Hi Peter, For some ancient insight into the situation you might take a look at my webpage: http://wc6w.50webs.com/wc6wamps/index.html?fr62.html Click on the link at the top of the 2nd paragraph Enjoy! 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ -- Peter Chadwick wrote: Roy said: >Solenoid plate chokes fortunately do not 'live by inductive reactance alone' and are usually referenced at a much lower frequency than Fo.< I figure that when you get down to 3.5MHz that probably isn't the case. I'm a bit tied up for the next week or so, but when I have time, I'll do a plot of R + jX (actually G + jB) against frequency for the solenoid choke that I have - mounted in a PA,. too. 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps ________________________________________________________________________ Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value to sign up today!