Articles
Information on shortwave radio and SWLing
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A 3D Printed Socket for FT-243 Crystals
Lots of us have crysals in the FT-243 type holder from our Novice days and since, but the sockets needed for them are becoming hard to find. To address this I designed a socket that can be 3D printed in about 15 minutes that will substitue for the old style panel-mounted socket used on many transmitters and in homebrew projects. You'll need to scavenge two con... READ MORE |
 W9RAN 03/85/2023 |
On the workbench |
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Test those 6146s!
"The most sensational beam power tube to come your way!" was the banner headline for RCA's 1952 ad promoting the new 6146 tube. Sensationalism aside, there's no doubt that more Novices first RF came from a 6146 than any other tube and its popularity even grew during the sideband era when "a pair of 6146s" was found in many SSB transceivers from the high-end Co... READ MORE |
W9RAN 03/85/2023 |
Heat up the iron |
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Your Future With Teletype
The 1950s were a time of high growth for many companies - especially those involved in communications and electronics. So what young ham would not be tempted to think about working for one of the largest data communications companies in the world - a future with Teletype? Download the booklet at the attachments link below for a look at how Teletype sought to attract technicians, eng... READ MORE |
W9RAN 03/80/2023 |
Looking Back |
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Teletype Corp.
Download the document "The New Look At Teletype" which appeared in 1960 that offers a glimpse into the operation of one of the largest data communications companies of its time. The Teletype Corporation of Skokie IL, a part of American Telephone and Telegraph Company's Western Electric manufacturing arm since 1930, came into being in 1928 when the Morkrum-Kleinschmidt Company changed its na... READ MORE |
W9RAN 03/75/2023 |
Looking Back |
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Johnson Viking II - CDC
Lots of Johnson Viking II transmitters were made but every so often the much less seend "CDC" model turns up. What was different about it, other than the Civil Defense decal on the front panel? Find out by reading the EF Johnson "Design File" below.... READ MORE |
W9RAN 03/72/2023 |
Fone Forum |
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Improve the efficiency of your vertical antenna
Rob Sherwood NCØB is best known for his receiver tests but as a DXer and contester, Rob has paid a lot of attention to antennas over the years. Since the '70s he's been using and working to improve the effectiveness of vertical antennas and recently shared some of his findings at a presentation at the W9DYV Technical Symposium at the St. Louis Suburban Radio Club's Winterfest ... READ MORE |
W9RAN 03/67/2023 |
On the workbench |
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Must-have accessory for your NanoVNA
The NanoVNA is an amazingly useful piece of inexpensive test equipment for the ham and experimenter. Anyone working with RF needs one! Perhaps the most useful application for homebrewing or repairng radio equipment is the ability to make S21 measurements, that is to view the transmission characteristics of any RF device, such as a crystal, an amplifier, or a tuned circuit. ... READ MORE |
W9RAN 03/64/2023 |
On the workbench |
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Phillips Tube Substitution Guide
Ever run into a weird tube in a foreign-made radio, maybe one with an EL or EM part number? This 1965 cross reference from one of the largest tube manufacturers in Europe might help. Download it from the Attachments sectio below.... READ MORE |
W9RAN 02/56/2023 |
Tech Library |
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Old Buzzard George - W1GAC
Many hams operating AM today didn't have the opportunity to hear some of the true AM legends while they were alive and on the air, but thanks to W1DAN's excellent profile, we can appreciate one of the finest homebrewers and long-time AM operators - W1GAC. George Mouridian passed away in 2007 at the age of 91 but had been an active ham for over 70 years and while he did us... READ MORE |
W9RAN 02/55/2023 |
Fone Forum |
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What is Q?
What is Q? A concise definition: "In physics and engineering, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. "We know it's important in RF circuits - low Q coils or tuned circuits will result in loss and perform inefficiently. We may remember from the Handbook that the Q of a coil equals the ... READ MORE |
W9RAN 02/52/2023 |
Tech Library |
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