Re: Traces refresh rate slows down with fw 1.0.69
#nanovna-h4
Many thanks Tim!
By
Gooser5000
·
#28661
·
|
Re: nanovna-saver/displayed charts/S11 R/¦Ø & X/¦Ø (?? / Hz)
"What I don't understand is the graph that is identified by S11 R/¦¸ & X/¦¸" This is a plot of the pure resistance and the reactance, both expressed in Ohms. Of course, pure resistance is expressed in
By
W0LEV
·
#28660
·
|
Re: Traces refresh rate slows down with fw 1.0.69
#nanovna-h4
https://github.com/DiSlord/NanoVNA-D/releases -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
By
Tim Dawson
·
#28659
·
|
Re: Traces refresh rate slows down with fw 1.0.69
#nanovna-h4
Hi TIm, thank's a lot for your response. No, I didn't try the 1.2.00 build. The 1.0.69 was the most recent firmware, I found in the files section of this group. Could you please provide a link, where
By
Gooser5000
·
#28658
·
|
Re: Traces refresh rate slows down with fw 1.0.69
#nanovna-h4
I have to wonder why you have loaded such an old version . . . 1.2.00 is the current build. Have you tried that yet?
By
Tim Dawson
·
#28657
·
|
Re: nanovna-saver/displayed charts/S11 R/¦Ø & X/¦Ø (?? / Hz)
Thank you Dave - W?lev Everything you explain, I understood and I even established all the equations that pere down to find from S22 each value displayed in the data of the markers. What I don't
By
F1AMM <18471@...>
·
#28656
·
|
Re: Measuring AL value via NanoVNA
#coils
#transformer
Dear Dave, many thanks for perfect explanation ?now it makes perfect sense for me, you explained it very well. I will watch videos you have included. I was more oriented to Amidon materials but
By
Tomas - OM5AST
·
#28655
·
|
Traces refresh rate slows down with fw 1.0.69
#nanovna-h4
Hi there, I'm new to NanoVNA and I hope, I do not ask stupid questions, please excuse me, if this is the case. I got my NanoVNA H4 last week and played around with it since that time. Today I
By
Gooser5000
·
#28654
·
|
Re: Measuring AL value via NanoVNA
#coils
#transformer
Dear OM, I'm interested about various measurements with NanoVNA but now I'm fighting with some fundamental questions not related only to nano VNA. but still unable to find answers, even after reading
By
W0LEV
·
#28653
·
|
Re: nanovna-saver/displayed charts/S11 R/¦Ø & X/¦Ø (?? / Hz)
To understand what the plots represent, you must understand what the representation of impedance implies. The variables involved are: 1) Pure Resistance represented by "R" 2) Reactance represented by
By
W0LEV
·
#28652
·
|
Measuring AL value via NanoVNA
#coils
#transformer
Dear OM, I'm interested about various measurements with NanoVNA but now I'm fighting with some fundamental questions not related only to nano VNA. but still unable to find answers, even after reading
By
Tomas - OM5AST
·
#28651
·
|
Re: nanovna-saver/displayed charts/S11 R/¦Ø & X/¦Ø (?? / Hz)
My question of F4HTQ having remained unanswered, I appeal to you again. Question 1 ---------- I do not understand one of the graphs of Nanovna-Saver: S11 R/¦Ø & X/¦Ø I don't understand what it wants
By
F1AMM <18471@...>
·
#28649
·
|
Re: Using a nanoVNA as a passive receiver
57 filters between 3kHz and 600kHz -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK
By
Erik Kaashoek
·
#28648
·
|
Re: Perfect SWR with dummy load, but huge with antenna
That was my first thought when i have seen your first post.... Antenna is rp-sma .... You also should by some extenders (male female sma).... Sma socket may wear out after extensive usage... And its
By
Siegfried Jackstien
·
#28647
·
|
Re: Perfect SWR with dummy load, but huge with antenna
Thanks, but you were too quick to dismiss the human factor.. It wasn't until this morning that I realised the antenna is rp-sma female and the nanovna is sma female.. They will screw in perfectly, yet
By
Lucian
·
#28646
·
|
Re: Perfect SWR with dummy load, but huge with antenna
Willing to bet you have a strong, or many, interfering signals in the passband. Point your test antenna straight upward and see if anything changes. However, if you have additional strong signals in
By
W0LEV
·
#28645
·
|
Perfect SWR with dummy load, but huge with antenna
Hi, Just bought a Nanovna-h (0.4.5-4-g96e7efe firmware) and calibrated it, tuned the display to only show the SWR, however while I am getting a perfect SWR of 1 with the dummy load, I get a SWR in the
By
Lucian
·
#28644
·
|
Re: How to measure induced coupling RF between two antennas
#measurement
#nanovna-h4
One seldom achieves the "advertised" or modeled pattern, especially at HF frequencies. VHF, UHF, and ?waves are whole different stories. HF patterns rarely conform to expected results except for
By
W0LEV
·
#28643
·
|
Re: How to measure induced coupling RF between two antennas
#measurement
#nanovna-h4
Did a coupling test between two antennas and it was interesting to see how the impedance looking into one antenna was impacted when leaving one of the antennas open, shorted and terminated in 50 ohms.
By
WB2UAQ
·
#28642
·
|
Re: Using a nanoVNA as a passive receiver
Thank you very much for the precise answer. For the TinySA, I read: Manually selectable resolution filters of 3, 10, 30, 100, 300, 600 kHz. Automatic selection of one of 57 resolution filters. What do
By
F1AMM <18471@...>
·
#28641
·
|