A short at DC isn't necessarily a short at AC.. charging a capacitor
or energizing an inductor causes an impedance at AC. When the fields
are being built up and collapsing (electrostatic in the case of
capacitors and electromagnetic in the case of inductors) an impedance
is created. Impedance is to AC as resistance is to DC.

-SSB

SNA wrote:

I have a question which I need to ask. This may sound stupid but I just
don't understand. I have a cb base antenna that is a "DC Grounded " antenna.
When I hook up a ohm meter to it at the coax end ...it shows a direct short.
The swr on the antenna is excellent.....so how can this be?
Any help will be appreciated