Re: SMITH CHART TUTORIAL
From: KV5R Umm, I love to, but no... U.Kansas makes them publicly available (not restricted to student accounts), but re-packaging and posting them, without written permission, would not be
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David J Taylor
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#9176
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Re: Bi-Quad Antenna 430 MHz is this a good one?
#calibration
Where do you want the radiation to go? Biquads typically have strongest pattern broadside to the bowtie. Mounted flat on the ceiling, that would be primarily to zenith. Are you planning to communicate
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Bob KV4PC
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#9175
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Re: SMITH CHART TUTORIAL
Umm, I love to, but no... U.Kansas makes them publicly available (not restricted to student accounts), but re-packaging and posting them, without written permission, would not be appropriate or legal.
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KV5R <kv5r@...>
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#9174
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Re: NanoVNA Presentation
#measurement
#nanovna-saver
#tutorials
This will mainly interest the DUTCH speaking members I posted two videos on YouTube with my presentation on the NanoVNA Part one is about complex impedance, transmission lines, S-parameters and the
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Luc ON7DQ
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#9173
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Re: Alibaba ordering
Amazon has become a disaster. You never know from whom you are getting the product even dough you might have purchased from a specific seller and saw a specific picture of the item. If the sale is
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nanovnagroup@...
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#9172
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Re: What is the best method to measure a stripline impedance with the nanoVNA????
It is about as good as you can get without a good TDR instrument. The objective of looking for high Z resonance peak at quarter wavelength is to verify Vp. Stray reactance on the 50 ohm port will
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roncraig1@...
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#9171
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Re: SMITH CHART TUTORIAL
KV5R, They are the handout for the courses on antenna and feedlines. As such they are often read this, evaluate this question. If your going to suck those files up, then get the books that go with
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aparent1/kb1gmx <kb1gmx@...>
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#9170
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Re: SMITH CHART TUTORIAL
Folks, if you want these please remember that you may be accessing a system that is supposed to be restricted to University of Kansas students who pay for the courses associated with these files.?
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Larry Rothman
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#9169
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Re: SMITH CHART TUTORIAL
Thanks, Dave! If you remove the filename from that link, e.g., http://www.ittc.ku.edu/~jstiles/723/handouts/ , there's an index of over 300 RF engineering course files there! I collected them all...
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David J Taylor
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#9168
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Re: errors of "error" models
Many VNA's use a wheatstone bridge (few use V/I measurement). A wheatstone bridge has a design Z0 for which it provides most sensitivity. Z=(R-Ro)/(R+Ro) This graph shows the output of the bridge
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Erik Kaashoek
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#9167
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Re: errors of "error" models
Gary, The point Jef wants to make is that above statement is NOT true for well characterized but non perfect calibration standards. The characterization (polynome) will describe where for instance the
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Erik Kaashoek
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#9166
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Re: errors of "error" models
GIN&PEZ, Erik, Jeff, et al; Absurd and it's derivatives is probably not the most descriptive of the points being made. Consider this a trigger word that translates with emotional overtones. As all of
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Gary O'Neil
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#9165
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Re: errors of "error" models
On Sat, Jan 4, 2020 at 03:55 PM, gin&pez@arg wrote: Hi gin&pez: > > After that said, also allow us, please, to consider now that our way to use > this mathematical model, that is * w i t h o u t * the
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Jeff Anderson
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#9164
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Re: Cancelling out coax feeder length?
Alan, THANK YOU, I have to re-read and save this and give it a whirl to understand it better. I¡¯m a visual guy, so I have to see it before I can understand and believe it... My interest is mainly in
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Chris K2STP
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#9163
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Re: SMITH CHART TUTORIAL
Thanks for the tip, Harold. I shall have a look. Based on the quality of the Smith Chart treatment, they must be excellent. Just hope others take advantage. Have a read of my QRZ page to find out what
By
W0LEV
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#9162
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Re: errors of "error" models
#106": More On The Fourth Load VNA Trick @Jeff Anderson - 4 January 2020 - /g/nanovna-users/message/9158 Dear Jeff, Thank you very much for your most valuable information, by which
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gin&pez@arg
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#9161
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Re: SMITH CHART TUTORIAL
Thanks, Dave! If you remove the filename from that link, e.g., http://www.ittc.ku.edu/~jstiles/723/handouts/ , there's an index of over 300 RF engineering course files there! I collected them all...
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KV5R <kv5r@...>
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#9160
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Re: NanoVNA-saver and Windows XP
Something is escaping me... there are a few reports of persons that are able to run nanovna-saver under Windows XP SP3 (as I have). But the API in kernel32 that the program complains to be unable to
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Alberto I2PHD
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#9159
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Re: errors of "error" models
On Sat, Jan 4, 2020 at 01:33 PM, gin&pez@arg wrote: Hi gin&pez > " > Therefore, the Absurdness does not belong to us, > but to VNA itself, because: > > (a) It considers by default that all the
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Jeff Anderson
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#9158
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Re: errors of "error" models
@Gary O¡¯Neil, N3GO /g/nanovna-users/message/9132 Dear Gary, Well, allow us, please, to remind you that we would not arrive at this - most spectacular, indeed ! - conclusion, if you
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gin&pez@arg
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#9157
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