RAN Technology

About RAN Technology


    It all began....

       In my 2nd grade classroom, where the teacher, Mrs. Jeffers, provided something besides the usual puzzles and games for spare-time play.   There were wires, light bulbs in porcelain sockets, knife switches, motors, buzzers, tools...and #6 dry cell batteries.   Several of the boys and I couldn't finish our work fast enough and would have gladly skipped recess to be able to wire up new contraptions that often didn't work, but fascinated us nonetheless....

 

My name is Bob (Robert) Nickels and by the time I'd moved into junior high, I'd graduated to a different kind of bulb - the vacuum tubes that made radio possible.  I'll tell more of my story on the blog here, but suffice it to say I'm a lifelong radio and electronics nut and what started in Mrs. Jeffers classroom has provided me with endless challenges, opportunities, and a career in the electronics industry, (I am now retired from Honeywell), and have the time and ability to indulge myself in my hobby full-time.   I've been a licensed amateur radio operator since age 15, hold an Amateur Extra class license (W9RAN) and have been active on many bands and modes over the years.  But no matter where I've lived or what's been going on in my life, I've never lost the fascination with making things, fixing them when they don't work, and playing radio.

This site reflects my wide-ranging interests and perspectives, from historian to author, experimenter, and developer of my own products  under my business and technology consulting umbrella,  RAN Technology Inc.   It will be an eclectic mix but I'll try to make it worth your time to hang around and see what's new, because I know I will run out of time long before I ever run out of projects and ideas that I want to pursue.   And there comes a time when it's time to share the knowledge, experience, and toys that have been acquired with others.
 

Pull up a chair...

73, Bob W9RAN

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Category: Vintage Ham Radio
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Astro...Don Stoner's legacy

How many of these rare transceivers have you seen? A recent post on the Cubic-Astro mail reflector noted the similarities between the rare CIR Astro 200 and the much more common Cubic Astro 150 transceivers.   And therein lies an  interesting story...I have done a little research on the CIR Astro 200, and the commenter was right - it is the progenitor of the Astro line we are much more familiar with as a result of Swan (already owne...  READ MORE
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Category: Vintage Ham Radio
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The DX-60 Family

what hath Benton Harbor wrought? When an engineer at Heathkit in 1962 turned his attention to designing a replacement for the somewhat flawed DX-40 novice transmitter, little would he have expected the DX-60 to remain in the Heathkit catalog for 14 years.    From the new solid-state power supply to the streamlined apeperance and dependable performace, the new transmitter was instantly popular with novices who had t...  READ MORE
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Category: Crystal Replacement
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Four Channel Oscilaltor board

One board, up to four frequencies Epson programmable oscillators are a good substitute for quartz crystals in many applications, but they're a bit different to use.   First, they are active devices that require DC power, typically 5 volts at 45mA.    Second, like all ICs they are easily damaged by static and voltages that exceed the design limits.   Finally they are in DIP packates that are i...  READ MORE
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Category: Crystal Replacement
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Programmable Oscillators - the modern day "rock"

Cheaper and more accurate and stable than the old type With the demise of  International Crystal in 2018, hams and experimenters lost the last US-based source of affordable one-off custom crystals.  (And the definition of "affordable" ended up over $30 each).     Sure there are some offshore sources but the reality is, manufacturing one crystal to a specific frequency is not simple or inexpensive, and all crysta...  READ MORE
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Category: Vintage Audio
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"A Pair of 6V6s"

What more does one need to hear good audio? The first audio amplififer I made (that worked) used a single 6V6 to amplify the output of a regenerative receiver.    Ever since they've been my idea of what a good audio tube should be and with a big speaker mounted on a piece of plywood, a 6V6 will produce "room filling volume" as the magazine articles fo the day said.   But as my music tastes grew acousti...  READ MORE
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Category: VERSA-TR Information
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Does the VERSA-TR protect my receiver while transmitting?

An important question - and the answer is YES! My primary aim when desiging the VERSA-TR was low power transmitters, and to protect the receiver from potentially damaging voltages when transmitting. 100 watts into 50 ohms is a +50dBm signal.  I'd measured the attenuation at the receiver connector in the labe at -60 to -70 dB (depending on frequency), which means that should result in -10 to -20dB at the receiver, which should be ...  READ MORE
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Category: VERSA-TR Information
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VERSA-TR Panadaptor Video

Use the VERSA-TR to improve your SDR panadaptor An inexpensive SDR like my RANVerter Pi Plus can add a panoramic spectrum and waterfall display to almost any vintage (or modern) radio.    The ability to use the SDR as a 2nd receiver that can be tuned to a different frequency or mode from the main transceiver is a real plus, but annoying feedback and delayed audio will be normally heard through the PC speakers in the transmit mode...  READ MORE
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Category: VERSA-TR Information
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Using VERSA-TR as an RF-actuated switch

The muting relay on the VERSA-TR can be used to control other devices when RF is present.   An example would be an "On The Air" sign, or to key an amplifier.    One specially-wired cable is required - note that no connection is made to the sleeve, which is usually the ground connection on a TRS plug.  A normally-open set of relay contacts exists between the ...  READ MORE
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Category: VERSA-TR Information
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Using VERSA-TR with conventional speakers

Muting requires a different speaker connection VERSA-TR can be used to mute conventional (non-amplified) speakers as would be used with a non-SDR receiver.    This requires the user to wire up two cables with 3.5mm (1/8") stereo plugs on one end.   Note that connections are made to EITHER the tip or ring of the connector and to the sleeve which is normally the ground return.   It doesn't matter whether yo...  READ MORE
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Category: VERSA-TR Information
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TRS (stereo audio) plug reference

3 circuit TRS, 1/8" (3.5mm) diameter plug Just for reference, the common 1/8" dia. stereo plug which is used for VERSA-TR speaker/audio connections.   The three connections are commonly known as Tip, Ring, and Sleeve, but are typically wired as Left, Right, and Ground in stereo audio hookups.   ...  READ MORE

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Take the Boatanchor Survey!

Let authors and organizers know what you're interested in
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Announcing the VERSA-TR (as seen in Dec. 2018 QST)

A Versatile T/R solution for SDRs and vintage radios
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Mike Beachy N8ECR - SK

"If there's a ham radio heaven, they've got a hell of a net control operator"
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DX-60 Website Announced

Celebrating the fun of low-power AM

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