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General Radio Discussion / Re: Vintage analogue/ tube receivers for BCL/SWL DXing?
« on: September 01, 2020, 1810 UTC »
Another idea for a make-shift GND? Do you have a bed with a pretty solid steel bed frame? It will act as a counter poise, but how much so is anyone's guess. And rejecting MW band better? You could roll your own Passive High Pass Filter, http://www.learningaboutelectronics.com/Articles/High-pass-filter-calculator.php#answer2 Try 820 Ohms for the resistor, and 100pF for the capacitor. The FREQ Cutoff on that site calculator is 1.942MHz, so anything above that should pass through, while anything below that should be attenuated. If anything, it's neat to try.