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Everything posted by SteveC7010

  1. Good catch and a great fix! I suggest a light coating of dielectric silicone grease as well. The O-ring will slip into place easier and it’ll prevent corrosion. I put on the threads and center contact, too.
  2. Your PM400s can be setup with front panel selectable TPL or DPL (but not both) which will depend on what’s commonly in use in your area. I run a PM400 in my truck for GMRS and am totally happy with it. With any of these radios, adding an external loudspeaker greatly improves the receive audio to your ear. I keep several on hand, all Motorola, of course.
  3. Depending in your local codes, 35’ may be close to the max allowed. My village is 40’. Before spending any money on a taller tower, I’d use the 35’ one first and study the results. Get decent coax and connectors, too.
  4. Foil HVAC tape available at any hardware or home improvement store. Sticks like crazy, handles weather just fine, and electrically conductive. Like JohnE says, great for ground plane on fiberglass or other non-conductive surfaces. I used to patch a slightly over-size antenna mount hole on an aluminum roofed utility trailer. Still going strong many years later.
  5. And the batboard has plenty of info on a wide variety of Motorola gear.
  6. Exactly! When I travel from just west of Amsterdam to Rochester on I-90, I scan 1-7 and 15-22 CSQ. I might hear some flaggers briefly but even that is rare.
  7. Jim, Even with a decent quality connector, the mini-UHFs can be ornery. If it doesn’t want to stay snug, do this: Hand tighten the knob, being sure the little tabs are properly seated in their detents. You may have to hold it in place. Then GENTLY snug the knob with gas pliers just a bit, maybe a sixteenth to an eighth of a turn, no more.
  8. Chassis! Modern vehicles have sensors linked to the PCM or BCM on the battery ground side. Use a factory grounding point on the body/chassis. There should be one or more near the battery. They’re easy to spot.
  9. And, the ground side of the antenna’s coax is grounded to the radio itself.
  10. Ground plane needs to be 1/4 wave length in all directions. For GMRS, that is a 6” radius around the base of the antenna. You can have just east/west and north/south radials like a base antenna but for a vehicle it’s more practical to use a disc of metal. I won’t get into the resale argument over the drilling the hole since your mind is clearly made up. But I do wonder where you’re going to find double-sided tape that is both weatherproof and 70+ mph rated.
  11. Nope. Does not exist. Vanity calls are unique to amateur radio.
  12. How are you planning on fastening a mag mount to a fiberglass roof? Typically, for fiberglass roofs like RVs and some commercial vehicles and ambulances, etc. we use a thick surface NMO drilled through the roof with an appropriate ground plane mounted on the underside. I like the 3/8” NMOs for this. For UHF, a minimum of 12” diameter is good. You can use most any conductive material such as sheet aluminum, metal window screen material, and more. The ground plane needs a good electrical connection to the ground side of the antenna mount to be of any use.
  13. Grand Cherokees WJ ‘99-‘04 WK ‘05-‘10 WK2 ‘11-‘21 WL ‘22 and up We had a ZJ, a WJ and now we’re on our 2nd WK2, both with V8s and air suspension. The air let’s us jack the clearance up by 8” or so.
  14. Go to ebay and search on “magnetic mic” without the quotes. I just got 1,000 hits, not all them what you want, but lots of them are.
  15. Inside is fine. You could use metal window screen material, an asterisk of aluminum HVAC tape, chicken wire fencing, or any other electrically conductive material. Just make sure the ground side of the antenna mount makes good contact with the ground plane material. Probably have to use a “thick mount” NMO for a fiberglass roof. We do this all the time for ambulances, RVs, etc.
  16. https://forums.mygmrs.com/topic/2440-raptor-liner-roof-ground-plane/?fromsearch=1
  17. Go over to radiorefetence. There’s several recent threads on installs in aluminum bodied Fords. Tons of info and experience there for the reading.
  18. Please reference your source for this. The “association rule” in 95E applies only to grandfathered GMRS licenses issued in the name of the association. This can not be stretched or bent to apply to individual licenses that are now the norm.
  19. While I get your plan, it’s not permissible under FCC rules: 95E.1763c 467 MHz main channels. Only mobile, hand-held portable, control and fixed stations may transmit on these 8 channels. Mobile, hand-held portable and control stations may transmit on these channels only when communicating through a repeater station or making brief test transmissions in accordance with § 95.319©. The channel center frequencies are: 467.5500, 467.5750, 467.6000, 467.6250, 467.6500, 467.6750, 467.7000, and 467.7250 MHz.
  20. Let’s be clear, this just applies to mobile radios. It usually requires a programming change to enable or disable. This same “off hook” feature can also be used to disable scan when the mic is picked up. Again it’s just an easy programming change. With the exception of one public safety channel, I program Rx frequencies as CSQ which means I always monitor before transmitting. But then amateur and GMRS around here (Southern Adirondacks) is not heavily used anyway.
  21. Solar is great until it snows and then it’s not. My neighbor across the street has an extensive whole-house solar array on his roof. Right now it’s buried under a foot of snow and ice rendering it inoperable. It’s no one’s fault. It’s just a drawback. But folks who install solar educate themselves about this and have multiple power sources available at all times. I would suggest comprehensive research and planning be first and foremost when considering any robust system.
  22. I don’t believe there are any differences there. I didn’t see any when I first examined the radio. But it was a few years back.
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