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I really don't know. I just didn't seem to be getting a signal back through the coax for some reason. My RigExpert AA-600 did OK in measuring the SWR on the same coax and antennas, though. This was

I'd propose the lack of ability to measure SWR is not due to the long coax, but due to strong local sources of RF. Dave - W?LEV -- *Dave -

I think we should all consider that the Discone is actually and improved version of rhe Biconical dipole and not the other way around.

Measure it BOTH times. First to make sure the antenna is properly tuned while it is still easy to work on. Second on the tower to make sure the coax fittings and the coax line are good.Kent WA5VJB

I generally measure it at the end of the coax in the shack. That way I see what the rig is going to see. I have had really long stretches of coax to the antenna and the NanoVNA was unable to measure

Peter, It depends what you want. Measuring at the antenna allows you to check the resonant frequency and the complex impedance of the antenna (to design a match to the coax impedance - often 50 ohms)

Hello, Once my antenna is up it will have a 50ft run of coax that enters my home. Do I measure the swr at the base of the antenna (before the 50ft of coax) or inside the house (at the end of the

Thanks for all the great advise. I really appreciate it. I'm still in the process of ordering everthing I need to install my antenna. It involves drilling holes in exterior wall, installing interior

If you are connected to a pc I put a clamp on ferrite on the usb cable. Also have to be careful if you are holding the vna as you become part of the antenna. I made a large metal ground plane fixture

I did some more experiments last weekend. I manufactured a disc and tested the antenna with a traditional disc(one) configuration by changing the top part, tested a piled version against different

Yes, these are the internal reference limits, only relevant when you measure against the internal reference For phase noise measurements you should always use an external reference -- NanoVNA Wiki:

Excellent, thanks. This quote in the document, refers to the internal reference limits? The phase noise of the internal reference (TCXO) is limited but eliminated when using an external reference

Hi Sam, The latest Version 1.1.215 from DiSlord, dated 29-May-2023, works fine on my Windows 10 installation. You should be able to find it here:

Is there a version of the NanoVNA App available for Windows 10? When I try to install the version that I have Win10 complains in a big blue banner "This App can't be run your PC". I have tried

Is there a version of the NanoVNA App available for Windows 10? When I try to install the version that I have Win10 complains in a big blue banner "This App can't be run your PC". I have tried

See the slide on measuring phase noise almost at the end of this presentation https://www.rfseminar.nl/cms/wp-content/uploads/2023/04/tinyPFA_RF_Seminar.pdf -- NanoVNA Wiki:

If you take a VCO under test and phase lock it to an appropriate XO and use that XO to input to the PFA. Can you obtain close in PN as well via the Allen variance close in and then from a time jitter

It depends on the accuracy you need For 1e-13 accuracy the two input frequencies (could be harmonics) have to be within 0.5 Hz of each other. If 1e-10 is sufficient accuracy you can first calibrate

I have a NanoVNA-F and went through the calibration process and then was measuring a few of my HT antennas to get comfortable with the VNA. I noticed very different readings if I held the VNA with two

Not if the transformer has continuity between inner and outer conductors, but it only takes a second, cultivates a good habit and will do no harm. 73, Don N2VGU