The caps for loops. Now I am reaching to something that I did not pay enough attention to so may be way off base, or maybe I just had a dream that I slightly remembered. Isnot there a thing that is easily made out of tubing called a trombone capacitor? I think that a small step motor can adjust it, and, it takes high voltages? Is this so and can it be used here. Chris opr VE7HCB