RAN Technology
Welcome to RAN Technology!
VIEW News Item
Posted: 09/21/2020
Comments: 0

The Old QSL Card site is back

who doesn't love old QSL cards? After the old Google+ site was shut down by Google, the amazing online collection of old QSL cards maintained by Bob Green, W8JYZ, has a new home - at his website.     Browse thousands of vintage QSL cardsIt doesn't take long to find a memorable name or callsign - maybe even someone you know!Please share your appreciation with W8JYZ at the link on the home page for providin...  READ MORE
VIEW News Item
Posted: 09/12/2020
Comments: 0

Spartanburg Hamfest - sanity in the age of COVID-19

Intelligent risk-management by attendees Sanity!  Individual responsibility!From the BRARS webpage:Welcome to the Blue Ridge Amateur Radio Society (BRARS) HamfestBy purchasing a Hamfest ticket, You are acknowledging that an inherent risk of exposure to COVID-19 exists in any public place where people are present, “While attending the BRARS Hamfest you and any guests that you may bring voluntarily assume all risks related to ex...  READ MORE
VIEW News Item
Posted: 09/11/2020
Comments: 0

Beaker Street returns to the air!

If you remember it, you were there! If you remember "Beaker Street" it's about the best news ever!   Otherwise this will seem like going to someone else's high school reunion...In the late 60s, for kids living in "flyover country" in most small towns in the midwest, there were not many local rock and roll radio stations that could be heard during the day.   But with sunset came the ski...  READ MORE
VIEW News Item
Posted: 06/08/2020
Comments: 0

Hamfests Return!

A quick look at the Wauseon OH swap on June 6, 2020 Thanks to Rex WA6GYC for this short video of the Wauseon OH swapfest - one of the first to be held in what is otherwise "the summer without hamfests".   Bryan KB8ELG, club president and promoter, put an AN/GRC-9 field radio on the air, hand-crank power and all!   Full information can be found at the club's website  http://k8bxq.org/hamfestAccording to Rex,&nb...  READ MORE
VIEW News Item
Posted: 02/24/2020
Comments: 0

Soviet Spy Radio found in forest

(oh yeah, I put that there...I'll take it now thanks!) COLOGNE, GERMANY—According to a Live Science report, archaeologist Erich Classen of the Rhineland Regional Association and his colleagues were looking for a Roman villa in western Germany when they unearthed a Soviet spy radio that had been sealed in a metal box and hidden along a path through what was the Hambach Forest, just a few miles away from a nuclear research center and military air ...  READ MORE
VIEW News Item
Posted: 02/11/2020
Comments: 0

Announcing the W9DYV Radio Society

honoring SSB pioneer Wes Schum W9DYV Nick Tusa, K5EF,  longtime friend of Wes Schum and organizer of the W9DYV-Central Electronics Technical Symposium for a number of years, has announced that the W9DYV callsign will again be active, as the club callsign of the W9DYV Radio Societ NFP. Congratulations to Nick and friends for memorializing Wes Schum's contributions to amateur radio in this way!...  READ MORE
VIEW News Item
Posted: 08/26/2019
Comments: 0

WBBM-AM tower moves to Bloomington IL

watch the old tower fall (video link below)  The WBBM-AM radio tower has moved out of Itasca and found a new home in Bloomingdale.After 77 years, the over 680-foot WBBM-AM radio tower came down Thursday in Itasca. The property sold for development and WBBM Newsradio's new tower will now be located in Bloomingdale, at the same site as its sister station,WSCR (670 The Score), and will be diplexing off of their tow...  READ MORE
VIEW News Item
Posted: 07/21/2019
Comments: 0

Apollo 11 and Collins Radio

“Every American voice transmitted from space was via Collins Radio Co. equipment” Those who may be interested in the technical details and the history of the space program leading up to Apollo should find plenty of interesting reading at this site:https://www.hq.nasa.gov/office/pao/History/SP-4204/contents.htmlUsed with permission.The Manned Space Flight Network antennas operated in the S-Band, on frequencies around 2.2 GHz. The system employed was known as the "Unified S-...  READ MORE
VIEW News Item
Posted: 06/17/2019
Comments: 0

Google gets stung for swiping content thanks to embedded morse code

Dah-dit hits crash dot-dash cash-bash From The Inquirer:GOOGLE HAS FALLEN for a sting which is said to have proved the firm is 'stealing' data from a rival website.Genius.com, a site specialising in providing song lyrics, had suspected that Google had been scraping its site and using the lyrics to populate the 'information panels' often seen in the side of search results.This isn't that uncommon, but...  READ MORE
VIEW News Item
Posted: 05/28/2019
Comments: 0

Hara Arena badly damaged in Dayton Tornado

Drone footage shows extensive damage The City of Trotwood OH is under an emergency declaration and the Hara Arena suffered extensive damage when tornadoes and severe storms moved through Monday night.   Drone footage shows the roof and side of the structure blown off in several places.WATCH...  READ MORE

Show All

VIEW Article
Posted: 09/16/2020
Category: Vintage Ham Radio
Comments: 0

EF Johnson Transmitter Sales

How many did they sell? EFJ transmitter sales data from former employees....  READ MORE
VIEW Article
Posted: 09/12/2020
Category: Vintage Ham Radio
Comments: 0

The Hallicrafters FPM-200

A glimpse of the future from 1957 Like most hams, I remembered seeing the FPM-200 at an astronomical price in the 1962 Allied Radio catalog and wondering just how rich would a person have to be to own one?    For my 11 year old self, such things may as well have been on another planet, but well...things change.I'd seen only one FPM-200 sold (to a guy ahead of me at a hamfest) and in the pre-eBay era most rare ra...  READ MORE
VIEW Article
Posted: 09/06/2020
Category: Technical
Comments: 0

why 50 ohms?

The Forgotten Impedance  Why do we use 50 ohm cables?    If you're like most hams the answer is:  "I dunno!"In fact, it's a compromise (like most things in life) - between lowest loss when handling power and voltage breakdown, as Belden engineer Steve Lampen explains hereA pdf copy can be found below as well.   And now you know!...  READ MORE
VIEW Article
Posted: 09/01/2020
Category: Crystal Replacement
Comments: 0

"Crystal Plugs"

DIY version by "RAN Crystals" Crystal sockets were popular for pluging in ... crystals, of all things!   But they were also used for other purposes, such as the antenna relay connection on some EF Johnson transmitters.    If you want to connect a VFO to a transmitter with just a crystal socket, for example, you're going to have to either carve up an old FT-243 type crystal or if you want to outboar...  READ MORE
VIEW Article
Posted: 08/14/2020
Category: Historic
Comments: 0

A visit to the D J Everett III Radio Room

Honoring the legacy of a small town radio station owner Many successful career people are grateful for mentoring they received on the way to the top. But few have honored a memory as passionately as has been done by Beth Mann.   She's the owner of Ham Broadcasting which owns five stations in western Kentucky but the story is about her mentor, the late DJ Everett III who started WKDZ in Cadiz Kentucky in 1966.   Everett worked as...  READ MORE
VIEW Article
Posted: 08/13/2020
Category: Vintage Ham Radio
Comments: 0

Multi Products Model CM-1 Conelrad Monitor (Motorola DS9660)

another obscure Elmac returns to the air Bob Heil's favorite radio is the Moseley CM-1 which the developer, John Clemmons, told Carl Moseley stood for Clemens Manufacturing number 1.   "No", Mr. Moseley said, "That stands for Carl Moseley number 1!"As that may be, there's yet another CM-1 receiver and it was made by the Multi Products Company of Oak Park, Michigan.As wikipedia states:  "CON...  READ MORE
VIEW Article
Posted: 07/09/2020
Category: Vintage Ham Radio
Comments: 0

All Band Inexpensive 40 Watt Transmitter

a great "first homebrew xmtr" project  Jay Miller KK5IM recently wrote an article in Electric Radio magazine about fulfilling his dream of building a homebrew "AM Kilowatt" transmitter (375 watts output by today's standards).     His crystal-controlled exciter that drive the 813 was based on his Novice transmitter, which was built by his grand-uncle back in the 1960s when Novice class hams were l...  READ MORE
VIEW Article
Posted: 06/20/2020
Category: Technical
Comments: 0

Bias control of Class E amplfiers

Previously undocumented phenomenon Micro SDR innovator Guido PE1NNZ has implemented polar modulation using an Arduino MCU and a class E PA.   For more informartion on this fascinating project, join the discussion group at https://groups.io/g/ucxInitially, Guido's design implemented the polar or EER modulation scheme using modifications to the QCX CW transceiver hardware in the traditional way as described by Leonard K...  READ MORE
VIEW Article
Posted: 06/06/2020
Category: Vintage Ham Radio
Comments: 0

Lysco "Transmaster" Mobile Transmitter

a seldom-seen cutie from the golden age  I'm always intrigued by the odd and unusual ham gear that I remember seeing in catalogs as a kid but have seldom seen after hundreds of hamfests and uncountable for sale listings.   One such is the Lysco mobile transmitter which was produced by the Lysco Manufacturing Company of 1401 Clinton St. Hoboken NJ between 1949 and 1953.   Despite being a very cute and co...  READ MORE
VIEW Article
Posted: 06/06/2020
Category: Technical
Comments: 0

Class E Notes

the result of experiments with high efficiency class E amplifiers  There is a lot of misunderstanding about how a Class E amplifier works.     As the result of studying the literature and experimenting, I thought I'd share what I have learned over the past several years.   Below is an example of a test amplifier I used to optimize my 2 watt wspr transmitter boards.   It can be visualized as two circuits - the...  READ MORE