Description
The 18650 batteries used in the Tecsun H-501x are easily recharged in the Fugasun two slot charger with digital display. (These 18650's are not classed as FAT batteries).
The station being monitored is an FM station with no noticeable electrical interference.
However, if I switch the Tecsun to the AM band, annoying electrical interference can be heard.
FM (Frequency Modulation) was invented by American Radio Engineer Howard Armstrong
Click here to listen to the Tecsun on the AM band https://www.youtube.com/watch?v=ukVanc7gKj0