>How much capacitance did it take to resonate the loop at >136kc? I assume your loop is about 100uh. Mike, Fo = 1/(2pi sq rt LC) so C = 1/(L(2pi F)^2). _________________________________________________________________ FREE pop-up blocking with the new MSN Toolbar � get it now! http://clk.atdmt.com/AVE/go/onm00200415ave/direct/01/