You need a HF radio so you can communicate with people in your city or outside your country. Its true you need a license but who cares if theres an armagedon BUY CAR BATTERIES so you can use it if theres no electricity.
And you should buy a handy, like a Yaesu FT50R (or Baofeng 5VR) and a CB too.
I have the same problem, I found the same open diode https://semiconductors.es/datasheet/AT02P-170.html but Im not sure if that is the problem, cant find a place to buy that diode.
How did you fix your power supply, was it the diode or something else?