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Lscott

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  1. Like
    Lscott got a reaction from WRXB215 in Repeater Off-Sets are different with HAM.   
    Every once in a while you may stumble across an "odd split" repeater frequency, rare but they are out there.
    If you end up getting some commercial grade radios the programming is a bit different. For those they don't assume any kind of offset. You have to enter in BOTH the discrete transmit and receive frequencies.  None of mine have any entries for an "assumed" offset, unlike many Ham grade radios.
    https://wiki.radioreference.com/index.php/Offset
  2. Like
    Lscott got a reaction from WRYZ926 in Thinking about getting into DMR.   
    Understandable.
    The goal was finding a spot where those that want to use digital voice have a "home", and not impact those who are happy with analog FM. 
    The proposed changes allows those who want to continue to use FM won't notice a difference.
    The manufactures would have a choice which grade of radio they want to provide. For example right now in the EU one can buy cheap simple analog only PMR446 radios, or spend more money and buy one with digital functions too.
    There isn't any reason to force manufacturers to sell only the more expensive combo analog/digital models. The market place will take care of that if the demand is there.
  3. Like
    Lscott reacted to WSAA635 in Repeater Off-Sets are different with HAM.   
    I went outside with my longer 771 antennas on 3 of my radios(AR-5RM, BF-F8HP Pro, and UV-K61) and the 3" antenna on my UV-5R and the longer antennas hit about 5 or 6 of the programmed repeaters, the UV-5R hit about 3 which I think is still pretty good for being in the 'burbs and miles away from the White Tanks. 
    I can't wait to give 6M a try with the RT-880. If I could get 15 or 20 miles Simplex I'd be happy since 6M should skip a bit and not have to totally be Line of Sight like VHF/UHF is.  I'm so glad I got my HAM Tech. License. This opens up a lot more Frequencies to play with vs GMRS/MURS. 👍
  4. Confused
    Lscott reacted to SteveShannon in Repeater Off-Sets are different with HAM.   
    You’re right.  1.25 meter is 1.600 MHz.  It can get really confusing.  Here’s a link to a chart that makes it even more confusing:
    https://wiki.radioreference.com/index.php/Offset
  5. Like
    Lscott got a reaction from SteveShannon in Repeater Off-Sets are different with HAM.   
    Every once in a while you may stumble across an "odd split" repeater frequency, rare but they are out there.
    If you end up getting some commercial grade radios the programming is a bit different. For those they don't assume any kind of offset. You have to enter in BOTH the discrete transmit and receive frequencies.  None of mine have any entries for an "assumed" offset, unlike many Ham grade radios.
    https://wiki.radioreference.com/index.php/Offset
  6. Like
    Lscott reacted to SteveShannon in Repeater Off-Sets are different with HAM.   
    It’s frequency based. For VHF such as 2 meters it’s actually 0.600 MHz offset and it can be either plus or minus. 
    For UHF such as GMRS or 70 cm it’s 5.00 MHz and for the ham frequencies it can be plus or minus, but for GMRS the FCC put the repeater input frequencies in the regs. 
    The frequency that’s given is always the frequency that the repeater transmits and your radio receives. For the frequency your radio transmits you apply the offset. 
    You uplink (transmit) to the repeater and you downlink (receive) from the repeater. You really will pick it up. You’re doing great. It’s just that the fire hose is so big right now. 
    Edited to add: most of the better ham radios automatically select the correct offset value based on frequency, but sometimes you have to override the direction. 
  7. Like
    Lscott reacted to WSAA635 in Repeater Off-Sets are different with HAM.   
    I noticed while programing some Repeater Channels into my radios that in 2M it's +/- 6MHz, 1.25M is -1.6MHz(didn't see any +1.6MHz on the list) and 70cm(kind of like GMRS) is +5MHz.  So RX(transmit to the Repeater) is the frequency that's given then you off-set that by the given MHz for your TX frequency. Do I have that right? Of all the radio stuff Repeaters has to be the one thing that I have trouble with in regards to TX an RX.  TX will ALWAYS be the one with the off-set, + or - whatever it is and RX is the listed Frequency.  I think I've got my head wrapped around it. 
    Also, just to add, "Uplink" is the Freq. I TX(send) to the Repeater and "Downlink" is the Freq or RX the Repeater sends back to me. If they'd just say RX or TX instead of Uplink and Downlink it'd be a lot simpler for me to understand but I think I've got it. 
  8. Like
    Lscott got a reaction from SteveShannon in Thinking about getting into DMR.   
    Understandable.
    The goal was finding a spot where those that want to use digital voice have a "home", and not impact those who are happy with analog FM. 
    The proposed changes allows those who want to continue to use FM won't notice a difference.
    The manufactures would have a choice which grade of radio they want to provide. For example right now in the EU one can buy cheap simple analog only PMR446 radios, or spend more money and buy one with digital functions too.
    There isn't any reason to force manufacturers to sell only the more expensive combo analog/digital models. The market place will take care of that if the demand is there.
  9. Like
    Lscott got a reaction from UncleYoda in Thinking about getting into DMR.   
    Yes I did. Yeah, it's not the best written paper I've ever done. Just tried to get my ideas down in some coherent fashion. I'm not an English major. It's easier to just attach it to a post rather than try to convey my ideas a few lines at a time over dozens of separate posts.
    No. The only reason for any kind of registration on Ham is for the user ID's. That's to prevent duplication. However you can use whatever ID you want, but for those that depend on the radio's builtin database it will, of course, show the wrong info.
    I had accidentally did that programming one of my DMR based NX-1300's. When I used it one of the Hams on the repeater noticed and asked about it. Didn't impede the QSO any however.  
  10. Like
    Lscott reacted to SteveShannon in A funny thing happened at my ham test today...   
    While it’s still fresh in your mind start going through the General material. It builds on the technician test and adds more technical detail. I really enjoyed the studying experience. Upgrading your license doesn’t require additional money to the FCC. 
  11. Like
    Lscott reacted to WSEZ864 in A funny thing happened at my ham test today...   
    Agreed. There is a LOT of overlap in material between the General exam and the Technician exam and General is relatively easy if you've just wrapped up Tech. I'm a VE (we actually have a monthly exam session tonight) and I very often see the same Tech candidate pass then come in the following month for their General and pass that too.
  12. Thanks
    Lscott got a reaction from SteveShannon in Thinking about getting into DMR.   
    Yes I did. Yeah, it's not the best written paper I've ever done. Just tried to get my ideas down in some coherent fashion. I'm not an English major. It's easier to just attach it to a post rather than try to convey my ideas a few lines at a time over dozens of separate posts.
    No. The only reason for any kind of registration on Ham is for the user ID's. That's to prevent duplication. However you can use whatever ID you want, but for those that depend on the radio's builtin database it will, of course, show the wrong info.
    I had accidentally did that programming one of my DMR based NX-1300's. When I used it one of the Hams on the repeater noticed and asked about it. Didn't impede the QSO any however.  
  13. Like
    Lscott got a reaction from WRTC928 in Skip On GMRS   
    https://en.wikipedia.org/wiki/Tropospheric_propagation
  14. Like
    Lscott got a reaction from SteveShannon in What are some good frequencies to program.   
    Using anything other than FM on VHF/UHF is sort of a specialty, including digital voice.
    Most of your digital voice operations you'll typically find on UHF, normally the 70cm band. There is some on the 33cm band but it's done almost exclusively with new/used commercial radios. There is some activity on VHF. 
    Other modes, like SSB can be found on VHF and UHF by a small number of stations. Where it really explodes is on the 6M band during an opening. The SSB section of the band goes from nearly DEAD to wall-to-wall signals at that time. You also might find the occasional AM station on 6M too.  
    The 1.25M band is a bit spotty. It can see significant use in some areas and almost nothing in others. There aren't too many radios with 1.25M TX/RX. Before investing in expensive equipment for that band do some monitoring and see what the local activity level is like. If 2M and 70cm is crowded in your area then the 1.25M band might be attractive if you prefer talking to a group of friends and don't want to hunt around for an open frequency/repeater to use all the time. Some also claim 1.25M has the propagation characteristics of 2M and 70cm making it a good choice when indoors or outside. 
  15. Thanks
    Lscott got a reaction from SteveShannon in Thinking about getting into DMR.   
    The FCC just recently made it officially legal on 11M. I guess it's popularity all depends on equipment availability and any real world advantage it might have over AM/SSB. 
    Some people have no interest in digital on GMRS. That's OK. However there are apparently enough who do that a few threads have commented about the proliferation of digital voice signals in some areas, and it's not even legal! Oh well.
    The point of digital voice is the ability to have reasonably clear communications out to nearly the limit of the traditional FM UHF signal range. FM can get really ratty and noise polluted at extended ranges.  
    One other reason to use it the digital signals, using the right mode, can fit between the main FM repeater channels with the likely hood of not interfering at higher power levels, unlike the narrow band FM currently allowed at 0.5 watts. In areas with substantial GMRS usage this opens up the service for much better coverage without begging the FCC for more spectrum we're very unlikely to get.
     
    GMRS Digital Voice - 20250723.pdf
  16. Like
    Lscott got a reaction from SteveShannon in A funny thing happened at my ham test today...   
    I have a buddy at work here that keeps saying he wants to get his Ham license but claims he doesn't have time to study. This has been going on for several years now. I don't bother to ask him anymore. If he wanted his license that bad he would have put in the effort. As you discovered it doesn't take that much.
    Congratulations on getting your Tech Class license. 😀 Now you get to spend even more money and buy more radios. 🤑
  17. Like
    Lscott got a reaction from GreggInFL in Thinking about getting into DMR.   
    Not yet anyway. That could change at some point. People are doing it now regardless of the rules. If the practice continues, expands and no FCC enforcement action then we could see the FCC just throw in the towel again, like they did in 2017 rule changes with FRS/GMRS combo radio, and make it legal. Then the question will be what mode(s), power and where.
    Some have pushed the idea to add more channels to GMRS. Very likely won't happen. As it is the service has 7 nearly useless interstitial channels, 8 to 14, limited to narrow band, 0.5 watts and handheld units only with fixed antennas. Finding a better use for those, at higher power and use on mobile radios, would be equivalent to adding 7 additional channels, no extra spectrum required.
    I posted an opinion paper, based on a suggestion made in an old thread on this forum, these nearly useless channels could be the location for a dedicated home for a digital voice mode. Some won't like the idea of digital voice on GMRS, but hey for example, the FCC finally got around to adding FM to 11M CB radio. Took them long enough.
  18. Thanks
    Lscott reacted to WSAA635 in A funny thing happened at my ham test today...   
    I was surprised at how easy the Technician Test was after only 3 days of studying on HamStudy.org. That really is an awesome resource for anyone wanting to get their Amateur license.  I ended up with a 34 out of 35 and it makes me wonder why I didn't do this sooner. 
  19. Haha
    Lscott reacted to WRUE951 in Baofeng DM32 encryption   
    do you know how many scanner folks that would love to crack encryption......   
  20. Like
    Lscott got a reaction from SteveShannon in Thinking about getting into DMR.   
    Not yet anyway. That could change at some point. People are doing it now regardless of the rules. If the practice continues, expands and no FCC enforcement action then we could see the FCC just throw in the towel again, like they did in 2017 rule changes with FRS/GMRS combo radio, and make it legal. Then the question will be what mode(s), power and where.
    Some have pushed the idea to add more channels to GMRS. Very likely won't happen. As it is the service has 7 nearly useless interstitial channels, 8 to 14, limited to narrow band, 0.5 watts and handheld units only with fixed antennas. Finding a better use for those, at higher power and use on mobile radios, would be equivalent to adding 7 additional channels, no extra spectrum required.
    I posted an opinion paper, based on a suggestion made in an old thread on this forum, these nearly useless channels could be the location for a dedicated home for a digital voice mode. Some won't like the idea of digital voice on GMRS, but hey for example, the FCC finally got around to adding FM to 11M CB radio. Took them long enough.
  21. Like
    Lscott reacted to WSAA635 in Thinking about getting into DMR.   
    Ok, I've got Zoom set up and I've taken the Practice Test a couple more times, Scored 32/35 and 34/35. I think I'm ready.🫤
    Just need to set up a time to take the test remotely. 
  22. Like
    Lscott reacted to WRUE951 in Thinking about getting into DMR.   
    you should be able to master the Tech in a very short time...  I would start looking into get your test scheduled..  Some areas are booking aout as far as 45 days..  You got this..   Get her done 
  23. Haha
    Lscott got a reaction from WRXB215 in Won a Baoefeng DM32UV radio   
    At least the battery is included. 🤣
  24. Like
    Lscott got a reaction from AdmiralCochrane in Mini Oscilloscope   
    You can buy really nice used scopes at Ham swaps for good prices. I've seen plenty of dual channel 100MHz Techtronic scopes for sale for $100 to $200.  
    In fact good used test gear is one of the things I always look out for. For a hobbyist it a great way to build up a test bench for a few $100's to a $1000 depending on what you want. You can easily end up with gear that would have cost several $10K's if purchased new at the time.
    At a minimum I would recommend a couple of variable DC power supplies (0 to 30 VDC at 1 to 2 amps), function generator (good to 5MHz), dual channel scope (50 MHz to 100 MHz) and a good bench top 4.5 digit multi-meter.  
    After that you can look for more specialized gear like RF power meters, frequency counters, LCR meters, electronic loads, service monitors etc. depending on one's area of interest. 
    Most of my more specialized stuff is stored away unless I'm using it. I have a dual channel HP frequency counter I have to do some work on (replace a noisy fan and install the optional 4GHz prescaler.) GPS disciplined 10MHz frequency standard, a used Rubidium atomic frequency standard, 200 MHz quad channel scope, 6.5 digit bench multi-meter, 20 MHz dual channel arbitrary digital waveform generator, 200 watt electronic load ... 
     


  25. Like
    Lscott got a reaction from SteveShannon in Transmitting Power Limits   
    The attached papers give a bit more info on RF power exposure limits. This can get rather technical.
     
    Limits for Maximum Permissible Exposure (MPE).pdf CNIRP GUIDELINES FOR LIMITING EXPOSURE TO ELECTROMAGNETIC FIELDS (100 KHZ TO 300 GHZ).pdf
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