Monthly Archives: October 2018

1938 One Tube Regens

1938OctPSThe gentleman shown here is putting together one of three circuits built around a 6C8G tube from the October 1938 issue of Popular Science.

The first project was a battery powered receiver which used half of the dual triode as regenerative detector, with the other half serving as audio amplifier. Plug-in coils allowed the set to tune both broadcast and shortwave bands.

The second project used half the tube as a rectifier, allowing the set to be used on AC or DC household current.

According to author author, Clark Maxwell (not to be confused with James Clerk Maxwell of Maxwell’s Equations fame), the set was able to pull in several European stations from New York City.

Finally, the magazine showed how the tube could be used as a two-stage audio amplifier.

Battery operated receiver.

Battery operated receiver.

AC-DC Receiver.

AC-DC Receiver.

Audio amplifier.

Audio amplifier.



1948 Car Radio/Battery Charger/Shaver Outlet

1948OctREA staple for many years in electronics magazines was the ad for the Progressive Edu-Kit, a kit which could be re-built in 15 different configurations. A review of the kit and copy of the manual can be found at this link.

The full-page ad usually appeared on the back cover of the magazine, and as far as I knew, this was the only product ever sold by the company.  But from the ad shown above from the October 1948 issue of Radio Electronics, it appears that the company started out with a more diverse product line.

In addition to the products shown here, the ad from the Progressive Electronics Co., 497 Union Ave., Brooklyn, NY, included a bike radio and car radio.  (The address is now home to the Beer Boutique.)

Shown here is the ad for a combination car radio/battery charger/electric shaver powerizer. In addition to being a 6-tube radio, the set included a battery charger for the car battery. So on cold winter nights, you could plug the car radio into a 117 volt outlet, it would charge the battery all night, and it would “make winter starting sure.”

And if you were running late the next morning, the radio also included an outlet to plug in your electric shaver while you drove to work.



Graphical Method for Parallel Resistors

1943OctQSTThis handy method of determining parallel resistance (or parallel inductance or series capacitance) appeared in QST 75 years ago this month. It was sent in to Hints and Kinks by O.C. Crossland, W9IXV.  All you need is a sheet of lined paper–it doesn’t even need to be graph paper.  You just need to make two vertical lines.

The example shown here computes the value when the two parallel resistors are 6 ohms and 3 ohms.

Today, this would be a simple application of the product over the sum rule.  You would go to the calculator function of your phone and enter (6 x 3) / (6 + 3), and get the answer of 2.

But believe it or not, in 1943, the phones didn’t have built-in calculators.  In fact, they didn’t have calculators at all!  Instead, this graphical method could be used:  You draw a line from 6 on the left scale to the base of the right scale.  Then, draw another line from 3 on the right scale to the base of the left scale.  The point of intersection of the two lines is the answer, 2 ohms.



1922 Crystal Set

1922Lesson7In 1922, this trio demonstrates that diminutive size of a radio set needn’t mean that the set can’t pull in stations. According to the caption, “how small a set may be, and still be operative over short ranges is shown by the little apparatus that lies on the table.”

The photo appears in Lesson 6 of the seven-part “Easy Course in Home Radio” published in 1922. This group undoubtedly made the parts for their set from scratch, as the photo appears in the lesson entitled “How To Make Your Own Parts.”

The young woman at the right appears to be copying code, meaning that she’s probably receiving the weather report from NAA‘s powerful transmitter in Arlington, Virginia.  Undoubtedly, she donned the headphones since she was the best QRQ operator in the group and wanted to make sure the report was accurately transcribed.



1943: Milwaukee Sends Smokes to Servicemen

1943Oct19MilJournalSeventy-five years ago today, the Milwaukee Journal and its subscribers were doing their part to win the war by sending cigarettes to the fighting men overseas. The October 19, 1943, issue of the paper carried this announcement that the following day’s paper would include an envelope taking up a collection.  Readers were to put some money in the envelope, and give it to their paper boy along with the normal collection.

The newspaper would buy cigarettes for the fighting men at a nickel a pack, and send them overseas in cooperation with the War Department.  A sticker on each pack would establish that the generosity of well-wishing Milwaukeeans made the gift of smokes possible.



1943 Aviation Training for High School Students

1943OctPSSeventy-five years ago, a technically inclined high school student might have given serious consideration to the proposal contained in this ad, which appeared in the October 1943 issue of Popular Science for the Aero Industries Technical Institute, 5247 W. San Fernando Road, Los Angeles,

The ad starts out by reminding that students in technical training might be eligible for a draft deferment, and the school would give students a head start. They could complete their senior year of high school and at the same time gain a year of training in Aviation Mechanics or Engineering. High school courses were taught by state certified instructors, and the aviation instructors were approved by the CAA and military. Upon completion, the student would walk away with a California high school diploma and a certificate for completing the Master Mechanics Course.

Students lived in comfortable new dormitories where they would enjoy wholesome food and real companionship. Campus activities included a band, basketball, and baseball, and students had privileges at the nearby YMCA.

The location of the school today appears to be occupied by the International College of Beauty Arts & Sciences.



Editorial Endorsement: Paul Yang for Ramsey County Judge

I endorse P. Paul Yang for Seat 20, Ramsey County District Court.

As a lawyer, people occasionally ask me about the judicial races on the November ballot. This year in Ramsey County, there is one important judicial race on the ballot. Like most voters, I normally vote for the incumbents, unless there’s a compelling reason to do otherwise.

In this year’s election for Ramsey County District Court, I believe that there is a compelling reason to vote against one of the incumbents. Therefore, I endorse P. Paul Yang in his challenge to incumbent Judge G. Tony Atwal.

Mr. Yang graduated from my alma mater, Hamline University School of Law, in 2002. A Hmong-American, Mr. Yang came to the United States as a child refugee and was the first in his family to go to college. He is in private practice in St. Paul and also serves as a part-time public defender. Mr. Yang is qualified, and I have no doubt that he will serve honorably if elected.

The incumbent, G. Tony Atwal, was appointed to the bench by Governor Dayton in 2016. On January 1, 2018, Judge Atwal was arrested for Driving While Impaired. He subsequently pleaded guilty and was convicted. This was his second offense.

According to findings of the Minnesota Board of Judicial Standards:

Prior to his arrest, Judge Atwal stated to the officer: “So, I live right there. I’m Judge Atwal from Ramsey County.” At least three times Judge Atwal asked to be let go and to walk home. In fact, he was arrested near his residence.

That board concluded that Judge Atwal had violated the Code of Judicial Conduct, including Rules 1.2 (promoting confidence in the judiciary) and 1.3 (avoiding abuse of the prestige of judicial office). Specifically, the board found that Judge Atwal “abused the prestige of judicial office by creating the perception that he was using his position in an attempt to get the police officer to release him instead of arrest him.”

On May 23, 2018, the Board publicly reprimanded Judge Atwal. The board’s order can be seen at this link.

With the seat being up for election within a few months, I believe the Board acted correctly by merely issuing a reprimand and leaving to the voters the ultimate decision of whether Judge Atwal should be removed. And I believe the voters should take that action.

I wish no ill will toward Judge Atwal, and I wish him the best in his legal career. As far as I know, he has served his official duties diligently. But I also believe that the Rule of Law demands that there should be no doubt that judges are acting for the public good, and not in their own self interest. In my opinion, Judge Atwal’s actions when he was stopped called this into question. Mr. Yang is in a stronger position to demonstrate the integrity of the judiciary, and he should be elected for that reason.

It takes a great deal of courage for a practicing attorney to place his name on the ballot to challenge a judge before whom he might appear. Mr. Yang (and Elliott Nickell, another attorney who was defeated in the primary) took that courageous action. I’ll be voting for Mr. Yang for Seat 20.

Incidentally, there are actually two Yangs on the judicial ballot. The other candidate, Adam Yang is running for the open seat, Seat 11, against Scott Michael Flaherty. Both of those candidates appear well qualified, and I am not making an endorsement of either.

When confronted with the ballot, please remember to vote for Paul Yang. If you forget the first names, remember that he is the only Yang who is running against an incumbent. Or, you really can’t go wrong if you simply vote for both of the candidates named Yang.

This page was prepared and paid for by attorney Richard Clem, who is solely responsible for its content. Not authorized or paid for by any candidate or candidate’s committee.  Photo credit: PaulYangForJudge.com.



1968 Soviet 10 Meter AM QRP Transmitter & Receiver

1968-07Model1I’m not quite sure what the function of this Soviet electronic project was. It appeared in the magazine Моделист конструктор (Model Designer) issue number 7 of 1968, with the cryptic title “In the air – the coach.” The magazine covers model building, so at first I assumed that it was a radio control transmitter and receiver. But the transmitter appears to be connected to a microphone, and the receiver is connected to an earphone. So it appears to be intended for voice communication, and it appears to be for the 10 meter amateur band. The text mentions “300 – 500 meters,” so I assume that’s the intended range of the set. Elsewhere in the magazine is a discussion of “what is the procedure for registration and operation of amateur receiving and transmitting radio stations.”

In any event, the illustrations speak for themselves, and presumably some young comrades put together this QRP 10 meter AM station. Here’s the schematic and pictorial diagrams of the transmitter:

1968-07ModelTransmitterSchematic

1968-07ModelTransmitterPictorial

And here are the schematic and pictorial diagrams of the receiver:

1968-07ModelReceiverSchematic

1968-07ModelReceiverPictorial



Happy Birthday OneTubeRadio.com

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We pause from our normal programming today to celebrate the fifth anniversary of OneTubeRadio.com.  Our very first post appeared on October 16, 2013.

We thank all of our loyal readers, and look forward to continuing to provide a unique perspective on the history of radio, as well as other related (sometimes surprisingly) and unrelated content.

 



Uncle Sam & Kaiser Bill Novelty, 1918

1918OctTalkingMachineWorldA hundred years ago this month, the October 1918 issue of Talking Machine World showed this amusing yet patriotic accessory suitable for use on the phonograph when patriotic records were being played.

The figures of Uncle Same and the Kaiser were mounted on the tone arm, and when the music started, Uncle Sam would commence kicking the Kaiser, who was busy playing with his U-boat.

The magazine included the following quote, taken from the New York Sun:

UNCLE SAM KICKS KAISER TO MUSIC

Canned Chastisement Amusing to Sidewalk Crowds.

Uncle Sam, in front of a large and enthusiastic audience, spent most of yesterday kicking Kaiser Bill where such kicks belong. The kicking kept time with martial airs played on a phonograph. The little “Kaiser kicking toy” is for attaching to phonographs so that when songs which have as their theme the “canning” of the Kaiser are play.

Alas, the Armistice came the next month, so it’s difficult to know how many were ultimately sold for $1.50.  But they were available from the National Company, “mechanical specialty manufacturers,” of 281 Congress Street, Boston.