I've been wondering about this ever since I saw this comedy TV show as a kid called Macken ("The car repair shop" in Swedish). Originally aired 1986 in Sweden, it features absurd situations and funny characters, but doesn't really use any "prop comedy", normally keeping the environments very realistic, which makes me ask this question.
In one episode, a local radio reporter enters the car repair shop wearing a huge metallic "backpack" with a large antenna and a microphone. It doesn't seem (to me) as if this is intended to be funny, and it seems "somewhat" reasonable to me that, even in the mid-1980s, such a thing would be required for a radio reporter to be able to "live-stream" the interview with the owner of the shop to the radio station's headquarters. Maybe it was old equipment even in 1986, supposed to indicate that the local radio station cannot afford the latest fancy gadgets?
Still, it does look rather goofy, and seems like something you'd associate with the 1950s or earlier rather than the 1980s. I cannot figure out if this was actually what radio reporters had to carry around as late as in the 1980s to "report live", or if it was seen as an obvious joke even when this was first aired.
It seems to me that, with 1980s technology, they would just need a small box with an antenna, which can be carried with one hand, but I'm obviously not an expert. And, again, maybe it was decades old inside the show's universe, supposed to highlight outdated equipment and the lack of funding.
The image shows two angles of this weird contraption from the episode.