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BoxCar

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Everything posted by BoxCar

  1. BoxCar
    According to the communications attorney I talked to, there are NO GMRS Base Station radios. There are GMRS radios operating from fixed locations operating as either repeaters or control stations. Your home based GMRS radio is used to control a repeater or communicate directly to other mobile units. This holds true through all sections under Parts 90, 95, and 97.
  2. BoxCar
    Which is not a problem as there are no "base station" radios. There are hand held and mobile units only. Some mobile units are used in a fixed location, but they are still mobile units.
  3. BoxCar
    I'd stay away from setting up a repeater until you get some experience under your belt and a lot more knowledge.
  4. BoxCar
    The letters designate if the code is normal or inverted. I haven't dug into DCS tones enough to understand the differences.
  5. BoxCar
    @AdmiralCochrane Many of their 12V supplies are adjustable to 13+ volts. Most of mine go to 13.6.
  6. BoxCar
    Personally, I use Mean Well (AKA Meanwell) power supplies I buy off Amazon. The Mean Wells are rated for medical use which translates to no measurable RF noise and constant output. Many public safety agencies also use the Mean Well supplies in their repeater sites.
  7. BoxCar
    Twp things, are you certain the battery is charged and do you have another battery you can use for a test? Otherwise, my recommendation is to go to a radio shop selling Motorola radios and ask them to check it out. You may have to pay a diagnostic fee but they will diagnose the problem.
  8. BoxCar
    With the PTT button not pressed it should show a frequency of 462.XXXXX. With the PTT pressed, it should show a 467XXXXX frequency. Wait, that's a 5 MHz offset isn't it?
  9. BoxCar
    The Tech license in amateur radio is limited almost exclusively to VHF/UHF frequencies however, there are so many different modes available you really don't mind the restriction. I'm Extra class but operate primarily in the Tech bands because its so much fun.
  10. BoxCar
    You also need to ensure you are on a repeater channel and not a simplex one.
  11. BoxCar
    The only method is to monitor the repeater's input or output. Optionally, you can connect a recorder.
  12. BoxCar
    Ahh, let the spending begin! The best hand held/mobile radio are the ones that meet your needs - and no, you don't need a repeater!
  13. BoxCar
    And be certain they aren't too tight as it chokes the functioning.
  14. BoxCar
    Between the ears
  15. BoxCar
    No, the signal being sent is only 20 KHz wide 125 KHz away.
  16. BoxCar
    Look at cell towers. The antennas on each tier (candelabra) are in an equilateral triangle 120 degrees apart. The antenna elements are highly directional with excellent F/B ratios. For your plan, I'd look into building Moxon antennas. The physical size is quite small with about a 12 dBb gain and 30 dB front to back.
  17. BoxCar
    As it's a DIY, perhaps you keyed in th receive frequency yourself. It's easy to make that error as some channels end in 25 while others are 50.
  18. BoxCar
    The BF-888s have been around for years. I picked up a pair about 6 years ago and gave them away. My thoughts, stay away.
  19. BoxCar
    May want to look at these as well https://www.amazon.com/dp/B088GQMX45/ref=sspa_dk_detail_5?pd_rd_i=B088GQMX45&pd_rd_w=r4YEl&content-id=amzn1.sym.8c2f9165-8e93-42a1-8313-73d3809141a2&pf_rd_p=8c2f9165-8e93-42a1-8313-73d3809141a2&pf_rd_r=3C3KC236XPPDDN7V1KMN&pd_rd_wg=Qc0NA&pd_rd_r=b398c3c2-7b4b-4606-a036-c1f7ada2134b&s=car&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWw&th=1
  20. BoxCar
    Sounds like a failing capacitor or Zener diode.
  21. BoxCar
    This won't be decided here if those frequencies are available above Line A or east of Line C. Kenny, why didn't you verify your point with the FCC before posting your interpretation of the rules?
  22. BoxCar
    But at least the conversation is semi-intelligent.
  23. BoxCar
    i believe you are dismissing the Shannon Effect in stating you need solid copper core coax. The Shannon Effect (not our Steve's notes) states the higher the frequency, the electrons move closer to the surface of the conductor. That's one reason some coax has steel or aluminum cores and just a copper shell. The key figure to check in the cable's specs is the velocity of propagation along with the cable's loss.
  24. BoxCar
    You'll want this: https://www.amazon.com/dp/B0842B1WFS/ref=sspa_dk_detail_3?psc=1&pd_rd_i=B0842B1WFS&pd_rd_w=x2cE1&content-id=amzn1.sym.386c274b-4bfe-4421-9052-a1a56db557ab&pf_rd_p=386c274b-4bfe-4421-9052-a1a56db557ab&pf_rd_r=9YZT9E1TH5RETEYTT830&pd_rd_wg=YGa5N&pd_rd_r=342e6db3-d9e7-4982-9774-5635fddbabc5&s=aht&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM
  25. BoxCar
    They are fine with the exception of the coax. I recommend https://thewireman.com/product/cq-rg8-low-loss-4xl-lmr400-equivalent/ for coax ($1.80 per foot). If you order from the Wireman, you will need 2 PL-259 connectors and 2 installations. The connectors are either $3 or $6 each and there is a $5 install charge for each. The Wireman also charges for shipping so that's an added cost. I use coax from this vendor for my own site.
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