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Lscott

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Everything posted by Lscott

  1. Lscott
    That's the type of ID used for P25 digital voice mode. Not without a real P25 radio, or a hot spot with the P25 protocol built in. Note P25 radios are expensive. Some used radios people have them priced like Gold Bricks, and IMHO they are way over priced. You can buy really nice used DMR and NXDN radios far cheaper than the P25 stuff. For example this is a section of Kenwoods 2024 catalog. Look at the cost to add P25 conventional verses DMR conventional to one of their top tier NX5000 HT's. Note they come out of the box enabled already for NXDN. https://comms.kenwood.com/special/nx_5000/common/pdf/nx_5000_brochure_2016.pdf The price is shocking to say the least. Other manufactures will rape you just as bad. P25 radios are expensive, I'm guessing,for a couple of reasons. One it's a requirement for many emergency communications systems, and its used by just about every government agency. Second, and I don''t know if it's still true or not, but there were/are government grants to cover some of the cost of the equipment. Of course as soon as the government starts handing out money the prices go up because the manufactures figure the end buyer isn't footing the whole bill so the cost, to them out of pocket, isn't as big of a deal.
  2. Lscott
    That's sort of interesting. You have two different ID's that both show as working for DMR/P25. Not sure why the first one shows for DMR/P25/CCS7 since your DMR ID should work for that already unless they are maintaining two separate databases for DMR and CCS7.
  3. Lscott
    They can give you two but you must really must need the second one. They are getting very pis*y-as*ed about people getting multiple DMR ID's, and don't need them. DMR can only handle a max of about 16 million ID's. If they don't clamp down on people getting a bunch sooner or later those will run out. I don't see that happening any time soon but you do have to watch out. I believe you can use your DMR ID for P25 as the CCS7 ID. I haven't looked at this in a long while so I could be wrong on this part. While you're there you can also apply for an NXDN ID too. I have both so I'm covered for all three modes. DMR: 3122951 NXDN: 765
  4. Lscott
    You MUST ID as required by the rules. This is true for other digital voice modes. It’s also a common misconception that using a DMR ID is a substitute for your FCC issued call sign. It most definitely is not. For more info on CCS7 follow the link below: https://brandmeisternetwork.blogspot.com/2016/03/dmr-user-repeater-registration.html
  5. Lscott
    Many DMR repeaters are linked. That increases coverage from local up to potentially world wide. Also if you wanted to setup your own repeater some can be operated in “single frequency mode” which eliminates the necessity of using a duplexer. That can save you a lot of money while allowing the flexibility to change the frequency at will. You can find mobile radios with this built in. Very handy when you need a repeater setup in a remote area for a group activity.
  6. Lscott
    You can start by looking through the attached file. Amateur Radio Guide to DMR.pdf
  7. Lscott
    See attached files. Canada Annex E - GMRS and FRS.pdf Canada GMRS-FRS Rules.pdf
  8. Lscott
    Just a note on DMR encryption. This thread on another forum might be of interest. https://forums.radioreference.com/threads/official-standards-documents-for-dmr-encryption.399358/ I think the only encryption that fairly interoperable between manufacturers is ARC4 (RC4) 40 bit. Some DMR radios don’t offer AES or DES levels. I do have a few Motorola XPR650’s with RC4, https://forums.mygmrs.com/gallery/image/261-motorola-xpr6550jpeg/?context=new and I have it added to my Kenwood NX-1300’s. https://forums.mygmrs.com/gallery/image/290-nx-1300duk5/?context=new They go by different names but are the same thing. Motorola calls theirs "Enhanced Privacy" and Kenwood calls it " Enhanced Encryption" or "RC4". I believe Hytera radios use it as well. https://www.hytera.us/resources/what-is-two-way-radio-encryption/ Then the Anytone D878UV's have RC4, AES and their own spin that only works with their radios. This is an interesting topic and could use it's own thread.
  9. Lscott
    The attached file should help. Amateur Radio Guide to DMR.pdf
  10. Lscott
    Maybe we should start a thread about Hemorrhoids.
  11. Lscott
    One of the guys I talk to at the gym had his done I think at the beginning of July. I'm waiting to see if he starts back at the gym. I expected he would be out for at least 2 months for rehab. My knee rehab sucked until I got back to a regular gym work out. The exorcise bike and working on leg strength worked wonders. I think I made more progress in a few weeks than a few months at PT.
  12. Lscott
    Yeah, wait until your knee gives out and have it replaced. It makes the shoulder work look like a walk in the park.
  13. Lscott
    Been there about 12 to 15 years back. Had a minor rotor cuff tear in the tendon. Got surgery to stitch up the tear, doc put in an anchor to reattach the torn section to the bone and clean off some bone spurs. I wrecked the shoulder at the gym while using the upright seated bench press machine. Yeah, it hurt like an SOB when it happened too. Then the shoulder “popped” just a fraction of a second after I felt the stretching sensation. When home offer that. Basically couldn’t lift my right arm. It took about 6 months of PT just to get back normal range of motion. Then another 6 months to a year building the strength back up.
  14. Lscott
    NR770HA Roof Rack Mount Tests.jpg

    From the album: Misc. Radio Gear

    This is an SWR scan for a Diamond NR770HA dual band antenna with the UHF type mount. This particular one I picked up super cheap at a local Ham radio flea market. The testing was done on a roof rack type mount with 13.5 feet of RG-316 coax connected to another 10 feet of RG-8X mini coax. Your installation will likely measure a bit different. The results don't look that particularly good compared to the Comet CA-2x4SR and the Diamond NR-240CA antennas. In an emergency It will likely work OK. https://www.diamondantenna.net/nr770ha.html Looks like another possible one just usable for Ham, MURS and GMRS use.
  15. Lscott
    NR140C SWR Sweep

    From the album: Misc. Radio Gear

    I ran an SWR sweep for this antenna. It's a mono band gain antenna for the Ham 1.25M band. It's about the same size as the Comet CA-2x4SR people claim is resonate on the same band, it's not marketed by Comet for the band. I suspect due to the similar size and some of the design details might explain why this might be the case. There is no datasheet for the antenna so I had to make one of my own: The Diamond NR140 is a high-gain, monoband mobile antenna for the 1.25-meter (220 MHz) amateur radio band. The following specifications apply to the NR140BNMO model, which uses an NMO mounting base. Key specifications Frequency Range: 222–225 MHz Antenna Type: Mobile vertical antenna, monoband Gain: 3.8 dBi Power Rating: 100 watts Height: 36.200 inches (approx. 3 feet) Element Phasing: 1/2 + 3/8 wave Mounting Base: NMO (New Motorola Mount) Connection: NMO mobile mounting base not included; compatible with NMO mounts. Fold-Over Feature: Yes. The fold-over design is for manual use, and the antenna is not built to withstand impact from objects like tree limbs at speed. Magnet Mount Compatibility: Yes, though the magnet mount is sold separately. Design and features Construction: The antenna is described as strong and well-constructed, with good build quality reported by some users. Performance: The NR140 is a high-quality monoband antenna designed for optimal, no-compromise performance on a single band. It is more efficient than multi-band antennas in its specific frequency range. Appearance: The antenna has a natural, metal finish. Manufacturer: Diamond Antenna, a manufacturer with a reputation for producing durable products.
  16. Lscott
    I know the older model can. See attached files for more info on the radios. D878UV Maintenance Mode Password.pdf AT-D868_D878 Info and mods 20240607.pdf
  17. Lscott
    The relevant sections are: https://www.law.cornell.edu/cfr/text/47/95.971 https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-D/section-95.973 https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95/subpart-D/section-95.975 https://en.wikipedia.org/wiki/Carson_bandwidth_rule
  18. Lscott
    For $25 you won't get the performance you expect. There are other things you should look at such as RX sensitivity, de-sense, channel isolation, spectrum free from harmonics, spur response, frequency accuracy and stability etc. Most people don't have the equipment to do these kinds of tests. If you know somebody with a good quality commercial radio grade service monitor I would stick the radio on it and run some tests. Some decent used ones run around $1K plus used. I believe one of the members of this forum got a used one in this price range a while back specifically for testing his radios and repeaters. A few that can do auto tune up, radio calibration, and digital mode testing can run over $10K to $20K plus used. For example the cheap, $25, Baofeng UV-5R early version had dirty transmitters. They were multi-band radios. You could talk on several all at the same time! I'm not knocking your desire to do a video on the radio. But remember you give people the idea the radio is the best thing since sliced bread, people buy them because they're cheap, and now the local bands have issues with crappy signals on the air. UV-5R VHF Harmonics Test.pdf
  19. Lscott
    https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/official-publications/policies/spectrum-utilization-policies-sp/sp-462467-mhz-spectrum-utilization-policy-permit-licence-exempt-devices-land-mobile-frequency-sub
  20. Lscott
    If you can put it on a scope and frequency counter to verify that. Then the next test is output power. That I expect to suck. Trying to design a tuned power amp stage to have that kind of bandwidth is going to cost a lot more than $25. I know many people thought their D878’s could do 1.25M since they could program in the frequencies. However the real results at the antenna port just wasn’t there to make it worth the trouble.
  21. Lscott
    Opportunity for the manufactures to sell more radios with "New Features" for more money.
  22. Lscott
    Looked it up. Tops out at 520MHz. The RX around 300MHz might be useful. Military air communications use frequencies in that range. For $25 don’t expect good performance. I’m about 20 miles west of Selfridge Air National Guard Base here in Michigan. https://www.airforcetimes.com/news/your-air-force/2025/04/29/trump-announces-new-fighter-jet-mission-at-michigan-air-base/ For a few years my folks had a house on a canal going to Lake Saint Clare just a couple blocks south of the entrance to Metro Park. You could stand in their back yard and watch the military flights taking off and landing all day long. Would have been cool to monitor the radio traffic that’s not encrypted.
  23. Lscott
    Remember those people claim it's a communication hobby. Really?
  24. Lscott
    Read section C. These are the repeater main 467 channels. Fixed stations I believe are primarily for equipment control and not for normal communications. This would make sense since the 467 main channel frequencies are the repeater inputs, which can also receive control commands from a fixed station. 47 CFR § 95.1763 - GMRS channels. | Electronic Code of Federal Regulations (e-CFR) | US Law | LII / Legal Information Institute
  25. Lscott
    Can't tell that when on channel 6, The Super Bowl.
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