GMRS has been around since about 1948 and it has never caught on very much. I don't think any car mfr is going to embrace it now and include it in a factory car radio.
That will never happen. The amount of engineering, design, manufacturing and installation would be expensive plus technology will march on leaving whatever 2-way radio is built in your vehicle obsolete in 2yrs. Plus FCC rules occasionally change sometimes allowing radios to do more stuff...
If I don't get my afternoon Cappuccino I can turn into a mass murderer. I prefer taking my Honda EU2000i for things like that as I've measured some impressive 12V current draw on some big inverters and would rather not subject my battery to that much punishment.
My experience with automotive size batteries is they can hog a lot of current when first connected to a charger with unlimited current capability and they taper down pretty fast. If a battery draws 50 amps when first connected to a charger you can watch the ammeter slowly go down, maybe 40A...
The truck alternator should not be current limited up to its rated output, so if the battery is capable of drawing 100A charge current when discharged then that's what its going to do. There will of course be voltage drop in the wiring and the potential alternator current will drop off at low...
It depends on the battery state of charge. A large completely discharged battery, say 10.5 volts will draw a lot of current when presented with 14 volts or so for charging. Perhaps 50-100 amps for a brief time until the state of charge improves then the current will drop off proportionally. Its...
I had a Yaesu FTM-400XDR/Icom 706MKIIG setup in my truck and just swapped out the Yaesu for a Harris XG-100M multiband mobile with remote mount head. This radio covers 136-174, 380-520, 760-870MHz transmit and receive out of the box plus 30-50MHz receive. It will do VHF lo band transmit with an...
Several months back I was finding small droppings on top of my battery and would vacuum it out only to find more the next week. I set mouse traps and would find them tripped but no payoff. One day I started to open my hood and heard rustling inside so I fetched my .25 cal pellet gun.
I opened...
The ground plane or ground radials are not really the other half of the antenna and unlike a 1/2 wave dipole the ground radials do not radiate. Therefore a ground plane has less gain than a 1/2 wave dipole.
Antenna books of the 1950s and 60s would show a ground plane having a mirror image of...
A ground plane or ground radials are ideally 1/4 wavelength minimum which is about 6” at GMRS frequencies. For a round disc that would be 6” radius or 12” diameter. A 6” diameter disc would not be adequate for a GMRS ground plane.
The grease used externally is not permanent, it will eventually fail. I think any metal shop can duplicate that shape out of 1/8" thick stainless without too much trouble. You might have to live with a slightly larger bend radius but it won't affect anything.
That looks like a lot of antenna for that type of mount. Anyway, rust in this case is mostly cosmetic. I can't imagine the rust getting bad enough to cause a high resistance connection unless you ignored it for many years. If you had to scrape the paint to make electrical contact I would try to...
The fact you heard someone from 170mi away tells me it was a UHF ham repeater getting into your radio as many of them are linked together via the Internet over great distances and you heard ham callsigns. There are a handful of linked GMRS repeaters around but I would have to do some research to...
The overload problem and resulting ghost signals where they don't belong is common with radios like the Baofeng handhelds and other inexpensive radios. I don't have a Midland GMRS radio here to test but with my past experience with other Midland radios I suspect its a performance level issue in...
I've heard hams mistakenly using their amateur ID on GMRS but what you were heaing was probably a UHF amateur repeater nearby that was overloading your radio creating intermodulation distortion and ghost frequencies of the amateur repeater inside your radio that landed on a GMRS channel. All...
I have a bunch of pictures of my Mojave sprinkled around this forum and so far I have three NMO mounts, one on each side of the hood near the hinges that I can use for CB through 900MHz, an NMO on the upper front bed rail at the back window good for VHF through 900MHz and a "universal" mount on...
Yes on all the above and I also use a timer relay wired direct to the battery as there are enough things in these trucks to kill the battery prematurely. I also find the DC voltage is very clean and there is no spark plug noise at any frequency I can find. I've run considerable power on many...
Grounding shown by an ohmmeter doesn't really apply to the antennas being discussed and its more about the amount of flat sheet metal right under the antenna vs a wire to the body or battery. You can have a sufficient size ground plane approx 12" dia for UHF floating above the vehicle and not...