[Elecraft] APF howl

[Ken Chandler]

Hi
I cannot use my APF due to a loud howl, it's sounds like a gale blowing through a pipe.
It's impossible to copy weak signals in the Ukrainian dx contest.
I've make a short video of it on my iPhone if anyone wants to hear it.
I'm just wondering if I have anything else set which is interacting with it!!
The clicks I found also but it's not related as it was present in 4.17.

Ken..G0ORH 

CW4EVER

Sent from my iPhone