Had the same issue. Went to Anker USB cables. They use higher gauge power conductors than signal conductors in their cables. Available lots of places, including Amazon.
-larry (K8UT)
------ Original Message ------
Sent: 2021-07-12 17:13:38
Subject: [RaspberryPi-4-HamRadio] Quality USB-A to USB-C cable to avoid voltage drop
Hi all in the group!
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Been doing lots of Google searches, and while years ago I found this kind of info for the old micro-USB cables, I haven’t found similar information for USB-C – and I figure the Pi Ham Radio group is my best bet.
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I’ve got a Pi-4 8GB model, with an Argon One M.2 case and Samsung SSD as the boot device.? I’m building out this device for portable logging/digital mode usage when I’m on POTA activations – either by VNC from a tablet, or a small portable screen mounted in my radio case.
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So the problem I have is with voltage drop – I power the Pi via a PowerWerx USB-Buddy – which provides 5v DC @ 3A, connected to a Bioenno LiFePo4 battery.? In my testing here at home, using a 1ft long USB-A to USB-C cable, it works without any problems.? But, I wanted a longer cable, so I went to a 3ft cable from the same maker.? Once I used that cable, I was immediately getting low voltage warnings – so obviously I’m getting voltage drop on the longer cable.? But I’m having trouble finding heavier USB-A to USB-C cables to avoid voltage drop across that length.
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Anybody have knowledge of any good cables that fit the bill???
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Thanks!
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Jeremy, NQ0M
Larry K8UT