With an otherwise boring GE AM clock radio, I changed the tuning dial to show radio station callsigns (like I see often done with Australian radios). I chose to use callsigns in the area and time I grew up, New York City around 1970.
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Oh, and just like vacuum tube valve radios, I recapped it (replaced the electrolytic caps (they tend to dry out, losing capacitance)).

The Australian radio I have:
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That clock radio looks like it is in good nick for its age. I didn't realise your TV networks had radio networks by the same name so I've learned something there too.

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A valve a day keeps the transistor away...

Our TV networks were spawn by the older radio networks. There used to be essentially half hour equivalent of TV shows broadcast on radio stations (without pictures of course). Affiliates of one of the 3 networks would receive recordings of the show that they'd play at some scheduled time. These recordings are likely the source of OTR material you can buy on cassettes or mp3s or such today.

On my radio I left off the leading "W" of the callsigns (like Australia leaves off "VL" IIRC), as every station (a few exceptions exist) on our east coast up to the Mississippi River are all W stations, west of that are all K stations. Once our FCC made a mistake and issued a K callsign to a station on the east coast. If I owned that station I would have kept it, as I'd be the only station in town with a unusual callsign. Anyway, New York City had the network flagship stations WABC, WNBC and WCBS on radio, and they still do on their TV stations. As time went on, the radio stations became semi-detatched and eventually sold off (but WABC and WCBS got to keep their callsigns, as WABC-TV and WCBS-TV are distinct calls from WABC and WCBS).

QUOTE: Our TV networks were spawn by the older radio networks.

I think that is the way things are heading here now. For a long time we had cross-media ownership laws which stopped our media conglomerates from owning a newspaper, radio station and TV station in the same market. The same laws also limited the scope of foreign ownership.

I think it is all open slather now. Fairfax and News own just about every newspaper here. Southern Cross Network own several radio and television networks. Prime Television and WIN Television dominate the regional television markets and have pretty much the largest privately-owned transmission footprints in the world. Austereo, ARN and Super Radio Network dominate the rest of the radio market.

With all this consolidation it is getting hard to keep track of things like callsigns although they've always been allocated to the physical transmitter, with the broadcasting entity using that callsign as their ident. With most stations being part of a wider network now the callsigns are getting dropped from programming schedules, being replaced by a network name.

Some of these names seem okay whilst others are just bizarre. When I was a young lad I can recall that every broadcaster used a callsign.

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A valve a day keeps the transistor away...

There were some American radios marked with station callsigns, Packard Bell (sold mostly on our west coast) did this on most of their radios up to sometime in the 1950's.

An example: Image Link