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kidphc

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Posts posted by kidphc

  1. If your antenna is 100 feet in the air an additional 1.5 db might be worth it.

    As you increase db the antenna's radiating pattern on an omni-directional antenna gets flatter. It sends more of it signal to its horizon. I would recommend plugging the info into a one of the free typographical antenna coverage calculators to quickly ascertain if it is worth it.

    They changed this tool it seams. It use to allow you to map it out and set each site differently with gain and antenna values. This is what I use to recommend. https://www.scadacore.com/tools/rf-path/rf-line-of-sight/

    Have you thought about a yagi on with a TV rotator?

    Sent from my SM-S901U using Tapatalk

  2. I had a blast this weekend on 10 meter dx.  I was able to talk to people in Italy and Bavaria and a lot of contacts to Texas as well.  All on 20 watts and a dipole at 30 feet high.  What a fun hobby.  
    Yeah, was listening on it was pretty wild how good it was. Meanwhile, 11m(cb) ssb was dead. 40m was cranking as well.



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  3. For GMRS, I use the Vertex VX-4207 in house and truck. For GMRS/Ham HTs, I use the Anytone D878UVii.
    For Ham in my other vehicles it's a mixture of the world famous and much coveted Kenwood TM-V71a dual bander and Yeasu FTM-400XDRs.
    Each of my motorcycles are equipped with the V71a.
    51216437770_38552f8cf8_k_d.jpg
    51217214355_065100fa48_k_d.jpg
     
    I know those mounts.. at least it think i know the owner/fabricator for that goldiee...

    Either case, back to the op.

    My current favoriteamateur/gmrs ht that i grab, is the Harris XG100P. Dream is the APX8500 HT.

    For mobile, it's the XG100M and FTM400XDR both suit different digital modes.

    For the base, I use either the CDM1250 or XTL5000 for GMRS. The FT991a for everything else amateur related, can't mod the UHF/VHF side sadly.

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  4. Gone to Toronto multiple times. Truck looks like a porcupine.

    Never questioned, never asked by either Canadian or US border patrol. I do carry all my FCC paperwork with me (amateur technician). Pretty sure now I mention it I will be stopped next time.

    Also my gmrs radio in the truck is an xtl5000, which is usually tuned into local p25 amateur repeaters.

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  5. Standard UHF rules apply. Get it the antenna up high. 5 miles or so can be rough with HT due to terrain and obstructions.

    Base stations probably would be able to do it no problem with 20w. Fortunately these radios are under $100 usually. Unfortunately, the antenna and power supplies add to the cost.

    Plus your 9 year might be ptt shy on a repeater. Yes, most of the community is great but there are still a-holes out there.

    Gmrs was meant for exactly what you are trying to do.

    I would suggest looking at cheap ip ht radios as well. The conversation will be local to your group over an internet connection. Yes, it's not true rf to rf. But hey you are trying to fan a spark.

    I would also suggest looking at getting him on a Santa net. Dstar has one, requires a Dstar radio. If you are a general with a decent setup the wheelers have one on 80. You know where another ham relays to Santa, so the kids can talk to Santa at the North Pole

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  6. As well as people like me whom are more visual then auditory. I find it easier to identify signals and their types visually than listening to the signals.

    Doesn't hurt that the entry cost for it are as minumum as you want. So it is worth a try. Usually, a cheap RTSLDR dongle is under $80. The software for basic usage is free or minimal in cost. Tons of articles on setting up antennas. There is very little that is as cheap with the same flexibility and versatility in the radio world.

    Sent from my SM-S901U using Tapatalk

  7. As this topic comes up now and then, I thought I would summarize, again, how to expand the versatility of these inexpensive mini-mobile devices for use on GMRS:
    1) With the power off, hold down the V/M button and turn the power on
    2) Note the firmware version number and jot it down for future reference, such as "V3.0"
    3) Note that the MODE is GMRS. Using the Up and Down arrow buttons, change the Mode to (136-174)(400-470) and turn off the Power.
    4) Using the CPS programming software (I prefer version 2.02 of the Radioddity programming software which works on both radios), install the GMRS code plug attached below.
    You now have more control over the radio using the microphone buttons, as well as other expanded features, such as full 500 programmable channels available for many more repeaters as you travel.
    Enjoy!
    Anytone AT-779UV GMRS 202310130140.dat
    Note: Those that do this should know. The radio is no longer type 95 certified.

    Not like any one is going to hunt you down. You will be able to transmit outside of gmrs band even between interstital frequencies. There are lmr frequencies assigned and licensed there. Which could get you into a bit of trouble, if a digit or number is off.

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  8. Dude I agree that it's annoying but why don't you start a thread in the "MYGMRS section" with a poll that people can vote on in hopes of changing the format or be a man and make an appeal to [mention=5]rdunajewski[/mention] the owner.  
    I didn't complain about your complaining, I pointed out that it wasn't the new guys responsibility to change how the site works and it wasn't cool of you to put it on him. You don't like it that much get off your ass and try and change it and stop taking it out on others. 
    Had no clue till now. Basically almost always use Tapatalk, which there isn't even an option for it.

    Sent from my SM-S901U using Tapatalk

  9. I never thought about stretching this Transverter from 450 to 467 to see if an Icom IC-7300 can operate on the GMRS channels.
    Nice challenge! 
     
    http://files.mygmrs.com/forums/monthly_2024_11/Screenshot2024-11-26at10_34_56AM.png.fed69e743e2b12525f670ff06adc64dd.png
    You can certainly use a transverter. For 2m/70cm work it ended up with the ft991a. It can't be unlocked for GMRS.

    I mean most of the GMRS users are looking at Baofengs be it a uv5r or a gmrs locked variant. So a 1k HF radio isn't normally on the radar. Plus GMRS gains nothing from having a waterfall

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  10. Greetings everyone,
    I am hoping to get an antenna recommendation for someone that lives in an apartment.  I have a HT that can hit my local repeater, but people say that its a bit scratchy and I have to be right next to my window to get good signal for transmit.  I am looking to get a mobile station ( home base station.....why are there no radios like the iCom 7300 for GMRS??) and want a good antenna with a ground plane already on it.  I won't be able to mount the antenna outside and/or punch holes through the walls for a cable being in an apartment, so I'm looking for something that can be inside near the window.  Already have power and my mobile unit (at least my first one) picked out, just need an antenna. 
     
    Thanks in advance
     
    David
    First off. Something like a ic7300 is a massive overkill for GMRS. Akin to a nuclear bomb to kill a fly. Most people will not even attempt to buy it.

    Secondly, there are great mobile radios. Like the wooxun kg series, older Motorolas/kenwoods all the way down to something like a db20g.

    Lastly, I wouldn't want a 50w mobile rig blasting away with an antenna inside that close to me. I have friends that do something similar, but they were mentally off to begin with.

    You can also cut a 2x4, and make a psuedo pass through for a window or sliding door (if you have a balcony). I perfer the balcony route for the antenna, since you can dress the antenna to look like a plant from far away, it's outside. There are several reasons for it, more than rf exposure, electro magnetic waves tend not to like some structures more than others. This is why you need to get close to the windows with the ht, a lot of the signal is getting attenuated by the building structure.

    Sent from my SM-S901U using Tapatalk

  11. Okay that ties in with the info on it being a requirement for gmrs. Being newbie I needed more than one confirmation of the reality! Thank you! It is possible that it is a non gmrs repeater, it did not specifiy. I have listened to several informative in depth communications on the repeater. I am having enough .... difficulty with the radio, lack of documentation and repeater etiquette that I am currently full up. Will wait to venture forth, but again thanks for the possibilities.
    Glad you are getting it.

    I should rephrase the part about listening to the output. You "can" transmit it just will go over simplex not be heard by the repeater.


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  12. I am attempting to program a repeater that does not have the standard +5Mhz into my radios. The radios I  own, a Radioddity GM-30 and DB20G do not seem to allow this and the seeming lack of documentation is perplexing. I have been advised that this is a specific radio issue and it is also a FCC requirement for gmrs radios... Another internet and word of mouth conundrum ie: pain. Thanks for any clarification, information and or documentation
    Is it a non gmrs repeater?

    Why I ask? The gmrs repeater frequencies are set by the FCC. Set with a +5Mhz offset. Unlike amateur radio repeaters, you can not have a reverse offset and remain compliant.

    Even then a way to "monitor" a repeater is simply listen to the output frequency. You just won't be able to transmit.

    For the db20g, you can three finger salute the radio in "open it up". So you can bypass the firmware locking for GMRS. I don't condone it.

    Sent from my SM-S901U using Tapatalk

  13. Amateur radio 23CM 1240mhz to 1300 mhz, it could have been a DSTAR signal which Icom has radios that do dstar in 23cm.
    january_2016_spectrum_wall_chart_0.pdf
     
    I have seen dstar signals on the sdr. It wasn't anything like a digital fm signal.

    We confirmed as a nearby aircraft pass. Probably on a glide path. Which would make sense that a radar altimeter was engaged.

    The signal looked like a giant diamond on the waterfall.

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  14. Interesting, so the signal starts narrow and then spreads out, and reaches about +/-2.3kHz deviation from center, with no hotspot down the middle.
    If you speed up the waterfall (is that an option for you), does it start to show any more detail?
    Not that we have seen it narrows back down and slows down in speed and width.

    It is intresting to see. It's right inside of the fm portion of the band plan. Just a bit higher than the atv portion.

    I thought it could be a smart meter but those are in the lower section of UHF same with radar which should be in the 1 GHz portion not 1.2 GHz of the 23cm band.

    Sent from my SM-S901U using Tapatalk

  15. Buddy ran into something on his waterfall. We both have been scratching our heads. The ham group on Facebook says it's radar, it could be hence the shifting width of the signal. It's just nothing like any Eldar signals I have seen. Although, we can't rule it out. He is close enough to 3 international and 1 community airports.

     

    Originally, I thought it was a spread spectrum signal because of the stepping.

     

    Hoping someone else has seen something similar.

     

     

    Link to the Facebook post, for those that don't want to download the videos.

     

    https://www.facebook.com/share/v/1AfUqPiQaZ/https://cloud.tapatalk.com/s/673e2262d4234/VID_20241120_124934%20%281%29.mp4https://cloud.tapatalk.com/s/673e226aa6fa6/VID_20241120_124934.mp4

     

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  16. Do you have anything empirical for power loss. I guess to get accurate numbers you'd have to sacrifice a bunch of mounts and coax (nmo, mag and glass mounts). You know removing variables by clipping coax to as short as possible equally across all the mounts.

    Although, any antenna is better than no antenna. I was under the impression that the power loss through glass mounts as well as it's rated power handling are severely limiting.

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