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Thanks for replying Bob. The antenna is a beautiful Rami antenna. I am sure
my friend does NOT want to cut it. He might experiment with additional
ground plane wires, but otherwise leave it as ...

One would think that the Kitfox steel tube fuselage frame would make a
good ground plane, but it does not. With the antenna mounted to a flat
plate that is welded to the top of the fuselage, the S ...

Going with one of Bob's proven wiring diagrams is a good decision.
Try ExpressPCB software for drawing wiring diagrams.
https://www.expresspcb.com/expresspcb-classic-pcb-layout-software/#wow-modal-i ...

Whether the victim is the battery or the generator, the object is to reduce the
current. A diode will do that. If a regular diode limits the current too much,
perhaps a Schottky will work. It w ...

Why not follow the battery manufacturer's recommendations?
https://earthxbatteries.com/dual-bus-lithium-battery-design
Based on extensive testing, the maximum charge rating will never be
exceeded u ...

Those 2 amp fuses are not a problem. If you want to experiment, you could short out
an indicator light to make sure that the fuel pump fuse does not blow along with the 2 amp fuse.

Some builders use all circuit breakers. It is a matter of personal choice.
I prefer fuses. They are lighter weight, cost a lot less, and never fail to open the
circuit when required. Some breaker ...

There is more than one way to wire the alternators. You can use the
3 position OFF-Battery-Both switch or separate switches.
Since you might eventually add a second alternator, to make it less conf ...

All you have to do is put a diode between the alternator and battery. That will
drop the voltage that the battery sees and limit the current.
An EarthX battery has very low internal resistance. W ...

I would NOT buy an external alternator now, but wait until you determine that
it is actually needed. I added up your loads and the total came to 13 amps. I
did not include intermittent loads: la ...

The integrated alternator should be adequate without an external alternator.
Have you done a load analysis? How many amps will your system require?
What is the exact model of your engine, 912ULS o ...

My friend abandoned the antenna embedded in the vertical stabilizer on his
Kitfox. He purchased a new antenna and mounted it atop the fuselage just aft
of the cargo area. The antenna base is mou ...

An alternator rated output is a nominal value, not an exact value. As the load
is increased, the alternator will increase its output to supply the demand. If
the load demands more than the altern ...

1. The purpose of the fuselink is to protect the wire between the main power
bus and the circuit breaker. If that wire is very short and installed with good
workmanship and the chances of shortin ...

As long as that battery box is securely bolted down so that it will not
break loose in a crash, then there is nothing to worry about.

The length of the cord is most likely the problem. A longer cord has
more capacitance which allows a few more milliamps to leak to ground.

A battery does not necessarily need protecting with a fuse. But the pilot
should have the means to shut off all sources of electrical power at the source.

When connectors are taken apart, there should not be exposed hot contacts
that could short out. So I connect hot power wires to the female half of connectors.

I took my SWR meter to the airport today and checked my friend's com antenna. The SWR was 3.8
Now he knows that his antenna installation will not work very well.
He is considering mounting a new an ...

I have made homemade antennas in the past and wished that I could measure
the resonate frequency. Does the NANO VNA H4 do that? If that is the only
feature that I want, is there a less expensive ...