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Hi I think a 12Khz IF offset should be kept at default value and forget it , it gives the optimal Harmonic ratio filtering with the RC 1sft ordre low pass filter in the Hardware of nanovna 73's Nizar

I am learning about RF and antennas and I want to understand how do I figure out how much the IF offset is, in NanoVNA-H4. I could not find any article explaining how to check if the default IF OFFSET

I first used a VNA when I was in Engineering within a National Broadcasting Network (CBC) and we used it for optimizing our transmitters and antenna systems. As a Young engineer it was an eye opener

Hi All, In the post title it says "what am I missing ?". Well, I now know what I missed - tapping the "Done" key when calibrating ! I am so used to calibrating my DG8SAQ and Sark 110 VNA's that I

YouTube is your best friend! Matthew KD6KVH

It is a very powerful and useful device despite its size and cost. I have used mine for many purposes including using the TDR function recently to troubleshoot a feed line/antenna problem of a local

I got my first Nano VNA yesterday, a friend who used to live 10 miles away, now lives 1000 miles away bought it for me along with jumpers and adapters. Today I set up "presets" for 80, 40, 20, and 2

QUOTE: You will do far better to connect the right most antenna and collapse it *** Because the other two antennas shown in the image will not work well if at all on 433 MHz. The extendable

Hi What Smith measurements given with the reference load, the short circuit and open terminaison ??? It can help to better understand what can be the issue 73s Nizar

Hi Donald, Thanks for that, it was pretty much what I was expecting, and ties in with what I am getting with my DG8SAQ VNA. I am also using a silver mica capacitor with about the same lead lengths.

Hi Stewart, Out of grins and giggles I took a 470 pF silver mica cap which actually measured 454pf using smart tweezers. I then just used a test jig with my NanoVNA which was a white plug in

Uhm, right. This is over my head... I was looking to find another impedance measurements for the said antenna, so I can check my measurements against. It looks to me unlikely to obtain such, so how

it depends ... what about a vertical 2x 5/8 wave ?? also with a loading coil at centre but with some gain over a quarterwave ... and cause its endfed it may be halfwave on 2m and 2x 5/8 on 70cm as

I get accurate results when measuring capacitors with my NanoVNA so I assume it is something with your setup or calibration. Without photos or screenshots we don't have much to work with here. Here is

Hi Jeff, Yes, you are right about the strays of the test jig, and about the capacitor lead length. However, I am using the same test jig and capacitor that, although not perfect gives milli ohms

Hi Stewart Even at 7MHz it is unlikely that you will not be seeing some stray inductance and stray capacitance, so I am more surprised, at the 0 -j50 ohms. Unless your test jig is very good and the

Indeed 442 pF at 7.2 MHz, that's 0-j50 ohms No need for software to calculate that. Z=1/Cw where w=2*pi*F C in Farad F in Hz pi 3.14 If with your NanoVNA you read: 11 ohms -j49 ohms, it's probably

Hi, I am trying to get to grips why I am not getting the same Smith Chart results with my NanoVNA as I am with my DG8SAQ VNA. I have got to the stage of trying to make everything as simple as

Hit send too quick. The way these work is the bottom 1/4 wave has a high Z at the top. The coiled section moves that up, and ideally is a 1/2 or 1 wavelength that does not radiate, then you drive the

Not necessarily - depending on the lengths. What you might wind up with is essentially a colinear array, with either a dipole stacked over a monopole or dipole stacked over a dipole, and that coil in