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5

There are many ways to do this. My favorite and I would assume you have these items in your shack. Most inverters have an automatic low-voltage disconnect feature. It makes a beeping sound and stops putting out 110AC when the battery voltage drops below 11 volts or so. You have probably encountered this feature while using your inverter. You connect a load ...


4

The antenna is most like a Planar Inverted F Antenna, or PIFA. Wikipedia has a brief introduction to them. Here is my sketch of a classic example: The PIFA is a wider bandwidth version of the IFA, distinguished by a radiator parallel to the ground (the upright of the F), a shorting bar at one corner or edge (the top of the F) and the feed a short distance ...


4

There are a couple of options. If your phone supports WiFi calling and your provider allows it, I strongly recommend getting WiFi in the shack if you don’t have it already. If you don’t have it, and that’s because you’re remote, get a LTE<->WiFi router with SMA connectors and an appropriate antenna. If you can’t use this solution you can buy cell phone ...


3

The Hints and Hacks column on page 30 of the July 2020 edition of ARRL's On the Air magazine carries an item titled, "Mounting an Antenna to the Body of Your Car." The author explains the process: Use a specialized hole saw to make the opening in your car's body - carefully avoiding critical physical, electrical and hydraulic obstacles Rust-proof ...


2

Menu option for ssb filter (38?) should be "off", if no filter.


2

Is there a good way to find out [a battery's] real remaining capacity except draining it by a known current and measuring time? While I'm curious to this myself and would love to see other answers, my guess is that applying a known load and seeing how it responds is the most reliable way. In fact a "battery load tester" is a fairly common tool ...


2

The antenna has nothing to do with the modulation scheme. The selection of antenna affects frequency and polarization. It may be tricky or very difficult to receive and transmit on the same antenna at the same time. Even with two antennas that are adjacent, this may be an issue, although careful placement, orthogonal polarizations, and good filter circuits ...


1

Since the transmitted signal is affected this must be a caused by interference on the supply voltage. The generator is most probable source for this interference. Simple filter in power supply line: inductor plus capacitor will probably help. Edit/addition: The pulses or RF noise are present on the supply voltage. Two options: the RF noise is present at the ...


1

That is a nice radio. Your best ground is at the alternator, but most of the time that is not easily accessible. The next would be the Chassis and finally the Battery. Reason for this order is the Ground of the power source (alternator) is connected to the chassis (Typically the engine block) which is also connected to the battery -. You can toggle between ...


1

For two meters there is an option to have a capacitor on glass as feed-through. Just stick it on both sides of a non-metallized window screen and use a quarter lambda vertical with a small inductor to compensate the feed-through series capacitance. Coax screen must be connected to the car body with a short connection. No hole in your car, no rain water ...


1

Some (in fact quite a few) mobile antennas are effectively an "end-fed" design rather than a "ground-plane" design. One way to identify them is that they will generally have a noticeable transformer coil at the bottom (usually enclosed) to transform the impedance. If an antenna's description includes the words "ground-independent&...


1

Check out this video from AG6IF who built a 2m slot antenna out of an old parabolic dish. His application was for home mounting a stealthy antenna, but the interesting notion there is that the slot is curved. His video shows a chart from an analyzer as well. This indicates to me that it's worth trying your idea too. Hope this is helpful!


1

On a vehicle with a steel body and roof, the most feasible 2 meter slot antenna design is a pair of square flat plates with spacers to maintain the space between them. The slot ends up being the horizontal space between the plates. The top plate is connected to the center of the coax feed line, and the ground is the bottom plate to which is joined the ...


1

With respect to the fuse in the negative questions is straightforward. It protects nothing. Remove the fuse, and the radio still operates because it is using the coax shield for DC power. The fuse that protects both positive and negative wires is the positive fuse. It is a Grounded system where one circuit conductor is bonded to Ground like a frame of a ...


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