Friend just bought an airplane with a 28 volt system. Will a standard off the self adapter run on 28 volts or is there a special one? Google has me confused.
A lot of automotive USB adapters will create a lot of noise in your radios. They aren’t well shielded and the switching circuits create a lot of RF.
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Friend just bought an airplane with a 28 volt system. Will a standard off the self adapter run on 28 volts or is there a special one? Google has me confused.
Thanks
Rich
FWIW, I installed two of these dual port adapters in each of my planes, one of which is 28V. No PMA, but works well and doesn't create any noise or interference. $20 from Aircraft Spruce.
It's not just switching power supplies that can interfere with COMs. All clock oscillators of tablets and cell phones also radiate at discrete frequencies.
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Well if you’re going to spend the big buucks….
Transmitted from my FlightPhone on fingers… [emoji849]
FWIW, I installed two of these dual port adapters in each of my planes, one of which is 28V. No PMA, but works well and doesn't create any noise or interference. $20 from Aircraft Spruce. <https://www.aircraftspruce.com/catalog/pspages/usb-adapter.php?clickkey=27926>
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Thanks! I will power mine from the main bus to ensure no power draw when the battery master is off.
I just saw that Sporty's has a cigar lighter plug in unit with both old and new USB receptacles, works with 12v and 24V. inexpensive, displays system voltage.
https://www.sportys.com/flight-gear-usb-12-24v-slimline-charger.html
Speaking of charging phones, a hardwired usb adapter that's not on the master
(on a separate circuit like an electric clock) would be handy.
For when you're camped out (or whatever) & need to charge your phone (or whatever).
I know a guy who alligator-clips a USB adapter to his battery for this purpose,
but that's not a very elegant solution.
....I also bought a 2-port cigar-lighter usb adapter...
The voltage display is a nice feature.
Clued me in once to a popped generator breaker.
It's been in place for months, but I don't think I've ever actually used it for it's intended purpose
(charging my phone if required).
Think I'll try it out today to see if it generates any radio static etc.....
Start by checking or changing the cable. There are some really crummy ones out there. Note that USB cables that support higher charge currents have internal digital circuitry to negotiate charging rate, including most USB-C and USB-Apple cables.So I installed this USB charger under the panel like I have done many times before and this one makes a lot of noise when the owner's iPhone is plugged in. This airplane has a master relay on the firewall so I wired off the switched side of it and grounded to the firewall at the base of the relay. It is close to the Becker radio. Ideas" Bad charger, to close to the radio? https://www.aircraftspruce.com/catalog/pspages/usb-adapter.php
So I installed this USB charger under the panel like I have done many times before and this one makes a lot of noise when the owner's iPhone is plugged in. This airplane has a master relay on the firewall so I wired off the switched side of it and grounded to the firewall at the base of the relay. It is close to the Becker radio. Ideas" Bad charger, to close to the radio? https://www.aircraftspruce.com/catalog/pspages/usb-adapter.php