Re: THE UNUN
Here it is Ed: "The turns ratio shown is actually 2:15, implying a nominal impedance ratio of 1:56 (NOT 1:49), or a nominal load of 2813 ohms. Beside that, the measurement technique looks sound." This
By
Jon
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#40249
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Re: THE UNUN
Thank you Alan for the clarification. 73 Jon, VU2JO [email protected]> wrote:
By
Jon
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#40248
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Re: THE UNUN
Jon- Please repost Owen¡¯s comments to which you refer. Thanks Ed McCann AG6CX
By
AG6CX
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#40247
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Re: THE UNUN
Hello Jon. What you demo in the video is quite fine. No issue and Owen's comment is appreciated and correct. The turns ratio appears to be 15 to 2 or 56.25:1 not 49:1, no issue. Yes, the dipole is a
By
alan victor
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#40246
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Re: THE UNUN
I got this comment below the video today: "The turns ratio shown is actually 2:15, implying a nominal impedance ratio of 1:56 (NOT 1:49), or a nominal load of 2813 ohms. Beside that, the measurement
By
Jon
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#40245
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Re: THE UNUN
ok on all Dave... However, what Jon shows in the video, the infamous UnUn is not an autotransformer... In summary, the key difference between an autotransformer and a transformer is the presence of a
By
alan victor
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#40244
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Re: THE UNUN
Thank you Dave for the clarification. 73 Jon, VU2JO [email protected]> wrote:
By
Jon
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#40243
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THE UNUN
Regarding the following message: "This is how I checked my 49:1 unun for EFHW with NanoVNA: https://youtu.be/1JUI4rO3T2g 73 Jon, VU2JO" *** An UnUn is not a balun and is incapable of transforming
By
W0LEV
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#40242
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Re: Unun Testing - Is a Attenuator really needed?
#calibration
#measurement
#nanovna-h4
This is how I checked my 49:1 unun for EFHW with NanoVNA: https://youtu.be/1JUI4rO3T2g 73 Jon, VU2JO [email protected]> wrote:
By
Jon
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#40241
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Unun Testing - Is a Attenuator really needed?
#calibration
#measurement
#nanovna-h4
I purchased a H4 back about 12 ago. Up until now, it's only been used for SWR testing, but now I want to test the Chokes & Unun's I build. I have watched a number of YouTube videos on how this done
By
VK4CCV
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#40240
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Measuring L&C
This is an excellent video for those like me seeking to understand how to use the Nano VNA. The video is in Polish but you can change the sub titles to English and slow the video down.
By
Phil Brown
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#40239
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Re: Windows 11 & NanoVNA H4
Yes
By
Torbj?rn Toreson
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#40238
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Re: Windows 11 & NanoVNA H4
Will the win32 version run on W11 64bit? Regards
By
Noel
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#40237
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Re: Windows 11 & NanoVNA H4
Hopefully better readable now (spaces ignored, why?). Thank you Torbj?rn. After receivng a reply from Maurizio, I searched again on the github page of Dislord (also tipped by Stan), although I had
By
PE0CWK
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#40236
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Re: Windows 11 & NanoVNA H4
Thank you Maurizio for your reply. Torbjorn refered me to the Github site of DiSlord https://github.com/DiSlord/NanoVNA-App/blob/main/Win32/Release/NanoVNA-App.exe 73, Kees, PE0CWK Op 5-5-2025 om
By
PE0CWK
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#40235
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Re: Windows 11 & NanoVNA H4
Thank you Torbj?rn. Afterreceivnga reply from Maurizio,IsearchedagainonthegithubpageofDislord(also tipped by Stan), althoughIhadalreadydonethatyesterday,thenapparentlyIdidn'tlookwellafterall.I found
By
PE0CWK
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#40234
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Re: Windows 11 & NanoVNA H4
Kees, Please regard that there are at least three versions of NanoVNA-App, the original by OneOfEleven, one modded by Owen Duffy, one modded by DiSlord, possibly more. It is the one modded by DiSlord
By
Torbj?rn Toreson
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#40233
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Re: Windows 11 & NanoVNA H4
Thank you Maurizio for your reply with photos. I had already searched the internet thoroughly but did not find a newer version than 1.1.208. However this morning I found version 1.1.209 on the github
By
PE0CWK
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#40232
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Re: Windows 11 & NanoVNA H4
Hi Kees , you
By
Maurizio IZ1MDJ
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#40231
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Re: Selection of nanoNVA for HAM radio use??
It is also very easy to damage ANY instrument by connecting a charged cable to one of its inputs. A cable can pick up a charge from being flexed or from the internal friction of being unrolled;
By
Donald S Brant Jr
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#40230
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