Nearly five years ago , I wrote about one of them, the tale of how radio broadcasters were able to shoehorn an additional FM station into the radio because of the proximity of TV’s channel 6 to the rest of the radio feed.
I’m endlessly fascinated by stories of the quirks that were built into the TV system where the well-laid plans of the system simply fell apart because it was asked to do too many things.
The year that the U.S. Federal Communications Commission opened up the television system to use UHF, or ultra high frequency signals. The practical effect of this addition of bandwidth was that the total number of potential TV stations increased dramatically, from 108 to 2,051, overnight. The first UHF applications were granted on July 11, 1952, according to The History of UHF Television , a site dedicated to the higher-frequency television offerings.
It’s a tale that centers around channel 37, which was a giant block of static in most parts of the world during the 20th century.
So when I was informed that there was another oddity kinda like this involving the TV lineups, I decided I had to take a dive in.
Nearly the entire length of the Mississippi River fits into that radius. If Danville was located just a little further to the east, the radius would also include Philadelphia and New York City. For all intents and purposes, a 600-mile radius from Eastern Illinois covers basically the entire East Coast except the state of Florida and the Northeast.
Jansky wasn’t an astronomer, but an engineer, and despite discovering a new field of astronomy, his position at Bell Labs did not allow him to pursue it further.
In 1931, a radio engineer and Bell Laboratories employee named Karl Jansky was trying to uncover the source of static that was interfering with radio waves … and found it had an extraterrestrial source , particularly at the center in the Milky Way galaxy.
The research that led to the creation of the radio telescope was, basically, an accident—but a fundamental one that taught us more about the universe than we might have learned with a mere optical telescope.
And that thing was a 400-foot-wide radio telescope, operating along the 610 MHz frequency. It was something of a monster of astronomy at the time, operating 12 to 16 hours per day, and researchers at the University of Illinois aimed to keep it that way.
But there was something located in Danville that was important enough to scientists that they didn’t want to share it with anyone else.
The area around the 610 MHz band has, over the years, gained a reputation as being important to scientific research because of its placement in the context of two other frequencies important to radio astronomy, 410 MHz and 1.4 GHz.
Well, we wanted to build this parabolic cylinder. I sent George Swenson on a tour of radio astronomy outfits in the world, Australia, England and so on, and he came back with the idea of the parabolic cylinder, a fixed transit instrument that sweeps out the sky simply by the earth rotating. And we decided for engineering reasons that we could only build a really big one if we had a frequency round about 600 megahertz. Otherwise, the perfection of the reflector, if we went to a shorter wavelength, was not something that you could [do] by the acre, at least not at that time, which was the late 1950s. And so we picked upon this 610 megahertz band as the observing frequency.
Speaking to the Royal Astronomical Society as part of an oral history in 1978, McVittie, who played a central role in the creation of the telescope, stated that the device was developed in the late 1950s with a goal of being cost effective:
But after World War II ended, others eventually did pursue radio astronomy, including George C. McVittie, a British cosmologist who built the astronomy department at the University of Illinois in the 1950s, and George Swenson, who helped to build the university’s radio telescope.
The number of stations that had been allocated to use channel 37 in the ...