You are correct Carl, I should have inserted the URL's. My excuse, and it is pretty flimsy, is that I was drafting the reply on my iPad2 which is a bit harder to go off and get links on than my laptop [now being used].
The link to my web site is: http://www.k0to.us/HAM/ham.htm The articles are "How to estimate RF Choke impedance" and "July 24 - RF Choke measurements" K9YC's article is: A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing .... The Cookbook pages are 35 and 36. There is substantial other material worth checking on, but those two pages give information that can be used to go off and buy parts and build. The URL for his article is: www.audiosystemsgroup.com/RFI-Ham.pdf Tod, K0TO -----Original Message----- From: ZR [mailto:z...@jeremy.mv.com] Sent: Thursday, December 15, 2011 9:04 AM To: Tod - ID; Martin Cc: topband@contesting.com Subject: Re: Topband: T-200 vs. T-300 Some links to that info might help. Carl KM1H _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK