Hello everyone, I want to share with you the experience I had in 3 months of using a 30W PA for HF bought on ali. I decided to buy it because on 40 m my trusdx does not give me more than 3w and with my compromise antenna it was hard to be heard. So the goal was to drive the PA with 0.5 W output from trusdx powered at 5 volts, because I want to stay within the QRP range. I attach the wiring diagram, which seen by other expert om, has been declared a good design. In practice by acting on the input trimmer I reduced the output power to 5 watts with the benefit of reducing the absorbed current, about 2A. I had to make two low pass filters for 40 and 20 m. In my opinion for the cost it is worth the purchase.
