Nope: The 1/4 wave line transforms the high impedance to a low one and the SWR meter reads low. It's called a transmission line transformer and is very common. It's the reason everyone is having trouble understanding why SWR meters read differently. The ONLY way to compare them is to swap them with each other. Putting them in series fouls up the readings for both meters. Steve N4LQ [email protected] ----- Original Message ----- From: "Kok Chen" <[email protected]> To: "Elecraft Reflector" <[email protected]> Cc: "Steve Ellington" <[email protected]> Sent: Wednesday, November 04, 2009 7:55 PM Subject: Re: [Elecraft] K3 SWR Accuracy - reprise
> > On Nov 4, 2009, at 4:41 PM, Steve Ellington wrote: > >> 4. Example: A full wave dipole center fed with 50 ohm coax. SWR reads >> infinite at the antenna but with 1/4 wavelenth of coax, SWR reads low! > > Nope -- the *impedance* at the end of a 1/4 wave transmission line > when it is looking at a very large impedance, is close to zero, > therefore the SWR remains close to infinite. The SWR definitely won't > read low unless there is something wrong with the instrument. > > 73 > Chen, W7AY > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.698 / Virus Database: 270.14.50/2481 - Release Date: 11/04/09 14:51:00 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
