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Barry, Can't thank you enough. You did an excellent job putting this together.... finally, something I can understand. 73 Gerry N0DOZ in AZ

Good information in this thread.? But you might want to think about how badly you want to correct the SWR of 1.5 introduced by the 75 ohm line.? You can calculate the improvement you can achieve,

Maybe of interest: https://www.kn5l.net/kn5lEfhwUnun/

Hi Brian . have a look in the FILES section , /g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA Jon - g0myw

There's a helpful presentation here: /g/nanovna-users/message/22977 73, David GM8ARV -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email:

Brent.. I cant find a beginners guide on how to use the vna for ham radio here .. Can you assist me on where i can find it .. Thanks , Brian

See more info on the 50/75 transformer on the site of my friend ON6GD https://www.xtgaby.com/post/50-to-75-ohm-transformer-for-receiving-systems

I take it back... Nothing magic about bifilar. Best is a soldered tap to the desired wire. Next best is a twisted wire loop tap. Third best is bifilar and worst is two separate windings. This assumes

Hi Fred, I appreciate the feedback. I will eventually post a link on some other forums. I don't happen to have any mix 52 in my collection or I would have tested it. Looking at its complex

JMR, Indeed I was using the two port S11, S21 provided by the nanoVNA. If you go through the Appendix in my post you can see how I generated the loss plots I presented. Once I established a calibrated

Pete, I've modeled with 4NEC2 an end-fed wire with various source impedances and counterpoise lengths. The 2450 ohm source impedance seems close to optimum. You have to choose some step-up ratio. Once

Welcome to the forum, Brent. There are several guides in the files section, including the Absolute Beginners Guide.? Go through the forum's Wiki for additional information. There are also many

I think that is one of the reasons the transformer should ideally be measured as a full 2 port device using a full two port VNA. This can also be done with a TR VNA like the nanovna with a little

Interesting article, thanks! I think the best way to measure/model the transformer is to take a proper full two port model using the nanovna. This is a bit fiddly to do with a TR VNA but worth the

I just noticed a getting started guide under the files section. Reading thru it now.

Hello. I just received my H4 and I'm finding it difficult to understand the main website and getting this device to function properly. I'm try to just start with something basic like SWR over 30-40

Gary Have you considered what the feed point impedance of an EFHW is against the equivalent source impedance the 1:49 transformer has created? Is there a reasonable conjugate match? I have measured

Hello, I regularly use the Zplots.xls https://ac6la.com/zplots1.html Download: https://ac6la.com/Zplots.zip , I have used it a lot with my antenna analyser SARK100, it is very versatile and useful,

Hi Dave, Yes, the winding is tapped as an autotransformer and not a bifilar separate primary. I didn't think it would make much difference. But after seeing a couple of comments, I measured things

Got it. ??? Mikek -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus