- HF Magnetic Loop and Pacemaker
Re: HF Magnetic Loop and Pacemaker
John - KK4ITX
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Here’s a photo of a spreadsheet that I made up last October for making the QST Loop.
On Jan 31, 2020, at 13:02, John - KK4ITX via Groups.Io <jleahy00@...
So far I have only put it through the receiving paces. As far as I know the only time any appreciable RF would be present is when transmitting. You coarse and then fine tune by ear, not by keying up and transmitting. I only use the analyzer for checking as my hearing is very directional.
I took it out yesterday afternoon for an hour or so at a RF quiet park and was quite pleased with the reception.
MFJ has details and a video to explain how it works on their website. Also QST had an article a couple of months ago dealing with making a neat loop using 450 ladder line...... you might give that a read. I plan to try it also.
On Jan 31, 2020, at 11:30, Dan Reynolds <on30ng@...
On Thu, Jan 30, 2020 at 09:24 AM, John - KK4ITX wrote:
MFJ-9232 QRP Pocket Loop tuner
That's pretty interesting - have you had good luck with it? And yes, I would have to tune it with an analyzer - LOL. No way I'd want to be close enough to touch those knobs with real RF going through it. I'll bet it would work well with a loop made of hard line. Heck I could make one for each band almost.
Now an arduino controlling that would be pretty darn cool.
Dan Reynolds -- KB9JLO
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