the nano vna gets you in the game and that's a game changer for so many people who cost is a barrier to entry (and i can say from experience that cost kept many out of the game) great video..
mine is used for antenna check/tune and coaxial cable verification (i can to see on it the length of my coax cable and if any open/short, with the distance of it, before my antenna).. i can do a cable impedance check too if needed.. for me it's a must to have in RF!! ❤
As said, I have thrown 2 Nano VNAs in the garbage, because batteries were about to explode. Now I have a Rig Expert Stick Pro Antenna Analyzer/. Works great!!!!!
I want to build an RLC circuit with all variable components to add to my antenna lab. I've already sourced a variable plate capacitor, log potentiometer, and will hunt down some variable inductors. It's like building a whah pedal circuit for RF... I will run some spreadsheets to determine the ideal tuning ranges... .22uF Cap, 1K Pot, 10uH Inductor...
A low return loss means a HIGH SWR. Return loss is measured in positive numbers. A 12dB return loss might be like a 1.7:1 SWR. There are calculators online that will convert for you.
Somehow this explanation of Smith charts actually clicked with me, whereas the explanation in the extra handbook just kinda bounced off. I think the real-world context helps a lot, at least for how my brain works. I have a nanovna and I have used it to tune some things, but I'm still suspicious of its accuracy. Without having a $14k VNA to compare to, what could I do to validate its results? In particular for things more complex than a simple SWR reading.
@@3henry214 No, it answered the question "How accurate is Jensen's Nano VNA". Given that it's an open source design and produced by a lot of manufacturers, it's still a valid question to ask if _my_ Nano VNA is accurate, or how to figure that out.
I will admit regardless of any explanation I've watched this nano baffles me, swr and feedline readings are easy but for resolving or investigating any other issues I'm lost.. 🤷🏼♂️
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the nano vna gets you in the game and that's a game changer for so many people who cost is a barrier to entry
(and i can say from experience that cost kept many out of the game)
great video..
You’re the man Dave. 6 months ago: “nanovna too complicated don’t use it”
Today: “nano vna to solve real world problems
mine is used for antenna check/tune and coaxial cable verification (i can to see on it the length of my coax cable and if any open/short, with the distance of it, before my antenna).. i can do a cable impedance check too if needed.. for me it's a must to have in RF!! ❤
Thank you, Dave.
Amazing how tiny things are now. N0QFT
I told ya Dave! Now that VNA's are affordable, anybody that plays with RF much at all should learn how to use one. Good episode. Thanks!
I still have nightmares about using Smith charts in my university exams - this was a great explanation.
I had no idea how to make changes to the reactance on the smith chart. That's great!
Very interesting Dave, thank you; 73 Bob
As said, I have thrown 2 Nano VNAs in the garbage, because batteries were about to explode.
Now I have a Rig Expert Stick Pro Antenna Analyzer/. Works great!!!!!
The NanoVNA definitely punches above its weight. W2AEW has a video on tuning a duplexer.
Nice Dave, fun stuff!
I want to build an RLC circuit with all variable components to add to my antenna lab. I've already sourced a variable plate capacitor, log potentiometer, and will hunt down some variable inductors. It's like building a whah pedal circuit for RF... I will run some spreadsheets to determine the ideal tuning ranges... .22uF Cap, 1K Pot, 10uH Inductor...
I have as much fun using my NanoVNA as I do my radio.
A low return loss means a HIGH SWR. Return loss is measured in positive numbers. A 12dB return loss might be like a 1.7:1 SWR. There are calculators online that will convert for you.
Somehow this explanation of Smith charts actually clicked with me, whereas the explanation in the extra handbook just kinda bounced off. I think the real-world context helps a lot, at least for how my brain works.
I have a nanovna and I have used it to tune some things, but I'm still suspicious of its accuracy. Without having a $14k VNA to compare to, what could I do to validate its results? In particular for things more complex than a simple SWR reading.
You must have missed this @ 13:10 where the question "How accurate is a Nano VNA " is answered... very accurate.
You need to know how to calibrate it so you can see the results you are desiring to measure.
@@3henry214 No, it answered the question "How accurate is Jensen's Nano VNA". Given that it's an open source design and produced by a lot of manufacturers, it's still a valid question to ask if _my_ Nano VNA is accurate, or how to figure that out.
I will admit regardless of any explanation I've watched this nano baffles me, swr and feedline readings are easy but for resolving or investigating any other issues I'm lost.. 🤷🏼♂️
I take it you are getting complaints about how much time you spend shilling patreon. Excellent solution.