Open Loop aka Dipole bent into a square
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The MFJ tuners are ok as long as you don't abuse them..
And on some , you probably should take the power ratings
with a small bit of salt depending on the load you are matching.
I've got a small MFJ random wire tuner that I've had since 1977.
It still works, and I often use it as a mobile matcher. Also
handy as a "line flattener" when running coax to a solid
state rig.
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I picked up a used MFJ tuner at a local ham swap meet. As is my wont, I
took off the cover to give it the visual once-over before dumping any 'trons
into it. Good thing. About six mounting and/or connection points - screws
or nut/bolt combos -- were so loose as to guarantee problems.
It's anybody's guess how long that stuff needed tightening. Was it ever
tight? (hint-hint)
"Sal"
PS: The thing works pretty good, overall.
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