A fellow Ham recently bought the QYT KT8900, a small cheap chinese radio. After few months he had no sound at all, not even menu beeps. dead.
I decided to…
After my PSU died and released its magic smoke, I got the XP Power JPS250PS12 which can produce 250W (21A @ 12V), and cranked the voltage up to 13.8V using the gray pot.
Even on 12V the…
Around a year ago, my chinese CAT cable stopped working.
I took my oscilloscope out of the box and tried to find where the problem is.
I came to conclusion that the USB to serial chip…