Power capacity of SMALL VHF/UHF magmount
 

You've all seen those tiny VHF/UHF magmounts at hamfests...usually black,
and
resemble a cellular antenna?? The magnet is about the diameter of a quarter
(never fell off though!!)
They are complete with thin RG174 coax.
Any idea what the power handling capacity of these jobs are??
Would a 50 watt rig melt it?
How 'bout 35?
Just curious...before I smoke test it!!
Thanks for your thoughts
....Dave