Author Archives: clem.law@usa.net

Two 1945 Crystal Sets

1945PMXtalSet1Seventy years ago this month, the June 1945 issue of Popular Mechanics carried the plans for the two crystal sets shown here. As the article points out, crystal sets can come in two varieties. The simplest set has little selectivity, and is suitable only for tuning in the one strongest station in a given area. For more variety, a more complex set with more selectivity is required. The magazine showed two sets, one in each category.

The simple set had its coil and all of the other parts mounted on a plastic drinking cup. The more selective set contained two variable condensers, both salvaged from old broadcast radios. Complete crystal detectors could be purchased for about 25 cents, or the builder could make one with a piece of galena. Thus, even with wartime parts shortages, most hobbyists would be able to scavenge together the needed parts.1945PMXtalSet2

For those wishing to replicate one of these designs today, I have ideas for finding parts on my crystal set parts page.

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First Broadcasts: Paris, 1891, Newark, 1911.

Most will be surprised to learn when the first broadcasts took place. In other words, people in their homes could, for the first time, listen to music, news, or entertainment originating from a central studio. The answer, it turns out, is Paris in 1891, when the Theatrophone first started broadcasting.

The Theatrophone didn’t use radio–it broadcast programs to subscribers’ homes by telephone line into a dedicated telephone instrument. Surprisingly, despite the later competition from radio, the Paris Theatrophone held on until 1932. Similar systems were soon in operation in Budapest and London.

In about 1911, a group of New Yorkers were traveling in Budapest and were surprised to find the service available in their hotel. Upon doing some investigation, they decided to offer a similar service. It was decided to install the new system in Newark, New Jersey, and later expand to New York. They formed the New Jersey Telephone Herald Company and began operations either in late 1911 or early 1912.

NJTelHeraldRxThe drawings of the home receiver instrument and main studio shown here are from the June 1925 issue of Radio News.  The article notes how similar the studios of the Telephone Herald were to those of a radio broadcast station of 1925. Broadcasting took place from 9:00 AM to 11:00 PM daily, and included, music, news, market reports, and even bedtime stories.

The company leased telephone lines from the New York Telephone Company in order to bring the service to individual city blocks. From that point, the Herald had its own lines to run the programs to individual subscriber homes. There were some mechanical amplifiers used in the distribution process, consisting of telephone receivers and transmitters connected by a rod. The main downfall of the system was the limitations in amplifying the telephone signal, which could never get above headphone volume. As the Radio News article pointed out, the system would have worked quite well had vacuum tube amplifiers been available. But they were a few years off, and radio had a firm hold on broadcasting by the time they were available.

The New Jersey Telephone Herald office and studios.

The New Jersey Telephone Herald office and studios.

Interestingly, the New York Telephone Company was initially unwilling to lease the lines, and the Telephone Herald had to go to the New Jersey Board of Public Utility Commissioners to force the telephone company to lease the lines. The Commision agreed with the Telephone Herald.  The Commission held that the Telephone Herald was not a “public utility,” but instead just another telephone customer, and they telephone utility was obligated to make the lines available on the same terms as for any other customer.

The price of the service was $1.50 per month, or “five cents per day,” as the marketing people put it. At its peak, the New Jersey system had about 5000 subscribers. However, as the novelty wore off, many subscribers defected, and the service seems to have ended by the end of 1912.

A similar service, the Oregon Telephone Herald, was operated in Portland, Oregon, in 1912. The 1913 advertisement shown below is for the San Francisco Telephone Herald Company, which apparently never began operations, but planned a similar service.

References

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Berlin Declaration, 1945

Generals Montgomery, Eisenhower, Zhukov, de Lattre at signing of Berlin Declaration. Wikipedia photo.

Generals Montgomery, Eisenhower, Zhukov, de Lattre at signing of Berlin Declaration. Wikipedia photo.

Today marks the 70th anniversary of the Berlin Declaration, with which the Allies formally assumed control of German territory, divided it into four sectors, and dissolved the Third Reich.

Among other things, Article 9 ordered that “all radio and telecommunication installations and other forms of wire or wireless communications, whether ashore or afloat, under German control, will cease transmission except as directed by the Allied Representatives.”

It appears that Berlin radio was already off the air.  While Berlin was still listed in the station list of the June 1945 issue of Radio Craft, it was absent from the July list.

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Tinfoil Hat Early Adopter

WashTimes060415

A hundred years ago today, June 4, 1915, the Washington Times carried this story relating the theory of an unnamed patient at the Colorado state asylum. The patient believed that wireless stations were preying upon him and sapping his strength. He wanted the practice of wireless communication banned worldwide.

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1965 Fallout Shelter, Livermore, California

One of three common rooms at the Livermore shelter.  Doors lead to individual family rooms.

One of three common rooms at the Livermore shelter. Doors lead to individual family rooms.

On April 19-23, 1965, a symposium was held in Washington on “Protective Structures for Civilian Populations.” The proceedings of that symposium were published, and contain reports of a number of interesting fallout shelter concepts. Some were mere concepts, but one that had been implemented was a cooperative group shelter near Livermore, California.

The author of that report was Arthur J. Hudgins, who is identified as being with the Livermore Radiation Laboratory. He noted that both he and his associates had concluded that it would be economically practical to build a shelter sufficient for any attack, as long as it did not involve a large nuclear expolosion within three or four miles. But they also concluded that “the post-attack problems to be faced by a single family upon leaving a shelter would be most serious.” After much discussion, they concluded that a shelter group would have a good chance of not only surviving the attack, but also successfully meeting the later problems.

To carry out their plans, they incorporated as Survival Associates, Inc., a California corporation, and set out to build the shelter. By the time land had been procured and building began, 34 families had become members. Initially, obtaining the building permit looked problematic, since “fallout shelter” was not a use mentioned in the county zoning ordinance. But while the application was pending came the Berlin crisis, and the Board of Supervisors quickly came around to the need. The members concluded that the best design would be a corrugated steel arch covered by earth, set on a concrete slab measuring 25 by 142 feet.

Entry to the shelter. A more recent photo of what appears to be the same entry can be found at this site.

Entry to the shelter. A more recent photo of what appears to be the same entry can be found at this site.

The entry doors consisted of surplus steel ship doors, and there was a small room with a generator near each entrance. Near each entry was a shielded observation tower, which would provide a view of the surrounding countryside. Inside, there were 32 rooms for individual families, each measuring 7.5 feet square with an 8 foot ceiling. There were a total of six toilets and three kitchens.

One of the three kitchens.

One of the three kitchens.

Each kitchen was supplied by a 3000 gallon undergound tank, and each pair of toilets was served by a 1000 gallon tank. The tanks could also be refilled from the peacetime water system.

Common areas were lit with flourescent fixtures, and each room was equipped with a 100 watt lightbulb, which could be replaced with a 25 watt bulb if needed to extend generator run time in an emergency.

In addition to the main entries, there were multiple emergency exits, which consisted of sections of the steel structure that opened inward. These were covered with sand, which would fall inward if necessary to evacuate. Ventillation was provided by a positive-pressure system which pumped in outside air near the entries. During tests, the ventillation system proved more than adequate. In fact, when the ventillation system was shut off and the shelter sealed, most occupants did not notice.

The minimum earth cover over the shelter was four feet, which was calculated to provide a protection factor against fallout of more than 10,000. It was estimated that the structure would withstand a blast of up to 30 PSI. The corporation stocked the shelter with a three-week supply of food to supply 2000 calories per day per person. This consisted mostly of bulgar wheet, sugar, dried milk, vegetable oil, and viatimin tablets. In addition, there was dried fruit, coffee, tea, pancake flour, dry soup mix, peanut butter, and vitamin tablets. Most members also had food stored in their individual rooms, and it was estimated that the group would have an adequate diet for about six weeks.

In addition to other supplies, the shelter was stocked with about 1100 gallons of gasoline, which was calculated to be enough to run the generators for six weeks.

The shelter was equipped with a shortwave receiver, and there were “definite plans” to include an amateur radio transmitter.

At the time of the report, there were a couple of vacancies available, and there was also provision to build a second interconnected shelter at the same site if there was sufficient interest.

The corporation conducted some tests of occupancy. One of those was featured in a 1963 newspaper article.  In addition, members had access to the facility at all times with combination locks. During the Cuban Missile Crisis, a number of members stayed at the facility as a precaution.

 

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Secret Transmitter at the Hauptmann Trial?

LindberghCourtroomOn February 13, 1935, the jury in the Lindbergh kidnapping case returned its verdict, finding Bruno Richard Hauptmann guilty, and recommending the death penalty.

The case was the “crime of the century,” and the reporters present at the trial were eager to scoop their colleauges. The courtroom was locked when the jury returned, but the Associated Press figured out a way to get the news out of the courtroom. Their reporter carried a small transmitter in his briefcase, and upon hearing the verdict, he was to send a prearranged code with the news. A nearby AP telegrapher would be listening, and immediately telegraph the news to AP headquarters.

The code for guilty, but with a recommendation for mercy, meaning life in prison, was four dots. That night, the AP scooped the competition, and radio listeners around the country heard the news that Hauptmann would get life in prison. But unfortunately for the listening public (and for Hauptmann), the verdict was actually guilty of first degree murder, meaning the electric chair. The AP issued a correction a few minutes later.

The little mixup was caused by someone else having the same idea. The New York Daily News also came up with the idea of smuggling a transmitter into the locked courtroom, and the Daily News’ signal of four dots meant merely that the jury had entered the courtroom.

This story was recounted 80 years ago this month in the June 1935 issue of Shortwave Craft magazine. The article is probably written by publisher Hugo Gernsback, and as with most of what he wrote, it contains a good bit of self-promotion. He included the photo of a briefcase shortwave receiver that had been featured in the magazine three years earlier, in the June 1932 issue.

SWCraftJune1932

Undaunted by the fact that what he had published had been a receiver, he notes that “with a slight change in the connections, this receiver is easily converted into a transmitter for code signals, such as those used at the Hauptmann trial.”

I haven’t found any corroboration of this incident. Gernsback’s support of his theory comes from his assertion that the reporters in question didn’t deny it when he asked about it. It seems a bit far-fetched, since it depends on both the AP and the Daily News happening to use the same frequency for their clandestine transmitters. Since the transmission would necessarily be so short, it would be imperative for the listener to be tuned to the exact frequency prior to the signal. It seems that the chances of both papers using the same frequency just by chance are pretty slim.

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Scouts Distribute Radios to Blind, 1925

1925ChicagoScouts

Ninety years ago, Chicago Boy Scouts were busy learning how to hook up and operate the Mohawk radio receiver shown here in this photo from the June 1925 issue of Radio Broadcast.  These scouts had been selected by the Chicago Tribune to distribute the sets to blind persons and instruct the new owners on the sets’ operation.

According to the newspaper’s March 15, 1925, issue, the sets were five-tube models and were distributed to persons whose names were submitted by the Council of Social Agencies.

The set appears to be the Mohawk Model A5, a TRF containing five UX201A tubes.

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1958 Phoenix Fallout Shelter

w7pyhshelter

The cozy ham shack shown here is actually the fallout shelter of  William A. Rhodes, W7PYH.  (in the 1972 and 1993 call book, his call appears to have changed to W7KLA.) His Phoenix shelter, along with another one in California. appeared in the March 1958 issue of Popular Mechanics.

w7pyhAntennaHe had a well-equipped underground station.  The unit on top is a Heathkit DX-100 transmitter, beneath which sits an HRO Junior receiver.  The presence of the nameplate on the receiver suggests that this was a military surplus version of the HRO.  The station would have covered 160 through 10 meters.  The large unit on the floor appears to be the speaker/power supply for the receiver.  (The other unit on the floor to the right of the radio equipment is apparently a dehumidifier.)  The antenna, shown here, was a vertical mounted on the ventilation pipe, through which power to the shelter ran.

Power was apparently supplied by commercial power, or perhaps a generator mounted above ground.  The shelter’s floor plans, shown below, don’t make any reference to a generator.

Interestingly, the floor plans do show an oxygen cylinder.  While this might have been of limited utility, it is understandable given the owner’s background.

Rhodes was an inventor and founder of Arizona HydroGen Manufacturing, which manufactures an electrolysis unit which generates a mixture of hydrogen and oxygen which is used immediately for purposes such as welding.  The process seems relatively straightforward, and as far as I can tell, Rhodes never made any extraordinary claims as to it.  However, it seems to have received some attention from those who do make extraordinary claims as some sort of free energy source.  Since he was in the business of hydrolyzing, it’s not surprising that the shelter contained a canister of oxygen.

Rhodes seems to have been a prolific inventor in a variety of areas.  Most notably, he was the co-inventor of U.S. Patent 2594740, an electronic light amplifier with applications in astronomy and in television.  Remarkably, Rhodes’ co-inventor was none other than Dr. Lee De Forest, the inventor of the triode vacuum tube.

And Rhodes’ name is also well known in UFO circles, since he photographed a UFO in 1948.

Rhodes died in 2007 at the age of 90.  According to this site, the shelter remained intact as a computer room until his death.

Floor plan of the Rhodes shelter.  Each room is 9 feet in diameter.

Floor plan of the Rhodes shelter. Each room is 9 feet in diameter.

 

 

References

 

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