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Posted by Dave Childs on April 18, 2023 at 23:10:15.
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This may be a no-brainer for everyone but it's sometimes hard to tell a good ground from a poor one; hopefully someone might benefit from my experience. When I moved to this location in west TN I ran my antenna through the attic & grounded the lightning arrestor & coax shielding to top of my (working) TV antenna tower. And I also grounded my radio, isolation transformer & Z-matcher to the bottom of this tower. (And I didn't ground the coax at both ends so that wasn't a factor here.) Since then, til last week I had been plagued win constant QRM below 1 Mhz. regardless of whether the TV was on or off (I could barely get WSM-650 Khz., 100 miles from here, even at night.) And I live in the country so there's no QRM from nearby neighbors. Last week I went up on the roof with a portable radio set on 540 Khz. with the TV & & related equipment turned off but plugged in & ready for use. I found a tremendous amount of QRM. Everywhere the ground leads went, even the chassis on my radio sounded like a beehive! To wrap this up quickly, I remedied this QRM problem by removing the ground leads from the top & bottom of the TV tower & ran them to a new 8 foot ground rod which I drove into the ground about 20 feet away from the TV tower & the improvement is spectacular! A metal well casing shou produce at least similar results. I hope this isn't too lengthy & also that this helps someone else.
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