Was never a ham radio operator but hung out with kids who were (50's - early 60's). I was more into SWL. Fun to listen to Radio Moscow and Radio Havana to hear their side of the cold war story, and of course RFE to hear our own propaganda. Learned a bit of Portuguese listening to Radio Brasil. Designed and built radios and amps from cannibalized radios & TV's & war surplus. All vacuum tube of course, with the exception of a crystal set I built in 6th grade that incorporated antenna and demodulator impedance matching so it didn't drag down the Q of the tuning circuit and provided high sensitivity. Unlike almost all other crystal sets, it had good selectivity although not up to superhet standards. Despite the number of local (Sacramento) stations occupying the AM band, got KGO San Francisco on a regular basis, and one time I DX'd XERB Tijuana. Tried numerous times to snag clear channel KSL but never succeeded.
For a few years mid 80-s to mid 90's was very active in the Longwave Club of America. Ran the DJ Part 15 beacon in Los Banos, calculated radiated power 13 microwatts. Longest distance it was reported received was about 250 miles. It was regularly received in both San Jose and Fresno.
Designed and build my own 1750 meter band phasing type SSB receiver, fit in the palm of your hand --- except of course for the antenna! For portable work I had a series resonant whip on the car that worked as well as what other guys were reporting from their active whips. One guy got pissed when I referred to my antenna as a "fake active whip". Where circumstances and time permitted, the Ford Falcon and a ground rod provided the electric dipole and a huge ferrite rod tuned solenoid series resonated it. The same arrangement was used as a "portable" transmitting antenna.
Nowadays I play around with speakers and amps. Presently building a horn & 1 watt amp PA system powered by two AA cells, light enough to lift with your little finger and with high enough efficiency and sufficient directivity to serve as the only amplified sound source in an approx. 1,000 square feet (100 square meters) venue.