Start with 1 Watt, then go with 2 Watts, etc. If you die, back down
a Watt (hi).
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On 1/30/20 9:24 AM, John - KK4ITX via
I use the MFJ-9232 QRP Pocket Loop tuner and find
it a useful setup to eliminate the local noise. There are
several YouTube videos showing good results but beware......
they were made when there were sun spots. I had great fun
rigging up the expansion arrangement to allow for various
lengths of wire. To get a broader bandwidth I used trailer
hookup wire, seems to work better than the wire that came with
The supports are driveway markers and I really
lucked out at a Flea Market with the $4.00 heavy duty tri-pod.
I have attached a picture of the assembled unit if anyone is
interested I have more and some additional hints and details to
As for use with a pacemaker ? You will know if it
is bothering you or anyone else I believe. When I tune up I am
listening (RX) or using my Sark 100 so there’s no large amount
of RF present....... Operating (TX) one would be several feet
away so at 5w I doubt that you would be affected but just go at
it slow (1-2w) and see what happens.
On Jan 29, 2020, at 22:18, Dan Reynolds <on30ng@...
I have access to some hardline and I'm thinking
about making a transmitting loop. I know there was a design
out there that used an Arudino to tune the loop at frequency
Anybody have some decent designs - I do not want to design
it myself. I'm not too proud to borrow someone else's work.
Also, does anyone know about any problems with a
transmitting mag loop and a pacemaker (QRP levels only).
Dan Reynolds -- KB9JLO