Re: RETURN LOSS thoughts de k3eui
Well, since you are being pedantic (don't get me wrong, I like pedantic, it helps add clarity and reduce confusion): Exactly Now you've got it backwards again. Return signal is attenuated by some
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William Smith <w_smith@...>
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#23003
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RETURN LOSS thoughts de k3eui
I have been wondering for months why I object to RETURN LOSS being a "positive value". Yes, we are talking about a LOSS. And of course the formula shows RL = -20 log (rho) Since rho is a number
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Barry K3EUI
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#23002
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Re: I/O RF Matching net-works measuring with NANO-VNA
#applications
Hi Peter, every amplifier (Transistor or Tube) will change its input (and output) impedance due to bias. So input (and output) impedance of impeadance matching network as shown in your picture will
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schweppe
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#23001
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Re: I/O RF Matching net-works measuring with NANO-VNA
#applications
Sure, a couple of possibilities: 1) When your power supply is off it's a high impedance, and when it's on it's a low impedance, so you are at the very least switching in another inductor. 2)
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William Smith <w_smith@...>
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#23000
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I/O RF Matching net-works measuring with NANO-VNA
#applications
Hi there ... Appreciating several features of this incredible instrument, I'm attempting to check the real Impedance of the Matching network INPUT (and/or out-put) value associated to a VHF RF
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Peter
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#22999
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Re: last iteration of Nano VNA PPT de k3eui
Barry, Many Thanks, I will distribute this to our Club since many have shown interest in the Nano VNA but have avoided purchasing since so many "fake" units are marketed and we are assisting in
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Steve Sawicki
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#22998
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Re: last iteration of Nano VNA PPT de k3eui
Thanks. I liked you ppt files. Gustavo Em Dom, 27 de jun de 2021 14:01, Barry K3EUI <k3euibarry@...> escreveu:
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dipmgu@...
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#22997
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Re: last iteration of Nano VNA PPT de k3eui
And here is last weekend's ZOOM talk on Nano VNA Part II (Under the Hood Advanced stuff) This is about as far as I can understand - right at my envelope of understanding. Watch this video if you have
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Barry K3EUI
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#22996
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Re: anti-stati foam sheets for lining case
I added a strap of anti static foam between the bottom and top after the I took the attached pic.
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Lou W7HV
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#22995
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Re: Simple Latest Firmware list available and links to download?
it's more, as fonts. please read change log to versions 1.0.50, 1.0.53 and 1.0.64: /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware
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Vladimir Lebedev
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#22994
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Re: Simple Latest Firmware list available and links to download?
Very Helpful. If it's only the font issue and no major functional improvements, I might just not update it.
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Brumey <kevin@...>
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#22993
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Re: anti-stati foam sheets for lining case
Clever idea... Roger
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Roger Need
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#22992
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Re: Simple Latest Firmware list available and links to download?
Version 1.0.45 is the latest firmware released by Hugen for his NanoVNA-H. It has a lot of features and I suggest you get used to using it before you even consider updating your firmware. The Absolute
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Roger Need
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#22991
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Re: Simple Latest Firmware list available and links to download?
please compare two screenshots of Hugens 1.0.45 and DiSlord's 1.0.64
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Vladimir Lebedev
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#22990
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Re: Simple Latest Firmware list available and links to download?
and important for beginner: /g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA
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Vladimir Lebedev
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#22989
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Re: Simple Latest Firmware list available and links to download?
Hello Brumey! In the files section ---> /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware Last version for both - NanoVNA-H and NanoVNA-H4 from DiSlord. Or here
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Vladimir Lebedev
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#22988
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Simple Latest Firmware list available and links to download?
Hello: I just purchased a NanoVNA-H and a sticker on the back saying its Hardware Version 3.5. I was expecting to see a quick link to a Firmware version list, Change log and link to the firmware and
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Brumey <kevin@...>
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#22987
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Re: FM5324B and FM5401 - NanoVNA-H4 Battery Charger and 5 Volt Converter Circuit
Jim - I am also using the Kill-A-Watt meter. In the case of the 7.8 watt reading, the Power Factor was 0.60 along with the higher Volt-Amp reading. The three AC to USB power adapters all get quite
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Kent AA6P
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#22986
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Re: anti-stati foam sheets for lining case
What we do at JPL is use conventional foam, and cover it with antistatic film (like the stuff they use for ESD bags - the silvery stuff, not the pink stuff. The pink stuff sheds particles), taping it
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Jim Lux
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#22985
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Re: VNA shootout
Jim: The optimal way would be to measure several standard articles on each test analyzer and compare the S2P files from each instrument. The classical verification/transfer standards are a Beatty
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Donald S Brant Jr
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#22984
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