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In addition, the newly released NanoVNA-H reduced the RG174 cable from 30cm to 20cm to reduce the loss. If I make a VNA with a frequency higher than 1GHz, I will use the RG316 cable. On large VNAs in

Hi, Thanks for the answer, I didn't expect to get a lab weighing station :-) Only a few days that see, the duality on the cable labeled it. Its mechanical size is closer to 1.5C-2V. One question for

Hi, The reading results are similar between RF Vector Impedance Network Analyzer N1201SA and the nanoVNA/nanoVNAv1.03b4.1 during Mobile Antenna SWR testing. The length of the RG-58 coaxial cable of

Yes, some manufacturers also provide 75 ohm RG174 cable. The RG174 cable provided by NanoVNA-H is 50 ohm. I have checked the parameters of RG174 and RG316 cables. They are not ideal at 1 GHz.

You cannot believe marking, this is just some noname cable with any marking on it :) The cable that I got with NanoVNA is marked just as "RG174 ROHS". But it has some high mismatch, because I measure

If you measure Z11 using S11 then the Q is given by fc/ BW where BW is taken between |Z|/Sqrt(2) points on your frequency plot. Or alternatively taken between +/- 45 degrees on the phase plot.

You're right in order to compare S11, there is need to perform OSL through cable. See measurement in attachment. Now rg174 looks almost the same, but still has worse performance. :)

Hugen, if you don't believe the caption, then it's really 50 Ohm from another manufacturer, but for Chinese it's 75 Ohm. See CABLE & WIRE.pdf at https://oyaide.com/catalog/products/p-534.html or

You should calibrate at the end of the cable and the difference in the picture measurements you show is caused by the cable length, not the cable quality.

https://www.pasternack.com/images/ProductPDF/RG174A-U.pdf

Hello I also got the nano with a RG174 cable, which according to the label and the datasheets is 75 ohms. Thus, 75 Ohm and 50 Ohm cables are compared. Oooops

measurements for rg174 and rg405

That's Wrong. You cannot cancel bad cable effect with calibration. You can only reduce it for a little. For example, here is calibration+measurement performed with rg174 32 cm (which come with

I have noticed the feedback that the newly sent NanoVNA-H sma F-F terminal will be replaced with tetrafluoroethylene. hugen

[email protected]> wrote: Em, enough said, I initially thought that the melted stuff was hot-melt glue. That might have worked better as a dielectric! -- Dr. David Kirkby, Kirkby Microwave Ltd,

Yes there is a Facebook Group “NanoVNA” but be careful you could be blocked or band without warning lol. I really have to just laugh at these admins. Acting like kids. I guess they are affiliated

A photo of the dissected barrel connector is at: /g/nanovna-users/album?id=96185 --John Gord

Which basically results in the same conclusion that the adapter is only fit for bin. ?????? -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...

I have not extensively tested the cables supplied with my NanoVNAs, but giving *one* cable 20 seconds to relax after bending, shows the reflected signal not changing any more than -35 dB up to 1.5

Some people reporting that they have measurement issues at low frequency with white "lizard" version. Also, it seems that Chinese manufacturers prepare firmware to support low quality element by