"Al" wrote in
:

Is there a nominal impedance or approximate impedance for a loop
antenna? For example, a dipole is considered 72-ohm, a bevarage
450-ohm. What is a nominal loops Z?

I have a 4-1/2 foot diameter loop antenna with 12 turns paralled by a
capacitor for the antenna and one additional turn for the pickup coil.
The loop is for the 200 - 500kHz band. About how much is the impedance
of such an antenna? Thanks.

Al,

What is a nominal loop?

Though there will no doubt be some instant answers to your question, the
information you have provided does not allow calculation, anything else
is a guess.

The impedance (if you need to know it) is probably easiest found by
measurement, and it will probably vary with frequency even though you
resonate it at each frequency (assuming the capacitor you describe is
variable).

Owen