Something from long ago ¡ the first time I installed my shack at this QTH in about 1990, I put up a sky wave loop for 80M. Surprise, the 50kW AM BCB station a couple of miles down the road ¡ª on 1300 kHz ¡ª wiped me out on ALL HF bands. I calculated what their third harmonic was at my QTH and checked their legal limit. They were legal.
So I went with a vertical antenna instead, rather than put a high-pass BCB filter on the loop.
30 years later, we have improved receiver technology and I have a whole lot more test gear. I might try the loop again. With a BCB notch filter on 1300 this time.
73
Jim N6OTQ
Sent from my quenched-gap spark transmitter.
