I remember the era of "scanners," which weren't scanners at all. Radio Shack made tunable receivers. When they were tuned, they received about half a megahertz so you always fought the terrible noise of several competing frequencies being received at the same time. You really could not tell exactly where you were tuning, so once you received what you wanted to hear you left it there. My first receiver from Radio Shack was a handheld that really performed quite badly. Their receivers were sold under the brand 'Patrolman." I bought it in 1968 along with my trusty Police Call. There were larger desktop receivers that tuned in a smaller spread. I could not afford one of those. A neighbor of mine had a friend that mounted 2-3 of these things under the dashboard of his vehicle with 1-2 of them mounted to racks on the center hump of his vehicle. He had small. very narrow, strips of tape on the display that made it a shorter effort to tune in various frequencies. While he had less of the "receiver wars" it still occurred.
Then in late 1970 I bought a Regency TMR-8 VHF High crystal scanner. It only had only 8 channels. There was so much I was missing with such a limited number of frequencies on just one band. I still have every crystal I ever bought and of course the radio with the flashing red lights. I don't remember where I bought it.
I remember that if I had a technical question I went to Henry Radio in west L.A. I think it was on Olympic Blvd. just west of the 405 freeway. They helped me a bit with a very cheap receiver that had some of the HF spectrum. They helped me design and build a dipole that went from one of our house's lot boundary back to the house. It must have been at least 60 feet long. I spent all kinds of time tuning in weak frequencies and eventually was able to receive "Radio Hanoi." This in 1968, with the war in Vietnam at its height. The thrill of DXing caught me right then and there. Henry Radio was fully staffed with expert "Ellmers" behind the counter.
I bought a few things at Radio Shack because there was on of them about 2 miles from home. But, even then, with little experience, I thought that most of their products were of "marginal quality," to be kind.