I am using screw-on telescopic antennas for my doppler rig.

These have four dimples at the base securing the tube to the base.

After a while, the tube comes loose from the base and the antenna will
no longer screw off or on because the tube turns freely about the
base.

I have tried using a pointed punch to increase the dimples, to no
avail.

They are $5 apiece from Mouser, so if possible, I would like to
salvage them. I seem to get around eight on-off cycles per antenna. I
am tightenting them only by hand.

It is possible that some of the loosening is cause by the bending
force of the 55 mph wind on a 19" whip.

Any suggestions?

Ken KC2JDY