Fun, but short range. A quarter wave CB antenna is about 2.7 meters long. Without that, you're making more heat than radio.
wspr is known to work at 7mhz band with just cloth hanger as antenna. i think its totally possible to use headphones as shitty longwave antenna too
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wspr is known to work at 7mhz band with just cloth hanger as antenna. i think its totally possible to use headphones as shitty longwave antenna too