When CB was "da thing" I spent all my free time fixing the damned things, and had no time to play on the air with them. On those rare occasions I did get on the air, it was either 40 or 80 cw. I wish I had a nickle for every reverse polarity diode across the 12 volt line that I replaced, every audio output device(s), and every RF out transistor and usually the driver, too. Those were the money making days. I was reasonable price wise, and would not let any rig leave that did not meet specifications or FCC requirements. I did lose a certain amount of business because of this, but still, I had more work than I could handle with a decent turn around time. I was able to buy all the state of the art test equipment of the day that I used to fix consumer electronic devices, commercial two way radio, and all the stuff i needed to fix/maintain commercial broadcast equipment.
One piece of test equipment that was specifically built to service and maintain CB equipment was the B&K Dynascan 1040 and 2040. All you needed to do was add a scope and you could generate, receive, or analyze any signal needed to troubleshoot or verify FCC compliance. I still have a set or two of those out in one of my trains. I always figured that they could be expanded and modified to be useful when working on ham gear. I'm sue Dave remembers those units. As time went by, I was forced to buy some Marconi and Areoflex station monitors plus some specialized stuff when I did some civil aircraft electronics on the side for a place in Phoenix. I really miss working on all that stuff down to component level. It was a challenge to track down the part(s) that were faulty, and I got a lot of satisfaction when I finally fixed that "dog" that was on the bench trying my patience and knowledge of how actual components worked together and made everything work. There wasn't time to be a parts changer and then try to charge the customer for parts that didn't fix the problem, and that were just left inside. These days it's either replace a board or the entire equipment. People with no actual electronic knowledge are fixing or 86ing the equipment that was once fixable.
Those were the days my friend......
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