Re: Nano VNA H-4 ver 1.2.27
Dean,
Can you kindly explain the method you have used to measure inductance and
capacitance with NanoVNA?
73
Jon, VU2JO
[email protected]> wrote:
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Jon
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#40069
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Re: Nano VNA H-4 ver 1.2.27
Phil, Are you using Nano VNASaver software on your computer to connect to the NanoVNA or are you trying to do it directly? First thing to remember is, Calibrate at the connection you are using to
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Dean - KC9REN
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#40068
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Re: Nano VNA H-4 ver 1.2.27
Though I have been using NanoVNA for a few weeks now, I was not aware that
it can be used for measuring inductance and capacitance. Now I will also
join your search!
Currently I use my LCR meter to
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Jon
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#40067
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Nano VNA H-4 ver 1.2.27
Hi Everyone, I'm new to the VNA and trying to measure both inductance and capacitance but getting stupid results. Is there someone who has this version of the VNA could walk me through the setup and
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Phil Brown
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#40066
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Re: How do I measure this Maxwell choke?
Yes, that is the reference choke...
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John Leach K0JHL
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#40065
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Re: How do I measure this Maxwell choke?
Is this the reference to what you are trying to do?
https://www.dj0ip.de/open-wire-fed-ant/balanced-line-choke/
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Steve Withnell
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#40064
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Re: How do I measure this Maxwell choke?
Hi
The choc of john its exactly an 1/1 balun made by a lot of ferrites, measuring a balun with an NanoVNA on a chack its a thing and results of balun mounted with a dipole antenna was a different
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Team-SIM SIM-Mode
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#40063
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Re: How do I measure this Maxwell choke?
I think this is not correct in this case, Nizar. Measuring the choke is not measuring a transmission line with specific characteristic impedance that needs matched; it is more like measuring an
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Stan Dye
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#40062
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Re: How do I measure this Maxwell choke?
I wouldn't really describe this as a "common mode" (although that is used) - it's really better conceptualized as a third wire which is connected to the feedpoint, as Roger said. As noted, the choke
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Jim Lux
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#40061
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Re: How do I measure this Maxwell choke?
Users of a Maxwell or W2DU choke need to be aware that the effectiveness in reducing common mode current is not directly related to the magnitude of the impedance |Z| or S21 loss that they measure
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Roger Need
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#40060
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Re: Jog Switch does nothing??
I had bought one off ebay and it arrived in the smallest possible box, and when I took it out of the box that switch was at a rather odd angle, and did nothing. I returned that one, no issues with
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Roy J. Tellason, Sr.
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#40059
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Re: How do I measure this Maxwell choke?
Hi
S11 Smith measurements or S11 IZI is also possible , it should have higher then 1500 Ohm as mentionned by the paper , no care with one wire or two wire connected together , it should be
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Team-SIM SIM-Mode
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#40058
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Re: Jog Switch does nothing??
I find the jog wheel quite useful for moving the marker. Alternatively you
can use the Search Minimum function in the menu to find minimum SWR point
in the tracing.
I have not opened the casing for
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Jon
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#40057
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Re: How do I measure this Maxwell choke?
Ooooopps...... I looked at the picture but saw what I expected: Coax.
Thanks, Stan, for bringing this to my attention.
Test just like my common mode chokes on toroids. Either or both wires
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W0LEV
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#40056
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Re: Jog Switch does nothing??
The jog wheel is an a control that allows an alternate way to bring up the menu and select the menu items.
So if you are happy with doing it on the touch screen, you are not missing much. There are
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Stan Dye
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#40055
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Re: How do I measure this Maxwell choke?
In this case, Dave, if you look at his picture, he is using two wires for the choke conductors, not a coax. So either or both wires together should work.
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Stan Dye
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#40054
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Re: Jog Switch does nothing??
To clarify, it's a NanoVNA H (classic) and matches the image for a good model in the Wiki.
--
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Do Justly Love Mercy. Walk Humbly.
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DouglasK
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#40053
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Jog Switch does nothing??
I have a NanoVNA (2.8" screen) from about 2020. Overall it works well, but the Jog Switch doesn't do anything.
The touch screen works fine, it calibrates OK and measures SWR with ease... but the jog
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DouglasK
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#40052
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Re: How do I measure this Maxwell choke?
Since the center conductor closes fields to the interior surface of the
coax shield, it does not interact with external fields. Therefore, it's
only necessary to connect the outer shield between the
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W0LEV
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#40051
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Re: How do I measure this Maxwell choke?
I do a 'loss' measurement rather than an impedance measurement. To do this, do a 'through' measurement (S21), either on a single wire, or both wires together, connected to the center pins of the
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Stan Dye
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#40046
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