Deaf Radio Shack DX-390
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While visiting my in-laws I worked on a Radio Shack DX-390. My father in law bought it off of eBay to do some shortwave listening and found that the HF receiver was deaf. The DX-390 is known for getting a deaf receiver on HF due to a static on the antenna damaging the Q1 front end FET. Originally there was a 2SK152 as Q1. The DX-390 has little to no antenna static discharge protection and killed the 2SK152. It was not picking up anything. I often go too deep and try hard solutions too early so I wanted to try to see what the sensitivity was before replacing the part. I brought my antenna analyzer with me as I was planning on making some kind of wire antenna to play with the Yaesu FT-817 I also brought. My father in law is also an Amateur radio operator. The nice thing about the antenna analyzer is it can also work as a signal generator for some high level testing. I set the antenna analyzer to near 7MHz and just let it run with some wire hooked up to the center pin of the connector. M