I ask this as a question - Putting baluns or UN-UN back to back checks that both have the same ratio and can check efficiency if they are transformers such as what is used on beverages. How does this check if it is working well as a balun? As an example, a straight piece of coax with ferrite beads on it could be treated as one or two baluns back to back. But just checking power at the end versus power going in would seem to check the efficiency of the coax but not tell you how much, if any RF was on the outside of the shield. Please correct me if I am all wet.
73, N2TK, Tony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dave G4AON Sent: Saturday, October 07, 2006 2:54 AM To: [email protected] Subject: Re: [Elecraft] Baluns & wires & feeders (oh, my!) There is a simple way to measure the efficiency of a balun, make two of them and connect them "back to back". Measure the power fed to them and the corresponding output power. Obviously this doesn't take a mismatched antenna into account. _______________________________________________ Elecraft mailing list Post to: [email protected] 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: [email protected] 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
