I need several matching R.F. pi-type chokes, 1 mh at about 500 ma. for my 30K-1 restoration. I believe that they have four separate layers or pi's. and are about 4 inches high approx. Anyone know where I should go to find them? Thank you. > Dave, W3ST > Secretary to the Collins Radio Association > Publisher of the Collins Journal > www.collinsra.com >