During the CB craze, some enthusiasts boosted their signals to vastly increase their range. With "skip" (bouncing off the ionosphere to bend around the earth's curvature) CB'ers could talk over vast distances, all the way around the world on a good day.
On not-so-good days their signal bled all over other bands. Dad claimed he could open his neighbor's garage door just by keying his mike. He claimed he could cause radio-controlled model planes to crash as well, if he wanted to.
This sounds similar - cheap or badly modified equipment spewing trash all over the airwaves...
Back in the 70’s We had an electric organ that would quit playing music from the keyboard and get a loud static sound, and the voices of truckers would start, “Breaker 19” and we could hear them broadcast, have absolutely no idea how it was overriding the organ, but eventually it would fade and the organ would start playing again. Hearing voices coming from that organ was creepy when I was a kid.
Had a neighbor a long while ago who had a very powerful CB radio attached to a large mast on the wall of his home. It was so powerful that I could clearly hear him on my TV, radio, my telephone, and probably my toaster. I didn’t really care except for the evening when I got home from work and wanted to watch some TV.
I went next door to ask him to ease off his radio in the evening and he was very cordial and agreed.
I got back in the house and turned on my set and he was telling the world that “my neighbor asked me to stop transmitting so he can watch TV - I guess I’ll talk all night long”.
You know, of course, this means war.
I built a high-pitched squealer on Channel 21 and every time he was on, I’d fire up the squealer.
He went nuts. He tried everything to find the source, but I’d shut it off when he came out of the house and tried to locate it.
3 things happened: a trucker came to his house and punched him for grossing his wife out with of his obscenities on air.
The FCC showed up and took his radio and made him take his mast down.
I got back to watching TV.
Yup, possibly faulty hardware. During the CB crazed seventies, I knew a family who boosted the signal strength on all their hw. The girl I was friendly with had a unit in her car that was extra-strong, and leaked signal.
She could transmit to the PA system of the local Marine Reserve base whenever sho drove by. Her voice could be heard from the street. It was a transport company, and she had a sexy voice, so the guys loved it.
The Marine boss found out who was talking to them, of course, and just told her to not disrupt things during drill-time.