[TowerTalk] Mains Filter for 80M

[Wayne Willenberg]

I am putting up an 80M dipole at 65 ft and a Beverage antenna for
receiving.  In doing my homework for this project, I have been reading
ON4UN's book "Low-Band DXing."

On page 7-75, the author states "It is essential to feed the equipment at
the shack through high-quality mains filters..."

Would someone please give me a recommendation for such a "mains filter"?

Thank you.