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Re: soil conductivity map of the US
nice as a guide, but lots of places have had *significant* changes in development since 1954 when the data that goes into that map (published in 1972) was likely taken. At a guess, I would think the
By Jim Lux · #15461 ·
soil conductivity map of the US
If you like other people¡¯s measurements, you might like a map of ground conductivities of the US at ¡°broadcast band¡± frequency. https://www.fcc.gov/media/radio/m3-ground-conductivity-map (Chuck
By Charles Young · #15460 ·
Re: SMA Torque Wrench
The threads shouldn't make any difference in leakage on an SMA. The mating surface is the shield, and the threads are just there to "push" the connector together tightly. After all, there are SMA
By Jim Lux · #15459 ·
Re: NanoVNA firmware user interface mod #mods
I haven't added the graph/trace type you wanted, but I have made it so that you can now have two separate graphs on show at the same time so that you can choose whatever combination you like DMR, I
By OneOfEleven · #15458 ·
Re: SMA Torque Wrench
I do work for an SDR developer whose radios span < 1MHz to > 18GHz. We have all the "good gear" for test and measurement because our customers often insist on it. That said, below 500Mhz there isn't
By Chuck · #15457 ·
Re: Useful frequency range of NanoVNA H-4?
They are TOKO 5HT filters. The tuning element is a ferrite with a slot in the top of it. I don't know if the e-mail allows photos, but I attached one. I did the full OSLT cal and stored it in one of
By Zack Widup · #15456 ·
Re: Useful frequency range of NanoVNA H-4?
I love it. One question spawns many more, the number of questions increasing in excess of the geometric progression, 1, 2, 4, 8, 16...... Dave - W?LEV -- *Dave - W?LEV* *Just Let Darwin Work*
By W0LEV · #15455 ·
Re: Determination of Soil Characteristics with Nanovna
This is the open-wire line approach first described by George Hagn. Rudy Severns isn't so wild about it. He uses a probe and ground screen approach.
By Jim Lux · #15454 ·
Re: Determination of Soil Characteristics with Nanovna
Hi all I cant thank you enough for all the helpful replies I have received In retirement I seem to have become a historian! See QRZ.com My interest in ground electrical properties stems from my
By John Moyle <Drjmoyle@...> · #15453 ·
Re: Useful frequency range of NanoVNA H-4?
What bandwidth are you expecting? At least one triple resonator 1296 MHz filter that I have seen recently is wider than the 40 MHz you are sweeping. What loss is the S21 indicating? What is it
By Dave W6OQ · #15452 ·
Re: Useful frequency range of NanoVNA H-4?
How are the resonators tuned? Screws through a soldered-in-place nut do not make a good solid contact. I've tried it many times at both 1296 and the H1 line (1420.405 MHz), and the result is unstable.
By W0LEV · #15451 ·
Useful frequency range of NanoVNA H-4?
I thought I'd use my NanoVNA H-4 to tweak a 3-pole helical filter for 1296 MHz that I have for a transverter. The helical filter is mounted on a pc board with SMA input and output. I calibrated the
By Zack Widup · #15450 ·
Re: Determination of Soil Characteristics with Nanovna
This may help you https://www.dl1glh.de/groundconductivity.html Juan Pablo EA4CIV
By Juan Pablo EA4CIV · #15449 ·
Re: SMA Torque Wrench
I saw a comparison of Nano vna with expensive devices, the graphs are very similar! So no need to kill the brain of radio amateurs! This device is made for them!
By aleks07111971@... · #15448 ·
Re: SMA Torque Wrench
This thread is degenerating into a here is why everyone asking questions is stupid. All those with such great knowledge have made their point and need to move on. Those of us without great knowledge
By John Nicholas · #15447 ·
Re: Intro and Noob Question
Will it run under Windows 10 64 bit, and if so how? Command line entry?? Thanks Darrell N5FTW Sent from my over-rated IPhone 7 Plus. Any Mis-spellings or grammar errors are due to my IPhone auto
By Darrell Carothers · #15446 ·
Re: NanoVNA firmware user interface mod #mods
One more question. Is it possible to enable the color command? I modified the color of the strokes a little and I would like to do the same on your FW.
By Igor - PY3IG · #15445 ·
Re: nanoVNA vs nanoVNA-F vs nanoVNA-H What is the difference??????
Thank you! I didn't know there was a wiki. I could not find one using due duck go; I guess I just didn't use the proper verbiage to get where I wanted to be. larry
By Lawrance A. Schneider · #15444 ·
Re: nanoVNA vs nanoVNA-F vs nanoVNA-H What is the difference??????
Thank you! larry
By Lawrance A. Schneider · #15443 ·
Re: NanoVNA firmware user interface mod #mods
Thank you OneOfEleven !! I have now tested nanoVNA.exe because I had not yet tested it. I liked the software, it has all the necessary information. Perhaps the slightly larger letters would help
By Igor - PY3IG · #15442 ·