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Lscott

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Everything posted by Lscott

  1. The official NOAA weather channel frequencies are on VHF. However some have discovered that the studio to transmitter site audio link at times is done on selected UHF frequencies. You can look at the attached file and see what kind of luck you have with it. NOAA UHF Weather Link Frequencies.pdf
  2. I would HIGHLY recommend you read over the GMRS service rules. It will save you asking some questions later on. https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-E Getting familiar with the channel frequencies/channel numbers/power level allowed helps when reading various posts. https://en.wikipedia.org/wiki/General_Mobile_Radio_Service Finally getting the hang of how the whole repeater thing works helps a lot when trying to figure out how to program your radio. This topic seems to trip up a lot of first time users. https://woofthebeatenpath.com/how-do-you-use-a-gmrs-repeater-for-longer-range/ https://www.youtube.com/watch?v=kxbL2g4E7KU If you have any more questions we're all right here. ?
  3. Yeah, the house keeping employees at a local mall are doing exactly that, since 10/2015.
  4. Lscott

    From Canada

    In Canada you're limited to 2 watts max. You also don't have repeater frequency access either. Your GMRS service is basically like the FRS service in the US. Also Industry Canada wimped out and changed their mind about doing a MURS VHF service so you don't have that option either. One thing that people have done is use higher power VHF radios on the so called Radio Controlled Roads that are found out on the west side of Canada. Likely not really legal. Canada GMRS-FRS Rules.pdf Canada Annex E - GMRS and FRS.pdf Canada VHF LADD Channel List .pdf
  5. You could try switching over to use MURS radios. Those are also license free. https://en.wikipedia.org/wiki/Multi-Use_Radio_Service Also fortunately there are a few affordable ones out there so you don't have to mess around with looking for an old Part 90 radio that would be grandfathered in, received the operating grant before MURS was created. https://baofengtech.com/product/murs-v2/ https://www.buytwowayradios.com/business/murs-radios.html
  6. This topic has been beaten up plenty before in an older thread. https://forums.mygmrs.com/topic/3523-what-is-a-fixed-station/
  7. Thanks. That's why more expensive than I'm willing to pay even used for a hobby. If I needed one for personally owned professional use that would change the economics. None of my radios falls into the later category.
  8. About how much do you have invested in the radio and accessories so far if you don't mind my asking?
  9. Some radios do. My old FT847 sat radio has an "N" connector for the UHF port.
  10. Provided I didn't make any mistakes in the formulas, which is easy to do, you could try using a dummy load on one end with the other connected to the analyzer. That would at least allow you to check the results with a "perfect" load on one end. If there was no effect the match should be exactly 1:1. I guess the real point is these barrel connectors are likely OK for HF use. Once you get up to the 2M band is where the trouble starts. Like I mention in the worksheet better quality equipment you will see the center pin on the SO-239 socket is supported by a spoke wheel type of insulator, mostly air. It's done in an attempt to get the connector's impedance back to the ideal 50 ohms. The worse connectors are those using the dark Bakelite material. The white insulator looks like Teflon, but in most cases I think it's something else called Delrin which is similar depending on who you ask. https://forums.radioreference.com/threads/which-is-the-better-dielectric-teflon-or-delrin.28905/
  11. I did a quick search. The links I found are below. The one link shows the last experimental license, WK2XIK, applied for was in 5/9/2021 with a status of pending. It didn't show up in the FCC's database when I just checked. Maybe they were assigned a different call sign. https://fcc.report/ELS/Northern-California-GMRS-Users-Group-NCGUG/0960-EX-ST-2016/178767.pdf https://fcc.report/ELS/Northern-California-GMRS-Users-Group-NCGUG https://fcc.report/company/Northern-California-GMRS-Users-Group-NCGUG
  12. I don't really use the forums there. I'm primarily interested in what is in their frequency database. That's the main reason why the sight exists. Also many people who start off with a GMRS license end up getting their Ham license. Wouldn't it be fair to call them SAD GMRS users? Perhaps you would be better off to refrain from applying labels to people.
  13. I did a theoretical analysis some years back just to see what a short one would do. UHF Connectors Rev-3.pdf RFU-537.pdf
  14. I thought I read it wasn't. I guess I'll have to look it up on the FCC database. I had the info on the computer here for a while. I may have deleted it.
  15. Then it's a verified rules violation. Question is will the FCC do anything about it? It's one thing to run digital voice simplex between mobile stations, makes tracking them down hard. It's far easier when the station is in a fixed location like a repeater.
  16. Saving All my Dollars. Seeing it’s geared towards scanner users I fail to see how that applies.
  17. The radios can be manipulated by a satellite signal. Doesn’t have to be WiFi. A signal of sufficient strength can be transmitted to do the job. I remember AO-40 when it was in low earth orbit the 2M engineering beacon was coming in at S9 on my FT-847 at the time. That Ham sat had some powerful transmitters on board. https://www.eham.net/article/1543 The kill/stun feature can be disabled by the programed. However if there is another back door that is not accessible through the radio programming software then there is a problem. Since the manufacturers don’t publish the firmware source we have no way to figure out what’s in it. In fact most, if not all, manufacturers encrypt their firmware updates to prevent it from being reversed engineered. Concerns about back door op codes on modern CPU’s are around. Most current CPU’s are hot patched during boot up by the BIOS before the OS is started to load. The BIOS has a very special bock with new CPU microcode the processor reads into its writable control store. The CPU detects the special code block and loads it using it own internal loader. This can alter how some instructions on the CPU work. This is why flashing a new mother board BIOS is recommended at times to fix certain CPU bugs. If this code is corrupted by malicious people no antivirus, virtual machine fencing etc. can stop it. You’re just plainly screwed.
  18. Bad idea. Those bulkhead connectors are not a constant 50 ohm impedance. Those can cause a nasty SWR problem at UHF.
  19. Well in a way I don’t agree in the general sense. A lot of people own various Chinese manufactured digital radios. I have a D878 and a D578. Who can guarantee there isn’t some secret back door code to disable the radios or bypass the built in encryption feature? There is a major Chinese telecommunications company whose’s equipment is not approved for use over similar considerations. For that matter we can’t even be sure our own government hasn’t done the same. There are stories out there where computer equipment was intercepted before leaving the country where some of the chips were swapped out for specially tweaked ones that allowed our intelligence services to monitor them.
  20. How did you verify it was using NXDN? If I had to guess I would suspect it was either DMR or P25. Not too many people use NXDN although there are pockets of activity on the Ham bands with one major area being in west central Florida. If that’s really the case it’s an obvious rule violation. There are NO official digital voice modes authorized for GMRS. I think even the single “experimental” DMR repeater with a special FCC license is no longer in operation out that way either.
  21. Only if you see one floating overhead on a balloon. If your worried about it wait until it’s over a lake then shoot it down.
  22. Or keep buying those lotto tickets. If you wait 20 years the APX model you want today might be a bit more affordable when you find it on eBay.
  23. For $20 you can't go wrong. ?
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