[exray]

The Dealer/Service would setup the Station Setter for the local stations and some of the receivable "biggies" and beat the Setter's preset freqs against the tuned-in stations for setting the radio's pushbuttons dead on freq.

Actually its biggest usefulness was setting the pushbuttons when stations were NOT on the air. In those days the smaller stations weren't necessarily on the air all day. This was the case in my hometown when they went off from about 2-4 PM well into the 60s (when a second station finally came to town)

It also enabled the serviceman to set the buttons for some nighttime stations that could not be heard during the day.

I had an RCA version. It was ac or battery operated and used a 6H6 as a rectifier. I forget was the 'business' tube was.

-Bill