helmsman wrote:

What is the easiest way to quiet a random length indoor-outdoor, vertical-horizontal
antenna down.

TIA


Make sure you have a good impedence match to your receiver, make sure
you have a good solid outdoor ground from said receiver, and try to find
out by process of elimination what in or around your home is generating
extraneous noise - shut if off while listening, if that's feasable.

All of that may/might help some, but not as much as you are hoping for.
Longwire antennas will inherently pick up noise, period. Loops are much
quieter, but overall don't have the same signal pulling ability.

Tony