Matt You could consider making a 5 dB pad that also matchs from 50 to 75 ohms. 5 dB would not sacrifice too much sensitivity, and it would be very broadband, being nothing but three resisters. Good luck and 73 Bob N6WG
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Matt Osborn Sent: Sunday, October 09, 2005 7:43 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Poor Man's Spectrum Analyzer The Poor Man's Spectrum Analyzer I'm building uses a varacter driven cable tuner as its front end. The cable tuner has an input impedance of 75 ohms. Most instruments have 50 ohm input impedance and my usage will be primarily with 50 ohm devices. Maybe it isn't worth worrying about, but I'm looking for a convenient way to convert from 75 ohm to 50 ohm input impedance. I've seen some writeups on building a 50 ohm to 75 ohm broadband unun, but the articles were incomplete (or my knowledge level is too low to recognize a complete article). The analyzer covers 5MHzto 500MHz. Does anybody have any advice? Leave it alone, build an unun, buy an unun, any other options? _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
