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    • Hurricane Ian (2022)

      Hurricane Ian (2022)

      K3MRI posted a topic in Weather and Climate,

      Our thoughts go out to all Floridians, and to all of our Floridian amateur radio operators who are bracing, as I write, for Hurricane Ian. This image from my radarscope is so scary.
        • Agree | Support
      • 2 replies
      K3MRI

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    • Own old gear?

      Own old gear?

      K3MRI posted a topic in Nostalgia & History,

      I wonder how many of us own old gear. I'm talking transceivers, transmitters, receivers, and maybe linear amplifiers. Let's pick a random date: 1990. Who still actively uses gear from pre-1990 and what type of gear?
      • 5 replies
      K3MRI

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    • Miklor Radio Information Site

      Miklor Radio Information Site

      K3MRI posted a link in Publications and information websites,

      Not sure how to best describe this website but it’s very informative on DMR and GMRS. IMHO, it’s worth the click.

      K3MRI
        • Agree | Support
      • 0 replies
      K3MRI

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    • Cross-Potomac BBQ 2022

      Cross-Potomac BBQ 2022

      K3MRI posted a gallery album in Socials,

      21 August 2022 at Seneca Creek State Park, Gaithersburg, MD.
        • Like | Congratulations
      • 0 replies
      K3MRI

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    • CTR2-Mini

      CTR2-Mini

      KU7Q posted a topic in Self-promotion,

      I call the project I've been working on 'CTR2-Mini', short for 'Control the Radio too - Miniature' and you can read a little about it in this months' QST (Sept. 2022). It's a much simpler take-off of a larger system I built last year called 'CTR2'. That project was published in the Sept/Oct 2021 and Jan/Feb 2022 issues of QEX. CTR2 was a pretty complicated system that allowed you to select up to 16 different radios and control them from a small display or a Node-RED flow. Unfortunately the global supply chain issues killed the project as many of the components I used on it are still unavailable.

      I redesigned CTR2-Mini to be much simpler, easier to build, and a lot cheaper.

      Here's a few photos of the unit.  The first shows the right-hand version. I can supply a left handed enclosure if that works better for you. The second photo is the small Radio I/O interface that connects the Mini to your radio. For size reference those are 1/8" phone jacks and a CAT5 connector on the board. The third photo shows two Minis in a dual enclosure with their Radio I/O units. The last photo shows two Minis operating an FTdx101 in Dual VFO control mode. The Mini on the left is controlling the Main VFO and the one on the right is controlling the the Sub VFO. Only one CAT connection to the radio is required. The Minis can be located anywhere in your shack (I like them just in back of my keyboard) so I can easily change radio settings. The Mini works with many other radios including FlexRadios where you can have one Mini controlling each slice in the radio. Of course the Mini includes a contest keyer too.

      You can read more about the Mini in my blog, https://ctr2.lynovation.com  I also have a YouTube channel, https://youtube.com/lynovation where I demonstrate the various features of the system.

      I can supply PCBs with the SMT components pre-installed for all the boards in this project. I can also supply assembled acrylic stands as shown in the photos. I have project lists on Mouser that allow you order all the through-hole parts and the Wio Terminal to build the project with just a couple of clicks. I can also supply custom built, complete, tested, ready to use systems if you don't want to build your own.

      In addition to the Mini I'm working on a companion antenna switch controller that can control single and dual port antenna switches and an SO2R controller that shares mics, headphones, paddles, function buttons, and a remote PTT switch between two Minis and their radios. The information on those options is also on my blog.

      Let me know if you have any questions,

      73, Lynn, KU7Q
      • 4 replies
      K3MRI

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    • Ham History

      Ham History

      K3MRI posted a record in Key Knowledge,

      First, a listing of interesting Amateur Radio history websites:
      Ham Radio History, A century of Amateur Radio, by W2PA, W1JA, W2SQ: http://w2pa.net/HRH/
      Ham Radio History (from ARRL😞https://www.arrl.org/ham-radio-history
      A history of amateur radio license changes, by Eastern Massachussetts ARRL: https://ema.arrl.org/a-history-of-amateur-radio-license-changes/
      Brief History of the Radio from 1900 to 2022, by Radio4All: https://www.radio4all.org/history-of-the-radio/
      Timeline of Radio, from Wikipedia: https://en.wikipedia.org/wiki/Timeline_of_radio
      History of Amateur Radio, from Wikipedia: https://en.wikipedia.org/wiki/History_of_amateur_radio
      Ham History 3D Visualization
      To see this interactive tool full screen, click here
      In either case, whether below, or on the full page version there are two ways of navigating this visual:
      Use your space bar to activate the timeline and then use your left and right arrows to navigate it, or
      You can also click directly in the yellow bar at the bottom of the tool, and click the arrows with your mouse to advance.
      You can then click anywhere in the yellow bar to advance to that part of the timeline.
      We highly recommend that you view this interactive Ham History visual on a computer or a large tablet, not on a smartphone.
      Note that all images are believed to be without copyright, that all dates are believed to be accurate, and that this tool is regularly updated.

      Comments are welcome.
      • 0 replies
      K3MRI

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      K3MRI,
    • Do you scan?

      Do you scan?

      K3MRI posted a topic in Scanning & Short Wave Listening,

      Who among us also scans? I have not had a personal scanner for years. I used a pro scanner for work for several decades, but my last 'civilian' scanner dates back to the nineties. I have been looking at the Uniden SDS 100 but have not yet committed. I know that @W4DOI was looking at the SDS 200 (the base version of the 100; or is the 100 the mobile version of the 200 🥴?

      Curious how many others actively scan?
      • 7 replies
      K3MRI

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      K3MRI,
    • The KWM-1

      The KWM-1

      K3MRI posted a topic in Nostalgia & History,

      If you owned one, you knew you had something special:

      https://www.collinsradio.org/cca-collins-historical-archives/the-equipment-of-collins-radio/the-grey-boxes/kwm-1/

       
      • 0 replies
      K3MRI

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      K3MRI,
    • Official US writing rules for metric symbols

      Official US writing rules for metric symbols

      K3MRI posted a link in Government Links,

      A benefit of the International System of Units (SI) is that written technical information is effectively communicated, overcoming the variations of language, including spelling and pronunciation. Values of quantities are expressed using Arabic symbols for numbers paired with a unit symbol, often with a prefix symbol that modifies unit magnitude. International SI style and usage publications focus on written communication. Verbal pronunciation of SI terminology is purposefully not addressed in the BIPM SI Brochure (French is the primary language, English is secondary), NIST SP 330 (uses American English spelling), NIST SP 811 (uses American English spelling), or IEEE/ASTM SI 10.

      NIST SP 811 provides an editorial checklist for reviewing manuscripts' conformity with the SI and the basic principles of physical quantities and units.
      • 0 replies
      K3MRI

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      K3MRI,
    • Morse decoder/encoder

      Morse decoder/encoder

      K3MRI posted a topic in Station accessories,

      Okay all, especially @WA2WMR, what do you think?
      https://www.preppcomm.com
      They have two new products. Let's be clear, morse decoders are not new, but this one is! 
      Overall thoughts? Philosophy? How about this one, worth the price?
      • 0 replies
      K3MRI

      Picked By

      K3MRI,
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  • 9 Own old gear?

    1. 1. Do you still own older gear (transceiver, transmitter, receiver, linear amplifier)?


      • Built in the 1980's
      • Built in the 1970's
      • Built in the 1960's
      • Built before 1960
      • Nope, only new stuff

    2. 2. Based on the answer above:


      • I mainly operate with pre-1990 gear
      • I sometimes operate with pre-1990 gear
      • I never operate with pre-1990 gear

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