Re: Noisy Pi4 - particularly on 2m

Mark Griffith

They are definitely all not equal.  I have one now running a 4B with no under voltage alerts for months.

There are lots of little, cheap, USB voltage and current monitors that are available.  Plug your module into it and then from the monitor to the Pi and you can see the voltage and current draw.  I use it to check 5V supplies, and some will show 5.2 or 5.24 volts, and some show 5.0, or 4.98.  You take what you get.  The 5.2 volt outputs work great for all the Raspberry Pi models.

Search on eBay for "Multifunction USB Tester"


On Wednesday, June 3, 2020, 2:45:46 PM CDT, Tadd KA2DEW in NC via <tadd@...> wrote:

Alas they do not do what the Raspberry PI 4B calls for. 
So far I’ve not had one go wrong for 5v needs. 

On Jun 3, 2020, at 3:22 PM, Siegfried Jackstien <siegfried.jackstien@...> wrote:

i had good results for anything that needs 5v with these black power modules

they can be found with open end wires or with usb connector (different versions)

greetz sigi dg9bfc

Am 03.06.2020 um 19:08 schrieb Hank Riley via

Could you please provide a link or two just to give us a clue about what you're talking about specifically ?  There are so many devices on Ebay it would be really helpful to narrow it down.


On Jun 3, 2020, at 2:26 PM, Mark Griffith wrote:

There are lots of these modules around, some are better than others.  I have used some that output 5.15 volts consistently, and some just 5.0 volts.  Some have two micro USB connectors, some do not.  I have a few of these I use now that are very reliable.  eBay is a good place to find them.

I guess for $13 you get some and see what happens.  

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