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For more information about radio frequency and other accessory probes that you can make (or sometimes buy) and how to use them, see the page on multimeters. ------------------------------------------------------------------------------------------------------------------- Disclaimer: The content of this website and blog has been created and posted here solely for the purposes of reading interest by Rob's Radio-Active, LLC. The content is the thoughts of the author and is not intended to be an authoritative guide. There may be errors and omissions. Electronic and electrical devices pose a potential hazard to life and property if improperly handled, used, or serviced. The author cannot possibly think of, and warn of, all the ways one can get into trouble with electricity, and recommends one learn all of the technical and safety aspects of electrical/electronics before attempting to work with or use any of it. There are hazardous voltages and currents involved in almost all electrical and electronic equipment—especially vacuum tube devices or anything that plugs into mains current for operation. Furthermore, vintage equipment was never designed or built to be up the safety standards of modern times. ------------------------------------------------------------------------------------------------------------------- eBay or Amazon are good sources of sensitive germanium diodes for this project. A 1N270, 1N34A or 1N60P are all good choices, with the 1N270 having the highest reverse voltage tolerance. A shottky diode will work, too, but is not quite as sensitive. A shottky diode, however can easily be found at major electronics parts suppliers. A fast switching silicon diode like a 1N4148 will work, but is the least sensitive of them all. This may not matter for your purposes, but for reading (at least the presence, if not accurate amplitude) of RF at a few or a few tens of millivolts RMS, germanium is tops. This is to be installed inside an insulated and preferably ground shielded housing and connected through a shielded coaxial cable...But the main reason for this short page is to post a tested layout and circuit board that may be etched if desired, not to rehash everything about RF probes or their use. © 2016 Rob's Radio-Active, LLC All Rights Reserved 
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