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Re: Handheld QMX?


 

Go down 7 photos here, Wes working his Micro-mountaineer is the small black and white photo to the right:
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His QST article describing the Micro-mountaineer starts on page 11:
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Built it shortly after that was published in 1973.
Laid out and etched my own board with ferric cloride.
A step up from them Pixie thingies on ebay today.
Lots of plans for it, but made perhaps 2 contacts.
Climbed Mt Hood, but didn't bother taking the Micro-mountaineer.
It's in a box somewhere down in the basement.
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Also in that issue:? the WB4VVF Accu-Keyer.
Built that too, I think it's down there in the same box.
After 40 years as a digital design engineer I took another look
at the schematic, still can't figure out how all of it works.
A very elegant design, but uses some nasty tricks.
Set the standard for decades to come on how a keyer should behave.
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Another article in that issue was the third installment of W2DU's
"Another Look at Reflections".? That I did figure out a few years ago
but it was some very tough sledding.? He had some nice insights?
into how transmission lines work, but no idea how to write.
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I just bought some AT42QT1011's so I can add M0UKD's touch keyer to my QMX
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Jerry, KE7ER
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On Fri, Feb 21, 2025 at 07:04 PM, Curt wb8yyy wrote:

Many years ago W7ZOI is pictured with a handheld cw rig. Key is attached, maybe battery in his pocket and a wire antenna is deployed into a tree. Certainly qmx can do this with a suitable key. I may have seen something pictured here recently.?
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Curt

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