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If you want to take a screenshot of the graph in Saver right click it and then Save it. If you want a screenshot of the NanoVNA press the "Manage" button and select Screenshot. Roger

Steve, Yes you can do the calculations to find the through power to the antenna with the aid of a NanoVNA. Some things to consider. - Some transmitters will automatically slowly reduce their Tx power

Those ferrites in power supplies are not iron core. The only place I've seen iron core chokes are in HF communications equipment. Mike n2MS

Powdered iron cores are all color coded. In general, ferrite material is not color coded, although some suppliers may. Dave - W?LEV

Using short coaxial cables with alligator clips on the end for S11 and S21 can easily lead to erroneous results. At best it is only useful for measurements in the HF range. There are several reasons

Bryan, Those power supply ferrites are useful for low frequency power or choke applications but are not that useful for HF balun, unun or transformer applications. The unknown ferrites I find useful

The nanovna is a great tool to measure this; really what it can measure is the loss in your feed cable and the fraction of reflected power from the antenna feedpoint. An easy way to measure the cable

Much obliged Thanks Steve

you can measure your antenna ... (swr) and you can measure cable loss (s21) then you can do some math to see what your antenna gets from your trx (and what is your receiver getting on the rx side)

Is it possible to measure the actual power getting to the antenna with H4 model? I can't seem to find any documentation on this. Power is 4 watts. Thanks Steve KE8VHY

Thanks all. I just wasnt sure, for a thru cal where to place the Open Short and Load bits. Its pretty straight forward for using just S11 for reflected measurements. Mike that's a great idea for

I use PrintScreen but SnagIt is another good tool. They allow you to select the area that you want to print.On this topic, is there a way to copy and print the whole thread for a topic? This would be

Hello Nanovna user group. I have subscribed to this group and have followed many great issues onto resolution. Allow me to introduce myself, my name is Larry Land (Ki5oez), VP of the McKinney, Texas,

Sorry folks, I’ve got no explanation for the butcher job my cut and paste formulas on Gamma, rho, and angle turned out to be. The bits were from the attached article, link below.

Correct. For thru the cables are connected together. For isolation I connect a 50 ohm load is to each cable. Mike N2MS

For the S11 calibration (Open, Short, Load), it does not matter whether there is a cable attached to the second port or not. For the Isolation and Thru calibration, the cables should be attached to

Bryan, Yes. I use it to check the characteristics of my ferrites. In addition, I have different sizes of Fair-Rite 31 43 and 61 cores so I can compare the unknown cores to the Fair-Rite products. Mike

Assuming you are running on Windows, you can a) select the window you want to share, b) press ALT-PrintScreen on your keyboard. This will put a copy of the window on your windows clipboard, so you can

Hi Mike. Thanks for the reply. Just to be clear, you calibrate at the end of the S11 cable (with both cables in place). Then you connect them together for the through part of calibration. Regards.

I perform a calibration with the cables in place. I have a S11 cable with two alligator clips, input and ground and a S21 cable with one input alligator clip The S11 clips are separated for the open