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BoxCar

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Everything posted by BoxCar

  1. Back in the 70's I tackled my power noise on my CB using a pi filter. It's an axial feed capacitor with bleed resistors on the input and output leads of the capacitor. Fixed all the power issues,
  2. And LMR400 has 1dB of loss for the same length.
  3. This method of testing coverage is only as accurate as the receiver used, along with the height of the receiving unit's antenna. Drive tests are often used to test cellular coverage, as their ability to get into the "nooks and crannies" directly translates into revenue for the site. They are also used by public safety agencies to test their coverage areas for the same reasons, using the same equipment from the repeater supplier.
  4. Well, a 6dBm gain antenna won't affect the area you could cover as the radiation pattern wouldn't be that much different from a unity gain omnidirectional. It would flood the area with 4 times the power fed into the antenna, though. You may want to consider the MFJ-1917 Telescopic pole for your antenna mast, it reaches a tad over 40 feet high but collapses down to less than 5 feet.
  5. The coax used for mag mounts is very lossy in lengths over 25 feet. You are better off using a half-wave antenna with LMR 400 or equivalent cable.
  6. A VNA is a better choice as it not only measures SWR, it can also measure cable losses, tell you if the antenna needs lengthening or shortening to tune it to a frequency and display the SWR across the entire band.
  7. I read it as he was trying to reactivate his old expired call sign and needed to file a motion for renewal.
  8. An Internet connection to the repeater will be necessary to network the repeater, but those are typically part of a "small" repeater.
  9. Wait till a business day and call the FCC for help. They do really help people wade through their messes.
  10. Sounds like a perfect match for this group!
  11. Ditto
  12. What radio are you using, and do you have the repeater in a repeater memory slot? You transmit to the repeater on 467 and receive from the repeater on 462.
  13. TQSL sets both the transmit and receive tone to the transmit frequency. TONE sets just the transmit CTSS frequency.
  14. One other thing, be certain you have the repeater programming in the correct slot in your radios.
  15. There is software available that will model the coverage you would get from your repeater installation. The software can show areas with no reception and those with, depending on the repeater's antenna type and height above ground level (AGL). The software I used for coordinating Part 90 frequencies was rented for over $100 per month but was considered one of the most accurate. I suggest you contact a local ham club to see if they have access to a package that can model your proposed installation.
  16. The dish can be reworked as a slot antenna giving you a directional vertically polarized antenna. There is a book on Amazon you can get that provides the details on building the slot antenna.
  17. You need to check with Industry Canada (their FCC) for the regulations regarding use of your radios while in Canada. Amateurs are allowed to operate within the Canadian frequency allocations but many other users cannot.
  18. @Sshannon Actually, you need to cite the entirety of Title 47 as the question was regarding type not placement or installation. There are no rules regarding when a Yagi antenna may be used while there are rules for the installation covering all antennas regardless of type.
  19. Channels 23 to 30 can be modified to work with repeaters using the standard frequency shift.
  20. There are no rules regarding antenna type.
  21. Try a Lido mount instead. lidoradio.com
  22. The regs state you must not knowingly cause interference but must accept all interference. That implies someone using a repeater isn't necessarily responsible for interfering with a simplex user. The other is true as well: the simplex user isn't necessarily responsible for interfering with a repeater. This assumes the other wasn't aware of the current state of the channels.
  23. Repeaters use two frequencies. The higher one is your transmit and the repeaters receive frequency while the repeater broadcasts on the lower which is your receive. Depending on the simplex frequency it could cause interference.
  24. Look into an attic installation for your antenna. Depending on the available space you can get a decent base antenna inside. No need for more than basic protection of the antenna and feedline.
  25. Connecting the two different services would violate the regs.
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