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Alan, I don't understand what you're suggesting. If I wanted to find center frequency and Q, I'd just look at the rectangular plot, which is available. Brian

Thank you.

A useful addition to your bag is a constant Q contour. The Q = 1 contour permits resonator unloaded Q to be determined from S11 or S21 data overlaid on the chart. Three dB bandwidth and center

Hi Roger Apologies for resurrecting an old post I was just wondering if you could provide any details on the S11 / S21 test jig, it looks pretty much ideal for the matching tests I would like to try.

Nizar, The renormalization makes some assumptions that may not apply to your balun, in particular that S11=S22. This is often close to true for things like ceramic filters, but is probably not close

More Smith chart tricks: https://k6sti.neocities.org/splot.htm Brian

Hi Dave as asked here below the attached new measurements with renormalized Z0 coax 78.5 Ohm and 50 Ohm ( first balun Zc= 62 Ohm) , cursor at the same frequency 14.125Mhz . 73's Nizar .

Hi Dave Thanks I do not use any external artifact to take S21 Losses measurements with equivalent 78.5 Ohm coax Z0 , i just use the DiSlord Z0 renormalisation option on Display menu, this option take

According to the Github page it is the latest "Official" release, Feb 24 2025 . I just d/l it last week. Don't know about older units. I have a Deepelec V3 and seems to be fine

Instead of reading where the plot intersects, read the numbers at the top of the screen which is where your cursor is placed. You have: -0.774 dB loss at 54.6 + j 35.2 ohms equivalent of 64 ohms for

Hi All i tryed to change the balun designe with the same FT140-43 but with 1X12 turns this time , I measure the charateristic impedance of the balun is around 142 Ohm ( see Smith shart focused on the

Hi Dave Thanks Pse take a look to the graphic curve , the losses difference is huge over all the band from 50Khz to 30Mhz , marker value not so important here . 73's Nizar

Please compare at the same frequency. Your 50-ohm (actually 52-ohm) measurement is at 27.7 MHz. Your 72-ohm measurement is at 14.2 MHz. Please repeat at the same frequency and get back with us. Dave -

Hi I am a little confused, my 1/1 balun done with FT140-43 2x10 turns with 1mm wire as illustrated by photo attached, i want to measure losses by S21 Logmag function after a good thru calibration,

Hi here my best adjustement to the balun around FT140_43, Zc = 62 Ohm , (SWR=1.25:1 with 78 ohm coaxial cable) . the impedance is centered to the Smith shart and focused there with a resistance trimer

Is nanovna saver version V0.7.3 the latest? Is it backward compatible to all (older) nanovna hardware/firmware and all the various forms of the nanovna implementations? Understand that some features

Hi It helps me to adjust gaps between 1/1 current balun wires to have a Zc = 48.5 Ohm (initially wires are colled together gives 39 Ohm characteristic impedance of twean lead of balun ) . amazing

Hi It will be very appréciated if we can save display smoothing setting to the C0 , C1... C6 calibration memory. If we can display batterie voltage with a very small police characters below batterie

Hi Graphic image option of H4+DiSlord firmware 1.2.40 done by the Nano_App 1.1.218 is a really amasing option, it make bigger the Nano VNA screen with larger PC screen and mouse option running

I don't plan on putting one up. I do not see it as the best antenna to use. People say they have worked a lot of stations with it, but others have said they worked people using a gutter or bedspring