We use this one and it works with no noise in our glider.

https://www.navboys.com/DOUBLEUSB.html

Terry Walsh







At 22:22 27 November 2019, wrote:
On Friday, November 15, 2019 at 12:30:28 PM UTC-5, Brian wrote:
On Friday, November 15, 2019 at 6:27:30 AM UTC-7, Emir Sherbi wrote:
I had a lot of noise issues with the USB ports. Some of them work,
othe=
rs not. The most practical was to carry a portable powerbank, but is
anothe=
r thing that you have to remember to charge....
=20
I have tried a few as well and also had issues with noise. So far been
us=
ing a powerbank as well. But if willing to try some recommendations for
low=
noise outlets.
=20
Brian

I use a cheap Autek brand 12V to 5V converter for powering the Nook, and
wi=
th some ferrite rings on the input and output wires there isn't any
signifi=
cant radio noise.

A "power bank" may create noise too. Each such has a 3.7V lithium
battery
=
coupled with a switching mode power circuit to convert it to 5V output.
Th=
at said, has anybody had noise issues with them in practice? Also in
turbu=
lent conditions simply putting the power bank in a side pocket may not be
s=
afe.