LiFePo4 battery tested

[OE6FEG]

The one I have is perfectly quiet on RX, but it seems there is more to it than that:

DIY Powerbank with 18650 cells - anyone tried these ?

Hi all, I join this topic late and did not read all the posts above, but…there is one caveat with using any DC-DC converters to supply a transmitter, and all powerbanks use some DC-DC conversion: All DC-DC converters create some ripple in the frequency range of the switching frequency plus its harmonics. The fundamental is typically anywhere between 300 KHz and 2.5 MHz (the datasheet will tell you). The order of magnitude of the ripple depends on the PCB design and the input and (mostly) outpu…

       73 Matt