" radios available. But note that, to use them it usually is required to have a ham license. In the US, getting a license is relatively simple. To get a Technician Class license, which would allow the use of VHF/UHF hand held radios, you only need to pass one test. If you go to QRZ.com there are Practice Exams available. These practice exams are made from the actual question pool that is used for testing. You can take the sample test, as many times as you need to. When your scoring over 90 percent, regularly, it's time to go for the real test. The current situation, with everyone being isolated, most testing stations are closed. However, they are starting up a new on-line site. I believe that there is some information for the on-line...
    1 replies | 89 view(s)
  • k7mem's Avatar
    Wed 25th Mar 2020, 12:53
    k7mem replied to a thread di-pole antenna in Introduce yourself
    Welcome to ham radio. But note that, "ham" is not an acronym and is not capitalized. It's just "ham". To start, you can look around the internet to find most of the information you need. For example, take a look at my web page on the Center Fed Half-Wave dipole. That page provides the equations for a Half-Wave dipole in both US/Imperial and Metric dimensions. This same information exists on many web sites. A simple dipole is pretty easy to build and erect. But note it is usually only useful on one band. My web site, and many others, describe antennas that can be used on multiple bands. Just take the time to understand a little bit about antennas.
    2 replies | 106 view(s)
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