Re: Coax length and defect identification
Yes 100ft Mookeef RG-8X from Amazon.
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RJOLLIS
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#33191
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Re: S21 Function does not work with NanoVNA-saver
Sri? error? 73 qr0Envoy¨¦ depuis mon appareil Galaxy
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Joel Gui
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#33190
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Re: S21 Function does not work with NanoVNA-saver
Hello Robert et les amis?Je ne vous oublie pas mais impossible actuellement op¨¦ration ?il gauche reprise peut ¨ºtre fin du mois73qro et 88 ¨¤? tous les qrasF8EZZ? joelEnvoy¨¦ depuis mon appareil
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Joel Gui
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#33189
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Re: Wish list of future features for nanovna
Yahbut you've already got the sweeping receivers and log amp/detectors, adding rudimentary SA functions is just code. That is why so many instruments, including from the big manufacturers, combine
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Donald S Brant Jr
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#33188
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S21 Function does not work with NanoVNA-saver
It works with the NanoVNA-app software and the screen is correct. But the -saver S21 is just a scatter pattern. Help! Any idea what is wrong?
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WY6K Mike Watts
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#33187
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Re: Coax length and defect identification
That's pretty close to 50 ft. Sure it's a 100 ft coil?
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Jim Lux
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#33186
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Re: Coax length and defect identification
Also, for a cable that long using the 101pt scan, you need to set your stop frequency to about 70MHz to see the reflection from the whole length of the cable. So what you are seeing now may be due to
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Stan Dye
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#33185
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Re: Coax length and defect identification
Looking at your photo your yellow trace shows S21 linear instead of S11 Linear. I don't know what revision of firmware you have but recent firmware has a Cable Measure function built in. Have you
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Roger Need
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#33184
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Re: Coax length and defect identification
John. Thanks for your reply. Yes I have examined 2 meters each side of center. No issues are visible. That doesn¡¯t mean that there is no damage. I will look at return loss and characteristic
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RJOLLIS
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#33183
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Re: Coax length and defect identification
You didn't mention this but to me what you have determined is that there is something causing an indication close to the centre of your coax, have you visually inspected where the VNA is indicating
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John
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#33182
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Re: Coax length and defect identification
Postscript: I note that I the pictures that I had attached show a sweep from 500Khz to 200Mhz. This was a photo setup error. When resetting the stop frequency to 125Mhz, the peak moves ever so
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RJOLLIS
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#33181
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Coax length and defect identification
I have experienced a sudden and unexplained increase in the SWR of my HF antenna, I suspect the cheap coax or one of its pre-installed connectors. Before I chop the PL259s and install new ones, I
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RJOLLIS
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#33180
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Re: Wish list of future features for nanovna
Jim is right, a vector network analyzer should not be further burdened with the functions of a spectrum analyzer. Bob - N7WY
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n7wy
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#33179
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Re: Whats the best way to test your NanoVNA H4
#nanovna-h4
female female?? or sma to reverse sma?? a friend grilled his 13cm amp with using a sma to reverse sma (accidently) no contact ... swr sky high .. final amp went in semiconductor heaven dg9bfc sigi Am
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Siegfried Jackstien
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#33178
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Re: Whats the best way to test your NanoVNA H4
#nanovna-h4
Stan, OK, I have found the problem... And it is ME! First of all let me thank you for for explaining how to calibrate the NanoVNA; although I am well aware of how to do a calibration, it forced me to
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Muggs KC3UDZ
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#33177
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Re: Wish list of future features for nanovna
The tiny SA ultra.....with it's 4" screen, will also measure 2 tone IMD of a linear amplifier, like imd 3-5-7....and also harmonic suppression of a linear amplifier.
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Jim VE7RF
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#33176
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Re: Wish list of future features for nanovna
Hi David, The TinySA looks perfect for my needs - wow.
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erica edens <ericaedens369@...>
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#33175
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Re: Wish list of future features for nanovna
Erica, Yes, these devices are indeed remarkable! Many thanks for those who design and produce the devices and their extensive software. For a calibrated signal generator (and highly functional
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David J Taylor
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#33174
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Re: Wish list of future features for nanovna
NanoVNA can`t change output (only 4 steps), also output depend from frequency PS yes possible use external attenuator controlled by NanVNA over Serial, calibrate it. For this need software update
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DiSlord
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#33173
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Re: Measuring swr on fan dipole or windom antenna
What are your START and STOP frequency settings? On which bands is the antenna supposed to work? When I sweep a multiband antenna, the nanovna shows me the SWRs of all the resonances within the range
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DougVL
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#33172
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