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  Topic: IS a COM ANTENNA GROUND PLANE NECESSARY
user9253

Replies: 4
Views: 106

PostForum: AeroElectric-List   Posted: Wed Aug 12, 2020 8:45 am   Subject: Re: IS a COM ANTENNA GROUND PLANE NECESSARY
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 ...
  Topic: IS a COM ANTENNA GROUND PLANE NECESSARY
user9253

Replies: 7
Views: 427

PostForum: AeroElectric-List   Posted: Wed Aug 12, 2020 5:41 am   Subject: Re: IS a COM ANTENNA GROUND PLANE NECESSARY
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 ...
  Topic: Z-16 with a sprinkling of Z-12...help?
user9253

Replies: 1
Views: 39

PostForum: AeroElectric-List   Posted: Tue Aug 11, 2020 3:23 pm   Subject: Re: Z-16 with a sprinkling of Z-12...help?
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 ...
  Topic: Revmaster engine with EarthX battery
user9253

Replies: 34
Views: 292

PostForum: AeroElectric-List   Posted: Mon Aug 10, 2020 4:31 am   Subject: Re: Revmaster engine with EarthX battery
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 ...
  Topic: Revmaster engine with EarthX battery
user9253

Replies: 34
Views: 292

PostForum: AeroElectric-List   Posted: Sun Aug 09, 2020 10:14 am   Subject: Re: Revmaster engine with EarthX battery
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 ...
  Topic: two fuses in a circuit
user9253

Replies: 14
Views: 92

PostForum: AeroElectric-List   Posted: Fri Aug 07, 2020 9:24 am   Subject: Re: two fuses in a circuit
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.
  Topic: Rotax install
user9253

Replies: 27
Views: 337

PostForum: AeroElectric-List   Posted: Fri Aug 07, 2020 7:56 am   Subject: Re: Rotax install
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 ...
  Topic: Rotax install
user9253

Replies: 27
Views: 337

PostForum: AeroElectric-List   Posted: Fri Aug 07, 2020 5:34 am   Subject: Re: Rotax install
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 ...
  Topic: Revmaster engine with EarthX battery
user9253

Replies: 34
Views: 292

PostForum: AeroElectric-List   Posted: Thu Aug 06, 2020 6:30 pm   Subject: Re: Revmaster engine with EarthX battery
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 ...
  Topic: Rotax install
user9253

Replies: 27
Views: 337

PostForum: AeroElectric-List   Posted: Thu Aug 06, 2020 7:48 am   Subject: Re: Rotax install
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 ...
  Topic: Rotax install
user9253

Replies: 27
Views: 337

PostForum: AeroElectric-List   Posted: Wed Aug 05, 2020 11:06 am   Subject: Re: Rotax install
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 ...
  Topic: IS a COM ANTENNA GROUND PLANE NECESSARY
user9253

Replies: 7
Views: 427

PostForum: AeroElectric-List   Posted: Mon Aug 03, 2020 4:26 am   Subject: Re: IS a COM ANTENNA GROUND PLANE NECESSARY
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 ...
  Topic: Z11 field supply circuit protection
user9253

Replies: 7
Views: 264

PostForum: AeroElectric-List   Posted: Wed Jul 29, 2020 5:52 am   Subject: Re: Z11 field supply circuit protection
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 ...
  Topic: Z11 field supply circuit protection
user9253

Replies: 7
Views: 264

PostForum: AeroElectric-List   Posted: Mon Jul 27, 2020 5:47 pm   Subject: Re: Z11 field supply circuit protection
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 ...
  Topic: Battery Contactor Location
user9253

Replies: 1
Views: 362

PostForum: AeroElectric-List   Posted: Mon Jul 27, 2020 6:29 am   Subject: Re: Battery Contactor Location
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.
  Topic: Smoker GFCI question
user9253

Replies: 8
Views: 221

PostForum: AeroElectric-List   Posted: Mon Jul 27, 2020 6:22 am   Subject: Re: Smoker GFCI question
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.
  Topic: TypeS Lithium Jump starter
user9253

Replies: 3
Views: 223

PostForum: AeroElectric-List   Posted: Mon Jul 20, 2020 1:23 pm   Subject: Re: TypeS Lithium Jump starter
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.
  Topic: best practices for Molex?
user9253

Replies: 9
Views: 337

PostForum: AeroElectric-List   Posted: Mon Jul 20, 2020 9:12 am   Subject: Re: best practices for Molex?
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.
  Topic: IS a COM ANTENNA GROUND PLANE NECESSARY
user9253

Replies: 7
Views: 427

PostForum: AeroElectric-List   Posted: Fri Jul 17, 2020 4:54 pm   Subject: Re: IS a COM ANTENNA GROUND PLANE NECESSARY
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 ...
  Topic: antenna analyzer?
user9253

Replies: 21
Views: 747

PostForum: AeroElectric-List   Posted: Thu Jul 16, 2020 10:22 am   Subject: Re: antenna analyzer?
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 ...
 
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