WOW Omaha Turns 18, 1941

WOW1941Radio station KXSP, Omaha, first came on the air in 1923. The station is probably best known for the WOW call letters that it bore from 1926 to 1999, representing its owner, Woodmen of the World Life Insurance Society. When it first came on the air, those call letters were not available, since they were assigned to the steamer Henry J. Bibble. Instead, the station signed on as WOAW. When that ship was scrapped in 1926, the station took over those call letters.

When the station reached the age of majority eighteen years later, it held a birthday party, and invited six young Omaha women who were born the same day. The six are shown here, and they are, from left to right, Blanche Zaloudek, Roslyn Levy, Jacqueline Giles, Helen Rummelhart, Elaine Kinzli and De Lorse McCarty. They appeared in the May, 1941, issue of the station’s program guide, Radio News Tower.

Seven years later, the young woman on the left had married, and was known as Blanche Howard. Her uncle, J.F. Zaloudek, died in Kansas without a will, and Blanche was one of the heirs. She inherited a portion of some property in Wilson, Kansas. Shortly thereafter, Blanche, along with one of the other heirs, was back in court. It turned out that her uncle had a judgment against his brother, another one of the heirs. She went to court to seek to enforce this judgment, and the case ultimately went to the Kansas Supreme Court. In its opinion in the case, Zaloudek v. Zaloudek, 171 Kan. 72, 229 P.2d 727 (1951), that court held that Blanche and the other heir didn’t have standing to revive the judgment against the brother.

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

1936 Four Tube Portable

1936MayPM

The family shown here is enjoying the radio during their picnic, courtesy of a four-tube superheterodyne portable built from plans in the May 1936 issue of Popular Mechanics.

The set used a 1A6 doing double duty as oscillator and mixer, with a type 33 serving as IF amplifier, type 32 detector, and type 33 audio amplifier driving a permanent magnet speaker. The A battery was 3 volts, dropped through a resistor for the 2-volt tubes. The set also used three 45 volt B batteries in series. The result was a set that was “not only handy for beach and picnic use, but also makes a fine battery set for homes not equipped with electricity.”

The set’s chasis was mounted vertically, with the speaker mounted at one end of the case.

1936MayPM2

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

1941 National QSL Disc

1941QSLdisc

Here’s an idea from 75 years ago that apparently never caught on. It’s a QSL “card” in the form of a recording disc. Using a recorder such as the Wilcox-Gay Recordio, the operator would record the other station’s signal. Then, the traditional QSL data would be written in with a “special marking ink.” The blanks were from the National Recording Supply Co. of Hollywood, California. The manufacturer promised “unlimited playback with wide frequency response and a minimum of surface noise.” The blanks retailed for a dime each. This example was shown in the May 1941 issue of Radio News.

The disc is marked “Copyright Pend. National QSL Disc.” The magazine’s April 1941 issue provided more detail. It noted that “recent developments indicate that many amateurs now possess recording equipment and, instead of the old-time postcard, now use a disc to record other amateurs’ talks and send them through the mails.”

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

1936 One-Tube AC-DC Regenerative Receiver

1936MaySWCraftThe plans for this little one-tube regenerative receiver appeared in Shortwave Craft magazine 80 years ago this month, May 1936.

It runs off household current, using a 12A7 tube, which is a dual tube containing a rectifier and pentode. The rectifier supplies the B+, and the pentode is a regenerative detector. Plug-in coils are used, for either the broadcast band or shortwave. The article recommends starting out with the standard broadcast band, where tuning is less critical. Once the operation of the set was mastered, then the builder could order a set of coils for the shortwave bands.

The filament voltage is supplied from a “curtain burner” line cord, with 350 ohms of resistance built in to drop the line voltage down to the 12 volts required by the tube.  The circuit diagram is shown below.  Filtering of the rectifier output is accomplished with a dual 4uF capacitor in series with a 50,000 ohm resistor.  A modern recreation of this circuit would probably make use of a heftier electrolytic capacitor.

As with any AC-DC set, some caution is called for, since many of the components, and possibly the chassis, will be exposed directly to the “hot” side of the line current.

1936MaySWCraftDiagram

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

NPOTA: North Country Scenic Trail, Jay Cooke State Park, MN

JayCookeToday, I did a National Parks On the Air (NPOTA) activation of the North Country National Scenic Trail, a hiking trail that extends from eastern New York to North Dakota.  My operating location was in Jay Cooke State Park, Minnesota, about 25 miles south of Duluth.  My operating location is shown here.  The radio itself, my  Yaesu FT-817, is barely visible propped up by the bright blue canvas bag, in front of the dark blue bag.  The 12 volt battery is on top of the bright red bag, and my lunch is inside the dark red bag.  The cable going up to my antenna is visible, but the antenna, a 20 meter dipole tied to trees with string, while in the frame, is not visible.

During NPOTA, amateur radio operators set up portable stations at National Park units and make contact with other amateurs at home.  The event has been very popular, and there have been hundreds of thousands of contacts made from the parks.  Since the event includes all units of the National Park Service, the North Country Trail qualifies as a “National Park,” allowing me to operate from one of the Minnesota state parks crossed by the trail.

During today’s activation, I managed only four contacts, the furthest being Mississippi.  According to the Reverse Beacon Network, my signal was getting out.  Unfortunately, many chasers don’t bother looking for stations.  They wait until they’re spotted on the internet, and then work them.  So making that first contact can be a challenge.  Since I was only there for a brief stop over lunch, I didn’t bother persisting to make six more contacts.  But I’ll be operating from this spot again on June 5 as part of the Light Up The Trail event being done in conjunction with NPOTA.  During that event, stations will be set up at various locations along the North Country Trail.  I decided to do a trial run today, since I’m in Duluth to present a Continuing Legal Education program on Friday morning, and then serving as a delegate to the Minnesota Republican State Convention on Friday and Saturday.

The swing bridge at Jay Cooke State Park was washed away.

2012 flooding of bridge. USGS photo.

Swinging Bridge prior to 2012 flood. Wikipedia photo.

Jay Cooke State Park was originally created in 1915 by a donation of land from the St. Louis Power Company. It remained undeveloped until the 1930’s, when the Civilian Conservation Corps built many of the park’s structures, including the iconic Swinging Bridge over the St. Louis River. The bridge was destroyed by flooding in 2012 but subsequently rebuilt according to the original plans. As you can see from the picture at the top of the page, my operating location was near the bridge and near the River Inn visitor center in the picture shown below, also constructed by the CCC.  The North Country Trail passes over the Swinging Bridge, putting my operating location well within the 50 yards from the trail required by the NPOTA rules.

River Inn Jay Cooke.JPG

River Inn Visitor Center, Jay Cooke State Park. Wikipedia photo.

This stretch of the St. Louis River consists of a long rapids impossible to traverse by canoe. Therefore, both Native Americans and Europeans portaged around the rapids, and this portage remained in use until the 1870’s.

Starting in the 17th century, the portage was used heavily by fur traders, since it formed part of the route from the Great Lakes to the Mississippi River basin.  The voyageurs had to traverse the 6.5 mile portage through the area, carrying two or three packs weighing about 90 pounds each.  It took three to five days to cross the portage, and the voyageurs doing so would be covered with mud and insect bites.  My activation today was not quite so strenuous.  It required me to carry my complete station, including battery, radio, and antennas, weighing a total of about 10 pounds, a total of about 100 yards from the parking lot to the picnic area.  And even though I got mostly skunked, I bet the voyageurs who traversed the area a few centuries ago would never dream that it would someday be possible to toss a wire into a tree and talk halfway across the continent with a piece of equipment that would have made only a small dent in their 90 pound packs.

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

GE Model LB-530 Portable, 1941

1941LifeGEportable

This ad for General Electric portable radios appeared in Life Magazine 75 years ago today, May 19, 1941. The main model featured, model LB-530, was a five-tube broadcast set with a tube lineup consisting of 1A7GT, 1N5GT, 1N5GT, 1H5GT, and 1Q5GT. While billed as being able to run off the internal storage battery or AC, this wasn’t entirely correct. The set always ran from the 2 volt battery, getting its 90 volt B+ from an internal vibrator power supply. The AC current would merely charge the battery, meaning that the set couldn’t really be run without a battery in place. I did have a similar model at one time, and by the time I got the radio, the lead-acid battery was long gone. The set would pull in a few strong stations without the battery in place, but the battery was an indispensable part of the circuit. The set also had provision for charging from a 6 volt car battery.

A nice example of the set can be found at this site.

The radio had a retail price of $39.95. The ad also featured other portables designed to run from dry cell B batteries, starting at $16.95.

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

WW2 Wireless Code Practice Oscillator

1944JunePM

A young man drafted into the military during World War II could give himself an edge by having a useful skill, and the June 1944 issue of Popular Mechanics reported that pre-induction code practice sessions were well attended. This created a problem, since most code practice oscillators used headphones, and acquiring enough headphones presented a logistical challenge for those running the sessions.

1944JunePM2The solution was offered in the form of a three-tube wireless code oscillator which would transmit modulated CW to a nearby broadcast receiver, producing room-filling volume. In light of wartime parts shortages, the circuit called for common receiver tubes which could probably be scavenged from another set. The plans called for a 6C5 rectifier, witn 6J5’s serving as AF and RF oscillators. The 6 volt filament voltage was obtained by wiring a 40 watt lightbulb in series with the filaments. The completed circuit is shown here mounted on a circular cutting board. The output of the oscillator was run to the receiver’s antenna jack, or simply placed near the set’s antenna.

1944JunePM3

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

Helen Marshall, NBC Radio, 1936

HelenMarshall1935Pictured here in the May 1936 issue of Radio News is Helen Marshall, one of the three named “Miss Radio of 1936” by radio pioneer Nils T. Granlund, the other two being Dorothy Lamour and Harriet Hilliard (later known as Harriet Nelson of Ozzie & Harriet fame), also of NBC.

She was the leading soprano of Sigmund Ramberg’s Studio Party, heard Tuesday nights on NBC.

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

NPOTA: Minnesota Veterans Home

VAHomeOperating

Operating at the Minnesota Veterans Home with the Mississippi in the background.

This morning, N0AIS and I set up for a couple of hours at the Minnesota Veterans Home in Minneapolis to do a demonstration of ham radio for the residents and visitors, and to “activate” RV04 (the Mississippi National River and Recreation Area) for ARRL National Parks On The Air (NPOTA) event.  This 72-mile long unit of the National Park Service passes through Minneapolis and St. Paul, and provides numerous opportunities for recreation.  I’ve operated from other locations along the river, but since the Veterans Home’s park-like campus is along the river, we obtained permission to use NPOTA as an opportunity to share Amateur Radio with some of the vets living there.

We had originally planned on operating from a courtyard, but due to the cold temperatures this morning, we were offered a spot inside in a sun room overlooking the river.

N0AIS photo.

N0AIS photo.

We were able to open one of the windows enough to get a wire through, so while I set up the radio inside, Jim put up a dipole outside. Within a few minutes, we were on the air. Since the antenna was on the east side of the building, we didn’t put out much of a signal to the west, but we made about 60 contacts with the eastern U.S., as well as contacts with Belgium and Italy.

N0AIS photo.

N0AIS photo.

One of the vets took us up on our offer to get on the air, and told one of our contacts about his service. We had one WW2 radio operator in the audience. She didn’t want to get on the air, but she did send a few letters with a code practice oscillator we had brought along.

The Minnesota Veterans Home was founded in the 1888 as the Old Soldiers Home, as a residence for indigent Civil War veterans.  It currently provides high quality care for over 300 veterans.  It’s located on a 53 acre campus near Minnehaha Falls.  The property adjoins the Lock and Dam Number 1 (the Ford Dam) on Mississippi River.  As you can see from the pictures, the room from which we were operating is directly over the lock.

I would like to especially thank Jim, N0AIS, for providing most of the equipment (and doing more than half of the work), and to the staff of the Minnesota Veterans Home for making this event possible.

Click Here For Today’s Ripley’s Believe It Or Not Cartoon



 

 

Stealth Slinky Antenna

SlinkyAntenna1Forty years ago, the May-June issue of Elementary Electronics carried an interesting idea for a stealth antenna. While the article was aimed at SWL’s, the idea is equally intriguing for hams confronted with the need for a clandestine antenna.

I’ve operated with antennas hanging down from the side of a building. They’ve generally performed well, although depending on the type of construction, they often get out better in one direction. For short-term use, I generally just let a wire out through an open window and retract it when needed. The idea shown here automates the process a bit.

 

As you can see, the antenna itself consists of a Slinky®, mounted in a tin can just outside the window. To extend and retract it, it’s connected to an inexpensive fishing reel inside. To keep everything neat, there’s a piece of conduit running between the reel and the can. To deploy the antenna, you simply push the button on the reel. When you’re done with it, you simply reel it in. To keep prying eyes from noticing, the article recommends painting everything black.

Exterior portion of the antenna.

Exterior portion of the antenna.

 

 

 

 

 

Interior view.

Interior view.

 

Click Here For Today’s Ripley’s Believe It Or Not Cartoon