Re: Antenna tuning in field, calibration with SMA cal set followed by BNC and UHF adaptors
The S11 minimum return loss does not indicate resonance.? Common mode current can affect the value and thus the SWR and mislead you when you are not measuring at the antenna.Only J0=0 indicates
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Michael Black <mdblack98@...>
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#29854
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Re: Off topic nanoVNA: EZNEC
That's unfortunate. I am a subscribed member, and the general info page for this group indicates: "[email protected] (disabled because this group cannot add any more members)" and there's only
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va3rr
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#29853
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Re: Off topic nanoVNA: EZNEC
If has probably reached the membership limit for the group type. The only thing I can think of is to retry joining every so often in case someone drops out of the group. DaveD
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Dave Daniel
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#29852
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Re: Off topic nanoVNA: EZNEC
** It begins badly 4NEC2 displays This Group Cannot Add Any Members 4nec2defguide is open but 2 messages in 2022 and 1 message in 2021 Your advice please ** MMna, I gave. It does not know how to
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F1AMM <18471@...>
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#29851
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Re: Off topic nanoVNA: EZNEC
Sidenote.. I still prefer mmana Easy graphical editor Lots of functions Free Dg9bfc sigi Am 14.10.2022 14:36 schrieb Dave Daniel <kc0wjn@...>:
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Siegfried Jackstien
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#29850
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Re: Off topic nanoVNA: EZNEC
As I wrote earlier, I haved used EZNEC but not (yet) 4NEC2, so I can¡¯t advise you about versions and documentation for 4NEC2. For that information, I would go to the 4NEC2 group. DaveD
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Dave Daniel
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#29849
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Re: Off topic nanoVNA: EZNEC
Thanks for your advice. I had started using 4nec2. I switched to EZNEC because there was a notice that I translated into French. The version of 4nec2 that I have is 5.9.3 Is this the correct one? I
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F1AMM <18471@...>
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#29848
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Re: Antenna tuning in field, calibration with SMA cal set followed by BNC and UHF adaptors
If you just need to tune an antenna "on frequency" you do not even need to calibrate your VNA; it will show the S11 return loss dip at the correct frequency; the magnitude will be wrong but it is not
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Donald S Brant Jr
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#29847
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Re: Off topic nanoVNA: EZNEC
That is a superficial comparison of the two simulators. Now that you are a member of the ham-antennas group, you should find and read the posts in that group from W0LEV comparing the two simulators.
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Dave Daniel
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#29846
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Re: Off topic nanoVNA: EZNEC
Thanks a lot. I just subscribed to this group and will read the posts. This is probably a solution to my communication difficulties. I'll be sure to keep you posted. -- F1AMM Fran?ois
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F1AMM <18471@...>
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#29845
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Re: Off topic nanoVNA: EZNEC
4nec2 is much less efficient than EZNEC. EZNEC offers, in particular, a very good antenna geometry editor. EZNEC "opens" .NEC files but unfortunately they are only rarely compatible because 4nec2
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F1AMM <18471@...>
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#29844
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Re: Off topic nanoVNA: EZNEC
There is also a 4NEC2 group which is slightly (but not mgch) more active than the EZNEC group. The ham-antennas group often discusses antenna modeling using EZNEC and/or 4NEC2, among others. There is
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Dave Daniel
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#29843
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Re: Off topic nanoVNA: EZNEC
As an alternative, you might take a look at 4nec2. There is some information about the 4nec2 application and the classes our Rochester NY Amateur Radio Service club is running for Antenna Modeling
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Joseph DiVincenzo AD2DB
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#29842
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Re: Off topic nanoVNA: EZNEC
Thank you for your reply. I understand the situation better and I was right to ask the question here. I guess HFSS and CTS are unaffordable on QSJ side by amateurs. It's funny to see that a hobbyist
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F1AMM <18471@...>
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#29841
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Re: Off topic nanoVNA: EZNEC
Hi Francois I worked with Roy at Tektronix 25 years ago and have been using ELNEC then EZNEC for 28 years. Good to see there is a EZNEC group, I wondered about that since Roy is 100% out of the
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KENT BRITAIN
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#29840
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Off topic nanoVNA: EZNEC
Hello I carefully follow the exchanges on /g/nanovna-users I see that many are also tinkering with the antennas. I'm taking my first steps with EZNEC. I translated Roy W. Lewallen's
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F1AMM <18471@...>
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#29839
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Re: Antenna tuning in field, calibration with SMA cal set followed by BNC and UHF adaptors
This video plus your description of how you did it is just what I was looking for. (also the other replies in this thread are really useful too) Thanks, folks!
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Connie
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#29838
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Re: Totally Lost!
I honestly do not have a clue what the hell I did but I figured it out? HAHA. I removed everything and started from the beginning again. I really don't like this result because I cant explain myself
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Bill WX2P
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#29837
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Re: Antenna tuning in field, calibration with SMA cal set followed by BNC and UHF adaptors
Thus is insteresting [email protected]> wrote:
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Martin Glazer
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#29836
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Re: Totally Lost!
This is the path on my PC: C:\Program Files (x86)\STMicroelectronics\Software\DfuSe v3.0.6\Bin\Driver\Win10
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Geoff Peters - AB6BT
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#29835
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