Category Archives: Telephone history

Wiring Churches for Sound: 1941

1941OctRadioRetailingThere was a time, not so long ago, when an absolutely necessary skill for any kind of orator was the ability to project one’s voice. Entire books were written on the subject, such as this one that notes:

Bear in mind that as voice is dependent upon a copious supply of air, under the control of the will, so breathing is dependent upon pure blood, which, in turn owes its existence to proper and sufficent food and physical exercise.

Whenever you read a speech that predates electronic amplification, whether it is the Gettysburg Address or Teddy Roosevelt’s “Big Stick” speech, it is well to remember that if those in the crowd heard what the speaker was saying, it was only because they were able to hear the voice. This began to change in the 1930s and 1940s. For example, we previously reported, the legislative chambers of the Iowa State Capitol were first wired for sound in 1939. Before that date, the legislators had to project their voices so that they could be heard throughout the chamber.

And a member of the clergy had to have something besides a grasp of theology, Greek, and Hebrew. He had to have a strong enough voice. Eighty years ago this month, the October 1941 issue of Radio Retailing put it this way:

Many an earnest young divinity student was advised to leave the ministry because his voice was not considered strong enough.

But the magazine also noted that “today, this condition no longer applied,” and it presented an opportunity for the entrepreneur able to supply the requisite sound system.

The magazine carried the case study of Harbison Chapel at Grove City College, Pennsylvania, which was brought into the twentieth century by F.C. Millard’s Modern Sound Systems of Pittsburgh.

The Gothic chapel could seat 900 and was long, narrow, and tall. Millard was able to provide a satisfactory system at a cost of $632.80 (according to this inflation calculator, almost $12,000 in 2021 dollars), plus installation and wiring. The system consisted of two Western Electric 633A “saltsharker” microphones, one each at the pulpit and lectern, a 12-20 watt 124D amplifier, and a single horn speaker above the pulpit. A mixer was installed at the rear of the balcony.

The college’s president, Dr. Weir C. Ketler, noted that the system functioned so smoothly that the congregation could hear well yet be scarcely conscious that amplification was in use.



Stuckey’s Highway Emergency Locating Paging Service: 1973

Today, if you want to contact someone who is traveling, it’s a simple matter of dialing their cell phone number. Wherever they are in the country, or even the world, their phone will ring, and you will be speaking with them. You can text that same number, or e-mail them, and you can be reasonably certain that you will contact them. And you don’t need to know where they are.

This is a new phenomenon, and it hasn’t always been this way.  As recently as 30 years ago, if you wanted to contact someone, then you needed to know where they were.

Things began to change with the advent of cellular phones in the early 1990s, but only if the person had a cellular phone, which wasn’t always the case. And you had to know their phone number. For many users, the number was a closely guarded secret. They had to pay per minute for all calls–incoming and outgoing–so they didn’t give the number to just anyone. (Some countries solved this problem by having callers pay, but in the United States, almost without exception, the cellular subscriber had to pay for the airtime.)

But at first, even if you had the number, there was no way to call someone outside of their home area, without knowing where they were. In short, if you were on the road, you might be able to make outgoing calls, but you wouldn’t be able to receive incoming calls.

This 1990 news article made a prediction, which seemed almost unbelievable at the time:

Currently, callers seeking someone who has traveled away from his or her local calling area must know where that person is in order to complete a call. With automatic call delivery, a person “roaming” outside the home market will send out a locating signal to the closest cellular system whenever he or she turns on the cellular phone. Computers then will do the searching and service authorizations.

“If you’re up in Chicago and I’m back in Washington and all I’ve got is your local Washington number, I’m going to be able to dial that Washington number . . . and that phone call is going to find you . . . anywhere in the United States,” said Norman Black, a spokesman for the cellular phone association.

That was almost unbelievable, but according to the article, it was going to happen by 1992. It did eventually happen, but for most customers, it took a bit longer.

Prior to the 1990s, there was really no way to contact someone who was traveling, unless they called you. In emergency situations, broadcast stations might fill in. Occasionally, on stations such as WCCO Minneapolis, it wasn’t uncommon to hear a message such as the following:

The Minnesota Highway Patrol has asked our assistance in locating John Doe of Minneapolis for an emergency message. John Doe of Minneapolis, please call the Minnesota Highway Patrol for an emergency message.

When I heard those, I always wondered what kind of tragedy befell that particular family. But presumably, they heard their name on the radio, called the Highway Patrol, and were put in touch with whoever had the bad news for them.

In 1973, an idea came along that was ahead of its time–a method to contact travelers anywhere in the country. Messages could be sent to anyone anywhere in the country, as long as the traveler was willing to stop at a popular roadside retailer.  It was really an early version of e-mail, and certainly one of the first methods of digital communication that most Americans had ever seen.

The retailer was Stuckey’s, and the system they pioneered was called “Highway Emergency Locating Paging Service“, or HELPS for short. The chain had 350 stores nationwide, all strategically located along major highways. They had clean restrooms, they sold snacks, and most had gas pumps. It was the kind of place where you had to stop anyway, and the idea was that if you could also use their stores to keep in touch with family or business associates back home, then it would be a competitive advantage for them.

The store was equipped with a computer console with a CRT screen and 10 digit numeric keyboard. Before you left on your trip, you would tell the folks back home that they could always reach you by calling the Stuckey’s HELPS line in Georgia. From early in the morning to late at night, a friendly operator would answer the phone. After hours, there was answering machine. The caller would tell the operator that they had a message for you, and give the operator your home phone number (or other agreed-upon number). The message would be a phone number that you were to call back.

When you stopped for gas at any of the 350 Stuckey’s locations, you would go inside and use the free terminal. It would prompt you to enter your phone number. The terminal would link back to Stuckey’s headquarters via Western Union lines, and would display any messages, or tell you that you had none. If you had a message, then you would go to the payphone and call them.  You would have to pay for a long distance call, but you only had to pay for one long distance call.

The beauty of this system was that the caller didn’t need to know where you were. As long as you bought your gas at Stuckey’s, it didn’t matter if you were in Maine or California–you would get the message.

The system got the approval of the New York Times:

Stuckey’s deserves a large bouquet of pralines and a rousing round of applause from the motoring public for having invented a free, public service with no strings attached that is probably the greatest contribution to the motorist’s peace of mind since the free gas company roadmap and the hopefully clean gas station rest room.

The console had a second function. The store manager had a key that converted it into a terminal for ordering stock from the company’s warehouse. The annual cost of the system was estimated at $660,000.

As a youngster, I remember seeing one of these machines and thinking to myself what a good idea it was. Of course, I entered our home phone number, and there were no messages for us. As far as I know, it didn’t last long, and I never saw another one of the terminals. It was a very good idea, but perhaps a bit ahead of its time.



Santa Catalina Radiotelephone, 1921

1921MarRadioNews1A hundred years ago, if you were located 26 miles across the sea (40 kilometers, for those in leaky old boats) at Avalon, Santa Catalina Island, California, you could enjoy the luxury of telephone service with any telephone in the United States, thanks to the radiotelephone service operated by Pacific Telefone and Telegraph Co., as described in the March 1921 issue of Radio News.

The system consisted of stations KUVX at Avalon and KUXT at Long Beach. A complicating factor was the presence of naval station NZL, also located at Avalon. To avoid interference, the radiotelephone receiving station employed a wave trap to null out NZL’s frequency. The article gives the radiotelephone wavelength of 425 meters (706 kHz). The system was full duplex, meaning that there would be different transmitting and receiving frequencies. Since the 425 meter wavelength is discussed in conjunction with the wave trap on the receiving antenna, it appears that the Long Beach station transmitted on 425 meters, and Avalon transmitted on a different frequency.

The author described an interesting catch for an SWL as part of a test conducted by the Avalon station. He listened in on a conversation from Avalon to the mainland, which was carried by the transcontinental telephone lines to New York, where the call was carried by another radiotelephone station to a ship in the Atlantic. The author reported that the voice was a little distorted, but could be clearly heard throughout the ten minute test.

The Avalon station was powered by a motor generator, and to avoid having to restart the power, the carrier was left on 14 hours a day, with calls to and from local hotels, stores, and residents carried as needed. A licensed radio operator oversaw the transmitter, connected to an eight-wire antenna, and receiver, connected to a loop antenna. A telephone operator put through the calls, presumably with another operator at the Long Beach side of the circuit doing the same.

The system was able to transmit telegraph signals simultaneously with telephone conversations without interference. This was accomplished by “superimposing a high pitched harmonic on the carrier wave.”

A more detailed technical description of the system can be found in the December 1921 Proceedings of the IEEE.  You can also find additional references at Wikipedia, which notes that the system was replaced by a submarine cable in 1923, ending the possibility of radio listeners being able to tune in to telephone conversations.

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1960 Telephone Amplifier

1960DecPMSixty years ago this month, this stenographer dutifully takes down a verbatim transcript of her boss’s telephone conversation, thanks to a Lafayette telephone amplifier. The amp is connected to the phone through a telephone pickup coil, still readily available today. With it plugged into the amp, she can easily hear both sides of the conversation.

The unit was actually a kit. While it is not specified, we suspect that the secretary put it together herself, since it freed her of the need to use a headphone for such tasks, and probably made her work much easier.

The photo appeared in the December 1960 issue of Popular Mechanics, which highlighted a number of available kits, and pointed out how many, such as this one, could make things run more smoothly at the office.



Laying Telephone Wire by Airplane

1945SepPMIt looks like Bell Labs was working on this idea toward the end of the war, and it probably wasn’t implemented, at least on a very large scale. But this ad from the September 1945 issue of Popular Mechanics sounds like a good idea for quickly laying lines for military field telephones. Instead of having men do the work on the ground, possibly through enemy territory, an airplane does the job, at a rate of 16 miles in 6 – 2/3 minutes. One end, with a weight and parachute, is dropped to the ground. Then, wire is spooled out continuously.



1920’s Answer to the Zoom Worship Service

1920ElecExp1With most of the world locked down due to the threat of COVID-19, places of worship have been scrambling to deliver the Word of God to the faithful at home. But long before Zoom and YouTube were a thing, churches have relied upon technology to connect with members, as shown by this illustration from a hundred years ago this month, in the May 1920 issue of Electrical Experimenter.

Zion English Baptist Church, Penycae - geograph.org.uk - 729952.jpg

Zion English Baptist Church, Pen-y-cae, Wales, the likely origin of the 1920 transmissions.  Wikipedia photo.

Shown here is miner Sam Pritchard of Penycas, Ruabon, Wales. In 1919, he was injured by the fall of a rock. Undaunted, he was able to hear the service at the Baptist Church thanks to a telephone rigged by three of his friends.

A button microphone and batteries were strategically placed near the pulpit, with wires run to Mr. Pritchard’s bedside some distance away. A telephone receiver was strapped to his head, through which he was able to take part in the service. The magazine noted that the apparatus required was not expensive, and that such a setup could prove valuable in the northern or western United States where deep snows often cover the country.

Of course, over the years, churches have moved on to radio, then audio recordings, then television, and then the internet to deliver their message to those shut in at home. Incidentally, the OneTubeRadio Laboratories are currently hard at work preparing a 100 mW AM transmitter which will operate, with a 9 foot antenna, to broadcast church services within a parking lot. The internet works well for those who are at home, but everyone signal is slightly out of synch with everyone esle. At such time as it becomes possible to congregate a bit more closely, in parked cars, radio will allow everyone be able to listen simultaneously (or as simultaneously as the speed of light allows).  We have verified that the transmitter is up to the task, and today, we received the parts necessary to provide a high-fidelity audio feed.  We’ll post updates as the project is completed.



1920 Robbins Telephone

1920AprilBLA hundred years ago, the Scout or “any Real Boy” desiring to set up his own private telephone exchange couldn’t go wrong with these telephone sets from the Robbins Manufacturing Company, 1807 North Central Park Avenue, Chicago. For $2, the company would supply two transmitters, two receivers, and a hundred feet of wire. The sets would work over a much longer distance with ordinary bell wire.

For Real Boys desiring a deluxe setup, two wall phones (suitable for grown ups, too) and 300 feet of wire were available for only $6.

The ad ran a hundred years ago this month in the April 1920 issue of Boys’ Life.



1935 Light Beam Communicator

1935MarPM85 years ago this month, the March 1935 issue Popular Mechanics showed how to make this light communicator, said to have a range of about a half mile.

The receiver used a caesium photo cell, which the magazine said could be had for about $3. This was fed into a two-tube amplifier which could drive a speaker or headphone.

For audio amplification at the transmitter end, the system used the household radio receiver, and the magazine explained how to hook up the microphone. The the light beam generator used a system I’ve never seen before. Instead of electrically modulating the light bulb, a mechanical approach was used. The speaker was disconnected and the output was instead connected to a magnetic headphone that had been modified. The outer cap of the headphone was unscrewed and cut so that most of the metal diaphragm was visible. Then, the “diaphragm is slipped off and taken to any plating firm to be finished in the same manner as an audio headlight reflector.” The headphone was reassembled, and the result was a mirror that would vibrate in time with the sound. An auto headlamp was used to illuminate the mirror, and this was focused through a lens with a focal length of about 12 inches.

The result would have been a narrow beam of light that was modulated. At the receiving end, another lens was used to focus the beam on the photo cell.

For a unique science fair project, the advanced student could adapt this project using modern materials.  When I was a kid, I built a similar system using a flashlight as the transmitter.  The bulb was wired in series with the secondary of an audio transformer.  The primary was fed by the output of an amplifier.

For the receiver, I used a solar cell fed directly to the input of an audio amplifier.

1935MarPM2



1920 Telephone Set

1920JanBLA hundred years ago this month, the January 1920 issue of Boys’ Life magazine carried this ad for a real telephone for real boys. The set came with two transmitters, two receivers, and 150 feet of wire, all for $2. The ad noted that for longer distances, bell wire could be used. The set was available from dealers, or directly from the Robbins Manufacturing Company, 1807 N. Central Park Avenue, Chicago. It was billed as just the thing for scout work.



Avoiding Telephone Annoyance, 1920

1920Jan19EveningLedgerFor those who are annoyed by noise while talking on the phone, then this device from a century ago would prove helpful. As shown, the earpiece covers both ears, ensuring that your call won’t be interrupted.

The picture appeared in the Philadelphia Evening Public Ledger a hundred years ago today, January 19, 1920.