We previously reported how the Liberty Bell sounded in 1915, with the sound transmitted by telephone.  But to mark the start of the nation’s sesquicentennial year in 1926, it sounded again on January 1, 1926.  This time, the sound was transmitted by radio over station WIP.  This announcement appeared 100 years ago in the December 30, 1925, issue of the South Bend (IN) News-Times, and recounted how the wife of the Philadelphia Mayor, Mrs. W. Freeland Kendrick, was to have the honors of sounding the bell.

She actually tapped out 1-9-2-6 in Morse code, as detailed at this site.

The December 1940 issue of Radio and Television Magazine showed how to put together this three-tube set for the broadcast band. A 6J7 served as regenerative detector, with a 6J5 audio amplifier. The 6C5 was pressed into service as rectifier, with a line-cord resistor dropping the filament voltage.

You’ll get some idea of the size by the fact that the front panel is made out of a standard household outlet cover. With a short antenna strung around a picture frame or on the floor behind furniture, the set would pull in local stations. Strong local stations might be strong enough to run a speaker.

One hundred years ago this month, the December 1925 issue of QST carried this circuit for “an inexpensive low power transmitter from receiving parts.” The author, Rufus P. Turner, 3LF, noted that many broadcast listeners, when they became interested in transmission, were put off by the high cost of transmitting apparatus. But he noted that this needn’t be an issue, since this low power CW and ‘phone transmitter could be built from receiving parts, including a C-301A or UV-201A tube, wired as a Hartley oscillator.

He noted that while some may view such a transmitter as a “worthless toy,” it was actually an effective low-power device. He reported that he had used it for three months, and worked many locals (in Washington, DC) on ‘phone, as well as many 2’s (New York) on CW, during daylight hours.

When the station was built, the next step was to obtain a license, which required submitting the proper form to the local Supervisor of Radio. Once that was out of the way, you were to call a local ham in your area and ask him to listen. “Hold down your key and speak into the microphone, using his station call and ‘signing’ your own.” When he heard you, you adjusted the coil and condenser until your signal was on about 170 meters (1.76 MHz).

The editor noted that phone operation was permitted only on 170-180 meters, whereas CW could be used on all other amateur bands. He noted that the circuit could easily be used on 80 meters. The editor also noted that he was “absolutely opposed to the use of the microphone in amateur transmission,” since “‘phone stations create enormously more interference than telegraphic stations. However, it is all right when using only a receiving tube and a 90-volt battery.”

The name of the author, Rufus Turner, should sound familiar, as we previously featured him.  He is believed to be the first African-American licensed radio amateur. He had no formal education in electronics, but nonetheless became a Professional Engineer in two states and was involved in the development of the 1N34 diode. He finally went to college in the 1950s, but earned degrees in English and became a Professor of English.

Eighty years ago, the construction details for this three-tube ultra midget receiver were found in the December 1945 issue of Practical Wireless.

The set was designed for size, and while it promised “reasonable reception” of the BBC Light and Home programs, the magazine made clear that “no exaggerated claims are made as to what may be expected.” The set, complete with batteries, measured only 5-3/4 x 4-3/8 x 2-3/4 inches, “so it can truly be claimed midget.” It was under two pounds, so “no one needs to grumble about carrying the set.” One space saving innovation was building a switch into the lid so that it opened whenever the lid was open.

The set had an internal frame aerial, but performance could be enhanced by tossing out few feet of wire.

Eighty-five years ago this month, the December 1940 issue of Radio Craft showed the newest idea to come to its attention, namely, this shoeshine boy who installed a radio inside his shoe-blacking case.  He could thus entertain both himself and his customer with some radio entertainment.

No technical details are given, although they should be pretty self-explanatory.  Just about any circuit powered by batteries and with a loudspeaker would be suitable

Shown here, all decked out for the holidays, on the cover of Radio News, December 1955, is the well equipped station of W9DW, who was undoubtedly a serious ‘phone man. The magazine contains technical details, courtesy of the Hallicrafters Company, of the commercially available single sideband (SSB) equipment which would soon change the ham bands.

The transmitter is a model HT-30, with 18 tubes (plus two rectifiers and one regulator). It starts out modulating a 50 kHz signal, which passes through three mixers to generate the desired frequencies. The receiver, while not identified in the article, appears to be an SX-100.

If you were a small broadcast station 80 years ago, you might be interested in knowing that you could purchase a Western Electric 451A-1 transmitter for immediate delivery. This ad appeared in the December 15, 1945, issue of Broadcasting. In addition to the broadcast band, it covered up as far as 2750 kHz, and ran from a single-phase 200-240 volt power supply, 50 or 60 Hz.

You can find the full specs and operating instructions at this link.