Activity Stream

Filter
Sort By Time Show
Recent Recent Popular Popular Anytime Anytime Last 24 Hours Last 24 Hours Last 7 Days Last 7 Days Last 30 Days Last 30 Days All All Photos Photos Forum Forums
  • 2E0JTP's Avatar
    Yesterday, 10:45
    2E0JTP replied to a thread Handheld Radios Vhf in Amateur Radios
    If you want to take one with you in a boat, buy a proper marine VHF handheld. They are about 100-400. They all do the same basic job, the more expensive ones look prettier and make you feel better outfitted, but that's about it. Do a Google/Amazon search for "handheld marine vhf". The Cobra MRHH125 or Standard Horizon HX210E VHF Handhelds are probably the best value at the moment. Remember, the VHF radio licence course doesn't just give you the legal ability to use the radio, it also teaches you HOW to use it properly. That's what will probably save your life, not the walkie talkie.
    1 replies | 53 view(s)
  • 2E0JTP's Avatar
    Yesterday, 10:30
    A handheld radio that can do 27MHz (I assume you mean SSB and AM/FM), as well as 144MHz and 440Mhz, and you'd like 900MHz? I hope you've got deep pockets, because you are going to have to build it yourself. Alinco make a hand held that does 144MHz/440MHz/1200MHz, but not 900MHz or 27MHz Wouxun make a mobile that does 28MHz/50MHz/144MHz/440MHz, but not 900MHz, it doesn't do AM or SSB though, so no good for CB. Even the expensive high end Icom base stations will not do everything you want out of the box, and they start at $1200 and go up to $7000+
    1 replies | 65 view(s)
  • leveikin's Avatar
    Yesterday, 09:29
    leveikin replied to a thread Base Radios IC-730 doesn't increase RF power in Icom
    It appears to be an issue where the radio is cutting power because the SWR is too high. On a dummy load, the radio transmits full power. The internal and external SWR meters show that i never gets above 1.3:1, but the manual says it can safely go to 2:1. I have been able to calibrate the SWR meter on the radio, but I haven't found a setting to calibrate when the output transistors throttle.
    2 replies | 364 view(s)
  • justgotaticket's Avatar
    Thu 17th Sep 2020, 23:38
    I wouldn't use the CB band, I would just like for my radio to be able to use it if I really needed to. I'd buy a $600 radio if I could use it. If it has 33cm that would be a plus but I imagine there is no way one would have all four.
    1 replies | 65 view(s)
  • Jeromp's Avatar
    Thu 17th Sep 2020, 20:44
    Jeromp started a thread Handheld Radios Vhf in Amateur Radios
    Hi I live near the sea in Cornwall, I would like to be able to listen to channel 16 and other channels, I would also like a vhf radio to use in emergency when I'm kayaking. Could you recommend a hand held receiver and also a hand held transceiver for me ? Last time I really used a radio was a CB radio. Regards, Jeremy
    1 replies | 53 view(s)
  • 2E0JTP's Avatar
    Thu 17th Sep 2020, 19:00
    2E0JTP replied to a thread UV5R vs UV82 in Portable Operating
    Looking at Amazon, both these radios sell for less than 30 in the UK (that's about the equivalent of $40 US). Neither of them are very good. They are both bargain bucket hand held radios. If you want to pick up a hand held radio that should be easier to operate and that should work without causing you or other radio users interference or problems, have a look at something like the Yaesu FT-4XR Web Link for about $75. In the long run, and depending on how you intend to operate, you may be better served by picking up a mobile style radio and an external antenna. They can be used at home as well as in a vehicle. They offer much better functionality and potential range, but are useless if you want to keep them in your pocket. :victorious:
    1 replies | 103 view(s)
  • Big Daddy63's Avatar
    Thu 17th Sep 2020, 00:41
    What's the difference, and is the UV82 a better model radio for a beginner like myself. I own a Tenway UV5R Pro which I've been listening on until I take my test later this month. For the most part though, I'd like to know if getting the UV82 would be much of a step up. If not, which hand held would anyone recommend as a next step up.
    1 replies | 103 view(s)
  • brandon lind's Avatar
    Wed 16th Sep 2020, 20:36
    brandon lind replied to a thread Mobile Radios Ic-7100 MARS mod in Icom
    I would be more concerned with asking your radio to transmit through a filter unit it wasn't designed for. I have a big box of old 38-42MHz commercial Motorola radios. They are not being used on 6m because there are too many internal adjustments to the filter components to make it worth my time. A company like ICOM purchases components that are capable of operating on a variety of frequencies. The rest of the radio is designed around just the frequencies it was intended to be used on. Just because you can open up the radio and make one or two simple modifications to change what frequencies a radio can produce doesn't mean the radio can handle operating on them. CB'ers do this all the time, and luckily for them, 11m is close enough to 10m for many radios to operate undamaged. MURS is a similar situation. However, you are asking a circuit that was intended to properly pass 146MHz to operate on 120MHz. The commercial Motorola radios I mentioned can be easily destroyed by programming in a frequency outside the...
    4 replies | 207 view(s)
  • K6CPO's Avatar
    Wed 16th Sep 2020, 18:44
    K6CPO replied to a thread Mobile Radios Ic-7100 MARS mod in Icom
    That radio wouldn't be type certified for use on the aviation bands. I don't understand why people continue to mod their radios, even though MARS is virtually extinct.
    4 replies | 207 view(s)
  • 2E0JTP's Avatar
    Wed 16th Sep 2020, 16:02
    2E0JTP replied to a thread Mobile Radios Ic-7100 MARS mod in Icom
    What are the aviation authority rules regarding the use of wide-banded amateur radio equipment in aircraft, isn't it quite strict?
    4 replies | 207 view(s)
  • WZ7U's Avatar
    Wed 16th Sep 2020, 05:38
    WZ7U replied to a thread Mobile Radios Ic-7100 MARS mod in Icom
    Ungh........ really? Yeah, there's a way - buy a radio built for the task. Why would you consider going cheap on any aspect of an aircraft? Would you use discount store fasteners on the airframe or powerplant? 87 octane gas with e-20 blend? For some reason I find the mindset offensive today.
    4 replies | 207 view(s)
  • Jeanguypataterubberboot's Avatar
    Tue 15th Sep 2020, 13:05
    Jeanguypataterubberboot started a thread Mobile Radios Ic-7100 MARS mod in Icom
    I have just MARS moded my IC-7100 and it works great except It won't transmit on AM on the aircraft band. It will on FM and SSB but not AM which is the aviation mode. I was hoping it would work as I would like to install this radio in a friend's plane. Is there a way to open AM up on that band? Thanks for your help.
    4 replies | 207 view(s)
  • brandon lind's Avatar
    Sun 13th Sep 2020, 23:21
    brandon lind replied to a thread NanoVNA in Accessories
    Its not quite that simple. If I wanted to use my nanoVNA on 75ohm coax and calibrate to the end of that coax, I cannot simply attach a 75 ohm load + open + short, hit cal and be done. If I did that, the calibration would put the impedance marker at the center and call it 50ohm. No matter what ohm load you use during the calibration, the dumb thing considers that value 50ohm regardless of what it really is. The only way I have found to use 75ohm coax with the nanoVNA is to calibrate to the nano's port with 50ohm load and aim for the 75ohm point on the graph while tuning whatever is connected to the coax (because when that's a match, the input is 75ohm). When I attempt to measure accurate impedance values through 75ohm coax, I find myself first measuring the coax length then plotting the measured impedance out on a paper chart normalized to 75ohm (so I can use the constant swr circles as a guide) when accounting for the transformative effects of the coax and its loss. My RigExpert can do 75ohm but calibration...
    7 replies | 1623 view(s)
  • Jisake1's Avatar
    Sun 13th Sep 2020, 19:41
    Jisake1 replied to a thread Help identify Mast in Accessories
    Thanks for your advice. I will plan to install guy wires but not certain of tension. I read where some slack is needed and how professionals even have pulled a tower down at installation. Any advice in this area would be appreciated. I also had second thoughts regarding the lack of cross bracing, but have seen many towers with cross bracing fail on line. I only will have a small 5G receiver on the top, so not to concerned about load twisting. This was not used as a portable tower based on the base plate. Has a tilt down that was mounted next to a residence. Was a grandfather to the two brothers that sold it. (They intended to install but local city codes did't permit towers. Zoning. I have a wide open field so no concerns if did fail. Still, prefer to prevent that as well. Another forum identified as a Tristao in a 1976 cat. Feel that is best reference, as closest to the era and design.
    3 replies | 712 view(s)
  • gnuuser's Avatar
    Sun 13th Sep 2020, 16:23
    most people can type faster than they can write except those who know and have used Gregg short-hand I had to learn it for emergency messaging in the service! but what helps me a lot is that Im also a speed reader. (in excess of 980 words a minute) and with shorthand you can read a message much faster than that! learning morse code is great and where is the fun of using advanced technology such as your computer to send morse code or even messaging! The only benefit of that is you can auto program your morse in a macro and let your computer make and record your contacts while you can go off for a beer or a quickie with your spouse
    22 replies | 32936 view(s)
  • gnuuser's Avatar
    Sun 13th Sep 2020, 16:12
    gnuuser replied to a thread NanoVNA in Accessories
    you can make any size fixture you want for different uses.( I have made different value dummy loads for testing home brew baluns for various transmission lines and cables) its not hard to match them once you have specific values. and gives you a myriad assortment of tools to match any antenna to a broadcast system.
    7 replies | 1623 view(s)
  • gnuuser's Avatar
    Sun 13th Sep 2020, 16:05
    gnuuser replied to a thread NanoVNA in Accessories
    all you would need to make a 75 ohm calibration fixture is the end of an old wireless card antenna like the one pictured below and a 75 ohm carbon resistor.( do not use wire-wound resistor) cut the coax about an inch from the knuckle and strip back and solder resistor as close as you can without shorting it out. verify with a multi-meter that its within the tolerance of the markings and you good to go! these antennas screw directly on to the vna! click on the link to the picture.
    7 replies | 1623 view(s)
  • Psi*'s Avatar
    Sun 13th Sep 2020, 14:53
    Some forums might peg this thread as necro (too old) and archive it to a black hole. However some suggestions might still be pertinent as well as the few authors could update their code. To the topic, I like CWops Morse Code Trainer. It has an online and down loadable version. Online works well but might get interuppted or glitched with internet delays especially at higher speeds. Most useful for me is "freeform" allowing focus on problematic character and combinations -- drill yourself 100 times with those sequences and you will feel improvement. I also use freeform to put standard CW Q codes as well as abbreviations. Great for bumping up copy speed & head copy And, I did learn code long long ago using old fasion methods. Now, I want to go >> 20wpm
    22 replies | 32936 view(s)
  • brandon lind's Avatar
    Sun 13th Sep 2020, 13:01
    brandon lind replied to a thread NanoVNA in Accessories
    I wish it had the option to calibrate to 75ohm. Also, there is a delay feature that doesnt work on mine. Overall, for the price, i am very happy with mine and use it often.
    7 replies | 1623 view(s)
  • apoetwarrior's Avatar
    Sun 13th Sep 2020, 12:58
    Six meters dumb idea ... But why not try typing out the message on your computer... I bet that you type faster then you write. Sent from my LM-Q730 using Tapatalk
    22 replies | 32936 view(s)
  • 2E0JTP's Avatar
    Sun 13th Sep 2020, 12:53
    It all depends on your operating conditions. If you have the room, make an antenna that is resonant on the frequency or frequencies you wish to use. This just takes space, a bit of time, and lots of wire. If you have to compromise on antennas due to space restrictions or because you don't want your backyard to look like a spaghetti factory, then think about using an antenna matcher ( "tuner" ) to enable you to work frequencies that your antenna isn't designed to work on. Just remember, an antenna tuner doesn't tune an antenna, it just matches a 50 ohm impedance, so that way your radio doesn't fry itself with reflected power. A poor signal is better than no signal, but it's going to be poorer than an antenna built for the frequency.
    5 replies | 394 view(s)
  • 2E0JTP's Avatar
    Sun 13th Sep 2020, 12:00
    2E0JTP started a thread Mobile Radios What's happening with Alinco? in Alinco
    I appreciate that all the manufacturers are suffering from a reduction in production capabilities and stock levels have fallen low on certain makes and models due to the lock down the whole world has suffered over the last six months, but Alinco appears to have been hit particularly hard (at least it appears that way in the UK). I know that in the last few years, the top of the range VHF/UHF model, the DR-735 has been produced in Malaysia, and the dual band VHF/UHF DR-638H, and I believe both the VHF and UHF mono-band mobiles, were produced in China by Anytone (AT-588 clones I think?). However, there appears to be virtually no Alinco VHF/UHF mobile radios for sale in the UK. I think there is new (old) stock of the HF model still available, and some of their hand helds are still listed for sale in various stores, but no shops that I can find have stock of any mobiles. Even the secondhand market is pretty dry when it comes to Alinco offerings. What's happening with Alinco?
    0 replies | 152 view(s)
  • gnuuser's Avatar
    Sat 12th Sep 2020, 23:28
    external tuners often work well and actually you can build them quite easily. some from kits are compact and with care are fairly easy to assemble. or you can get a list of components and build them from scratch, I have a chinese kit tuner and built it and it works fine. but due to its size it only has bnc connectors. It is a t circuit tuner. I also built an L tuner from scratch ( with both bnc and pl259 ) its not necessary to purchase one but you can if you want to. to me its more satisfying to build them.::smile-new:
    5 replies | 394 view(s)
  • jcp's Avatar
    Sat 12th Sep 2020, 12:12
    Hello all...I need some help please. I am new to ham radio and my rig is a yaesu FT-950. I just purchased a beautiful Collins 30L-1 amp. My problem is this: the amp only has RF out..no connection in from transmitter, which leaves me with no antenna in for the transmitter. Hence, even with an exciter cable, I cannot get the amp to key. Now I don't want to go any further and "smoke" something without seeking some advise. Can someone offer assistance?...HELP please! thanks, jcp
    0 replies | 123 view(s)
  • Spreelock's Avatar
    Fri 11th Sep 2020, 16:58
    Hey, thanks for the reply. I checked the reviews, and it seems a good start. Though, i'm not sure about getting external tuner or antenna..
    5 replies | 394 view(s)
  • W6BVB's Avatar
    Thu 10th Sep 2020, 20:21
    K6VHF rover team is back together again to participate in September ARRL VHF contest. Team: Alex K6VHF, Vlad WY6DX, Vlad W6BVB This time rover is completely redesigned from wheels to antennas. Many thanks to Alex for his hard work. We will be active on 7 bands constantly moving. 50MHz All modes. H-Loop. 144MHz All modes. 10el. 223MHz FM. 4el. 902MHz FM. 13el. 1296MHz All modes. 15el.
    0 replies | 169 view(s)
  • 2E0JTP's Avatar
    Thu 10th Sep 2020, 18:29
    The FT-450D was designed with new hams in mind. It's literally the perfect HF starter. It's a keeper.
    5 replies | 394 view(s)
  • gnuuser's Avatar
    Thu 10th Sep 2020, 16:47
    gnuuser replied to a thread NanoVNA in Accessories
    I purchased the NanoVNA a while back and watched the you tube videos on it a couple times and read the manual that came with it. I havent installed the software in the computer yet and just recently had the chance to use it for tuning an antenna. 1/4 wave 2 meter ground plane antenna. set up and calibration on the touch screen was easy using the guitar pick stylus. and tuning the antenna took about 1 minute of careful trimming on the vertical and radials. It was surprisingly easy to use! I'm looking forward to studying it in depth a bit later. i agree the delay in getting it was a pain in the arse but all in all it was worth it for such a great little portable device.
    7 replies | 1623 view(s)
More Activity