RAN Technology

The way it was


Historic 0 Comments 01/02/2022 

when HAMS ran electronics companies

Posted By: Robert Nickels (ranickels)

We hear a lot about "tech giants" nowadays but there were tech companies back in the 50's and 60's that were run by actual techies...no offence to those today who can write code, but when most of us think "tech" we think of circuits and metal chassis and solder fumes. 

An interesting example comes from the files of the Hallicrafters SR-2000 "Hurricane" which was the first desktop kilowatt transceiver.   When it was released in 1966, I'd bet Hallicrafters was aiming primarily at the SSB user, but that didn't stop Al Kahn, who was President of Electro-Voice Company from shaking one of the new rigs down and letting Hallicrafters know what he thought.      Here's his letter to Hallicrafters sales manager Curt Hammond (but note who is copied in the handwritten notes) - followed by the company's reply (scroll down for larger images and click to read)

One can probably assume that Mr. Kahn's suggestions were giving a higher priority than ones from ordinary hams, but the point is - he WAS basically an ordinary ham.  His comments were based on his actual experience using the SR-2000, not because of his position in an electronics company.   

Hallicrafters never did add the crystal filter, but the odd thing is, they DID include one in the SR-400 Cyclone which is nearly the same radio except fo the power supply and PA.    Given the larger chassis it wouldn't have been difficult and would have broadened the appeal of the SR-2000 for CW operators - wonder why they didn't?  (I mean for everybody else, not just for Mr. Kahn!)

Al Kahn had a pretty nice rig in the AM era too!

 

Click on the image title or on the image itself to open the full-sized image in a separate window.

  

The Pioneer 530

made by JAARS for Wycliffe Bible Translators
Category: Vintage Ham Radio
In 1917 a missionary named William Cameron Townsend went to Guatemala to sell Spanish Bibles. But he was shocked when many people couldn’t understand the books. They spoke Cakchiquel, a language without a Bible.   He believed everyone should understand the Bible, so he started a linguistics school (the Summer Institute of Linguistics, known today as SIL) that trained people to do Bible ...  READ MORE
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    Visitors to the Elgin National Historic area along the Fox River in Elgin Illinois may not realize they are at the site of a famous shortwave radio station - W9XAM - the time signal station operated by the Elgin Watch Company.Elgin was the only watch company maintaining an observatory that observed, recorded and broadcasted time from the stars correct to the hundredths of a second. Located a...  READ MORE
- Robert Nickels (ranickels),  05/09/2022 
  

The Mosley Commando II

Made in England and scarce even there
Category: Vintage Ham Radio
The Mosley CM-1 receiver is quite well known and not especially hard to find in the US even though it was the only radio produced by the company that has been well-known for antennas since 1939.   Or is it...?A full-page ad (advert for you on the other side of the pond) appeared in the RSGB Bulletin in 1963 for a nice looking and very capable SSB transmitter called the "Commando II&...  READ MORE
- Robert Nickels (ranickels),  04/15/2022 
   I'm not ready to publish a description of exactly HOW it works, but 20 minutes effort with scissors and tape produced a prototype  Droplet Energy Generator that allows me to say for sure that IT WORKS!I duplicated the design shown in this video.   I wrapped a scrap of plastic in aluminum foil, then applied a strip of double-sided tape and to that attached a piece of PTFE thread-...  READ MORE
- Robert Nickels (ranickels),  03/30/2022 
   When I was first licensed in the 1960s in Nebraska, two groups of hams were commonly heard on the air before those with jobs got off work - other teens like me and the disabled hams.   Some of my earliest Novice ham buddies were blind students at the Nebraska School for the Blind in Nebraska City, and there were many other visually-impaired hams, all of whom were exceptional operators, e...  READ MORE
- Robert Nickels (ranickels),  03/21/2022 
   Old style mica capacitors were used in the pi-net matching sections of several vintage transmitters and the combination of age, heat, and high RF currents have made them likely failure items.   My Collins 32V-2 transmitter was to the point where it would not properly load to full power on 75 meters so something had to be done.   Mica capacitors are no longer made but fortunately new...  READ MORE
- Robert Nickels (ranickels),  03/19/2022 
   I found myself wanting to convert various frequencies to other frequencies and wanted a cheap and easy solution, so I designed a simple "universal converter" using the NE-602 and a programmable oscillator from Epson.  I'd used the same combination in hundreds of "RANVerter" SDR Upconverter projects since my Dec. 2013 QST article and knew that while there were limitatio...  READ MORE
- Robert Nickels (ranickels),  03/17/2022 
   It's always a challenge to hold PC boards during assemly and testing.  After purchasing a magnetic holder from Amazon  I realized I wanted more and could easily make as many as I wanted using inexpensive 3 mm hardware from eBay and some strong "fridge magnets".     All that's needed is to epoxy a standoff to the magnet - both tapped and threaded ...  READ MORE
- Robert Nickels (ranickels),  03/09/2022 
   The Si5351 has been the biggest boon to homebrewers since the invention of the NE-602, especially now that quartz crystals are essentially obsolete.   But it's redundant to run the output of the 5351 through a johnson counter to develop the quadrature signals required for QSD/QSE SDR front-ends when there are three clock outputs available and the IC allows for phase offsets. &nb...  READ MORE
- Robert Nickels (ranickels),  03/09/2022 
   It's pretty well accepted that the Pacemaker was not EF Johnson's finest effort.   In fact it was the first of several failed attempts by the King of the AM Transmitters to make the transition to SSB.    In the end, it was the rise of CB popularity that kept the company viable, along with its component business, while their ham business gradually faced away. &...  READ MORE
- Robert Nickels (ranickels),  03/03/2022 

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