Mike Wolstein said...
In re my old buddy Ron Henselman's great story about the Knight Kit Broadcaster:
I did the same exact thing, in 1968, when I was 19; but on FM! During my high school days, when I was 15, I built that same little blue "Knight Broadcaster". I tried a long wire but still got only 100 to 150 feet of range.
In 1968 I found a schematic for a tube-type FM transmitter in Radio-TV Experimenter magazine (I loved White's Radio Log!). I built it, and the fidelity was amazing! So much better than AM. It had a pretty good range, maybe 100 yds., but that wasn't quite good enough for this seasoned pro broadcaster. ;-). I connected the output, via RG-8, to my CB antenna on the roof of our building. I found that a CB antenna is great for FM! I had no idea how far my signal was going, so I made a 2-hour reel-to-reel tape of myself doing a radio show, complete with "commercials", rock and roll (lots of Fab Four!)and some locally-oriented announcements. Very professional! I took my little GE transistor radio and went walking around the neighborhood.
I finally started getting noisy about 1/4 mile away. I saw some friends of mine sitting on a porch and gave them a show. They were totally blown away. They couldn't figure out how I was doing that; they didn't know about tape. I did a daily show after school for a little while, but not many of the kids were paying attention. That ended my radio broadcast career.
73 Mike (Chicago area)