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BoxCar

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Everything posted by BoxCar

  1. Another point to consider, antenna orientation. If your GF points her antenna to you, the signal will also drop because antennas radiate from the middle, not the end.
  2. BoxCar

    GMRS NOOB

    Mike, Your radio needs to transmit a tone to wake up the receiver on the repeater. In your configuration for that channel, set the transmit tone to the same value shown in the repeater's listing. You do not need a receive tone.
  3. My thought as well, it's overpriced for what's there. The one point in their favor appears to be the installation instructions. IMO you can probably do with a 20 to 25W radio on the trails and for most travel needs. the extra power from a 45W UHF radio buys you maybe an additional mile of coverage.
  4. The "custom" channels allow you to store various configurations of the authorized channels such as those using tones for '"privacy."
  5. One more question; how are you testing the radio?
  6. Here are plans for a GMRS J-Pole that is about 18" in total length built from a piece of 300 ohm TV twin lead. It can be put into a PVC stub and hidden on the roof as a new vent pipe. J-Pole Emergency Flexible Antenna (fiu.edu)
  7. Laird BB-4505cr Manufacturer TE Connectivity Info Ground Plane Required Frequency (MHz) 450 - 470 MHz Product Narrative TE Connectivity ongoing commitment to refinement in mechanical and electrical design has resulted in the release of their latest product, the mobile coil antenna with an elastomer spring. The new elastomer spring provides increased flexibility, better shape retention, and eliminates electronic noise & road noise compared to stainless steel springs. The mobile coil antennas will continue to maintain all of the features that make them unique, such as stainless steel whips, housings constructed with ABS material injection molded around a solid brass insert, and gold plated push pin contacts. Together, the mobile coil antenna and elastomer spring, make TE Connectivity the obvious choice for quality and long lasting value for demanding mobile radio communications. Gain (dBi) 5 db Maximum Power (Watts) 200 Whip Length (In.) 34" Whip Material Stainless steel Bandwidth 20 MHz Spring Incl. Yes Color Black Base w/ Black Whip Mount Type Order NMO Type Mount Separately
  8. Good question but for commercial/public safety grade repeaters the output level is at the antenna connection. These heavy duty units are also built to put out their rated power for hours at a time unlike the hobbyist grade units like the Retevis.
  9. If you are playing with parasitic radiators (metal reflectors) then the distance between the antenna and the reflector is key. The distance between the two determines if the reflected wave adds or subtracts from the primary.
  10. BoxCar

    Steve45

    I'm still waiting for them to ship my maggy mount for my aluminum car....
  11. But you don't know if it was BS or not even though the OP clarified there was a newspaper report. There is a 50/50 chance reports of an FCC investigation being in progress are true as, like your local PD, they don't make public reports of every investigation they undertake.
  12. No, it won't be in the database as no action was taken. An investigation is just that, someone looking into something. You may find emails talking about investigations, but those require a FOIA petition to access.
  13. The cost and frustration in attempting to use two handheld radios as a repeater is about 10 times the cost of the Retevis system.
  14. LATNEX RC-S120 Simplex Repeater Controller cheaper at Newegg.
  15. Antenna tuning is critical for transmitting as any piece of wire can receive a signal.
  16. That's probably a Chinglish problem. Those plugs are usually rated for 8 to 10 amps not watts.
  17. Need a bigger pie pan as that is your ground plane. A small cookie sheet or pizza pan would be better. Ace Hardware sells small sheets of steel and you need one about 12" or more per side.
  18. The 4503 offers the most gain. Liard antennas normally don't need tuning.
  19. Not if it is capable of operation outside its certification. Monitoring MURS is not a violation but enabling transmission is outside the certification for the radio. You have modified the radio so it is no longer compliant with its certified use. You are operating under Part 15 rules using a modified Part 95 radio.
  20. Adding MURS frequencies moved your radio from being a GMRS unit to an uncertified intentional radiator operating outside its designated purpose. You can't have your Part 95(e) and eat it too!
  21. Wireline refers to two locations connected by a physical, terrestrial connection. Telephone networks communicate between points using a physical hard-wired connection hence the term wireline. The term can also trace its beginnings back to the early days of telegraphy where physical wires connected each station to the other. The term predates radio and its modern equivalent wireless.
  22. The operative word is temporary as these types of poles will collapse or fold with any decent load caused by wind blowing against your antenna. If the antenna is going to be on your house, look at either roof mounted tripods or gable mounts as used on satellite dishes. These are more permanent mounts for antennas that are better than the J-Poles.
  23. Try Ace Hardware or a Marine supply store.
  24. About 1/3 the way down the page are adapters for SMA to PL/SO-259 connectors. Tower Electronics Online Wholesale Catalog - Page One (pl-259.com)
  25. Look into radial ground planes as a possible solution. You can also bury the ground wires using a slit trench.
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