Re: Calibrating to a long coax?
#applications
#calibration
#measurement
REF: /g/nanovna-users/message/13681 Hello, again. Well, after the Special Interest shown here, we would like to inform you that, in direct contrast with what Gary O'Neil, N3GO
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gin&pez@arg
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#13699
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Frequency error
I'm a little bit disappointed; i measured a CW 100MHz output from my NanoVNA-H received one week ago. The reference of my frequency meter is a 5MHz G3RUH GPSDO and i get a 99.99144 MHz (~ -85.5 ppm
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Rudolf Schaffer
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#13698
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Re: Oscillator 26MHz
Thank you for your quick reply and data-sheet's link. Rudi
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Rudolf Schaffer
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#13697
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Re: [Measuring] Is there an easy way to measure balun loss?
try to see https://github.com/mihtjel/nanovna-saver/issues/125 and
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gaionim@...
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#13696
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Re: Calibration issue causing ripples in SWR?
#calibration
The 50 ohms cables as far as I remember were rated by different manufacturers as 50 to 52 ohms years ago, so my guess is that 51 ohms is on the ballpark. It is also a standard resistor value. Try to
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Jose Amador
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#13695
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Calibration issue causing ripples in SWR?
#calibration
After calibrating, I connected my nanovna to my VHF antenna via a brand new 75 foot length of 50ohm DX400MAX coax. The SWR measurement oscillates up and down every 4MHz or so (see attached). These
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Edward L Platt
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#13694
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Re: UI Suggestion: Big Numeric Display Format for CW Stimulus Mode
Hi, Is it posible for add the big CH0 screen info in version 0.7.1-20200321 by edy555 ? Tnx Andy - ON7BA
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andybuyze@...
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#13693
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Re: Oscillator 26MHz
https://lcsc.com/product-detail/SMD-Oscillators-XO_TXC-Corp-7L26002009_C96479.html
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Hugen
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#13692
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Re: saver software linux
Bob- thanks will give that a try. Dan KC2STA -- Dan Ziolkowski KC2STA SKCC #4290T Ubuntu LINUX
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Dan KC2STA
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#13691
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Oscillator 26MHz
Hello, Can somebody give me the 26MHz oscillator reference for my NanoVNA-H ? Many TNX in advance. 73 QRO, Rudi, HB9ARI
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Rudolf Schaffer
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#13690
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Re: Reseting or proving that the new nanoVNA actually works
I think you need to explain "doesn't seem to be working." Does that mean that when you turn it on, absolutely nothing happens? Likewise, explain "don't get any results." Nothing appears on the screen?
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Jim Allyn - N7JA
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#13689
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Re: [Measuring] Is there an easy way to measure balun loss?
Luis, Yes, it should also work with an UNUN. A caveat: It should give a low VSWR (high return loss) when properly terminated. --John
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John Gord
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#13688
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Re: nanovna cases
#enclosure
... saving me the cost...
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M Craig Leftwich
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#13687
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Re: nanovna cases
#enclosure
By the way. This case was an especially a good deal for me because it was just a short 20 min drive from the store for me to go pick it up,swing m the cost of shipping. I also picked up some cheap BNC
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M Craig Leftwich
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#13686
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Re: Reseting or proving that the new nanoVNA actually works
The Nanovna-saver program has an issue where you can try and calibrate it and it doesn't work. Make sure you use the "calibration wizard" in the nanovna-saver program under the. You will soon learn to
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Robert Malsbury
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#13685
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Re: nanovna cases
#enclosure
P.S. The tubing was placed back over the stylus and the the assembly was held in place while running the beads of hot glue. This provides for proper alignment and acts as a heatsink for the pieces of
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M Craig Leftwich
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#13684
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Re: nanovna cases
#enclosure
The attachment for the stylus is two pieces of 3/8" heatshrink tubing I shank down around the stylus. The tubing can then be loosened for a good fit by rolling the stylus between two hard surfaces.
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M Craig Leftwich
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#13683
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Re: Reseting or proving that the new nanoVNA actually works
Scan for 10MHz to 500MHz. Your antenna is probably too long and will not show on the 140-150 MHz scan. WO4ROB ________________________________ Sent: Wednesday, May 20, 2020 1:38:05 PM To:
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Robert Cloutier
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#13682
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Re: Calibrating to a long coax?
#applications
#calibration
#measurement
Hello. Let us ask, please, two "rhetorical" questions, which are addressed to all readers of this thread: - Is there anyone, ever, wondered, in any similar to this, under discussion, case - that is
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gin&pez@arg
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#13681
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Re: [Measuring] Is there an easy way to measure balun loss?
I ran a test case with a 4:1 xmfr after adding resistive loss to the xmfr. A plot of return loss (from s11) and then transmission loss (from s21) is provided. Looks like 1/(1-|s11|) where S11 is
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alan victor
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#13680
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