Re: RF Demo Kit Testing tutorial released
Beware!! the "N" connector center pin has a greater diameter then the center pin of the BNC connector. If you push a N Male connector onto a female BNC you will spread the fingers of the BNC female.
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Clyde Spencer
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#14514
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
Perhaps my answer will be rude, but I am not a manufacturer of devices, I do not sell my software. You can use it, but you can not use it. I see no reason for someone to make me do something. I write
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DiSlord
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#14513
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Re: RF Demo Kit Testing tutorial released
Yes, the PL-259 and So-238 were developed by Mr. Quackenbush at Amphenol in the1930s.?? The problem is if you treat the inter-outer diameters like coax, you come outwith about 30 Ohms.?? So you
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KENT BRITAIN
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#14512
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
You know that since this is an opensource, whatever change is released with a binary file should have its source in the relevant repository. From what it looks you do not follow that and you release
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Aristarchus
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#14511
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Re: First Steps
Same issue: ¡®Hundreds¡¯ of YouTubes. A suggestion list of You Tubes from WB8GUS From Time Comment Link How it works? IMSAI Guy 16:49 Okay https://www.youtube.com/watch?v=cU05VVFl0N0 What is a VNA
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Donald Warner
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#14510
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Re: RF Demo Kit Testing tutorial released
Hi Edward, I have a fellow member in my local club that worked at Amphenol and knew the engineers who made the TNC, N, C, BNC connectors. These letters are just the initials of the engineers. I keep
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Danny K5CG
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#14509
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NanoVNA Test Board
Anyone using this setup? https://www.ebay.com/itm/203017157354 Dave/N9ZC
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Dave Merrill
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#14508
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
Before release, I wanted to get a feedback about how well SD card code works (for better response it contain a lot of debug info sended in console). Need remove debug code and then i upload it to git,
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DiSlord
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#14507
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Re: RF Demo Kit Testing tutorial released
BNC does NOT provide a good consistent connection. That¡¯s why a threaded version, called TNC was invented. BNC connectors would be a poor choice for a test port on a VNA. There are no professional
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Dr. David Kirkby, Kirkby Microwave Ltd
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#14506
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Re: RF Demo Kit Testing tutorial released
Regarding a proper connector, I'm amazed that no-one has mentioned the old-as-the-hills, but still? excelleent and durable BNC connector.? It's more sturdy, can tolerate many thousands of insertions
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Edward Lukacs
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#14505
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Re: Wich one the get ? nanoVNA F or H4
I bought a -F (clone, for $84 via AliExpress) and received it a couple of weeks ago. It is FAR, FAR nicer to use (meaning "see" or "read" than the standard 2.8 inch model I've had since last October.
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DougVL
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#14504
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Re: U.Fl calibration kit
Ok, I took your advice and after calibrating I tried a U.Fl to SMA on the through with a known SMA dipole antenna and the measurement was spot on... implying the 'too low' measurement is probably
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MarkZ
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#14503
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Re: U.Fl calibration kit
Thanks everyone for the info. I did order/receive one of those apparently ubiquitous boards with male u.fl connectors on it. Although the open/short/load seemed to work to calibrate the cable, the
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MarkZ
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#14502
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
@DiSlord Your work is very good. But, is there a repository with your changes for the H4 that we can use to compile ? Specifically with the latest nice additions on H4. Seen the binary files but I
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Aristarchus
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#14501
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Re: RF Demo Kit Testing tutorial released
For professional use I would agree. But amateurs don¡¯t need to be tune antennas in the rain, which makes weatherproofing an unnecessary expense. But for any outdoor use, an N connector is pretty
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Dr. David Kirkby, Kirkby Microwave Ltd
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#14500
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Re: RF Demo Kit Testing tutorial released
Personally, the "pocket sized" nature of the NanoVNA is a major attraction. Even an R+S portable would be too big for my particular application. Be that as it may: in my opinion, for proper outdoor
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namerati@...
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#14499
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Re: Wich one the get ? nanoVNA F or H4
Thanks Herb, for the information -- "K4EGP / Edward G Prentice" <K4EGP.ham@...> Retired software engineer QTH:EM95na
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Edward
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#14498
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Re: Comparison between #nanovna-f and
#nanovna-f
#nanovna-h4
Ah, Wiki, Sorry I did not check that. Will do. Thank you! -- "K4EGP / Edward G Prentice" <K4EGP.ham@...> Retired software engineer QTH:EM95na
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Edward
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#14497
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Re: Comparison between #nanovna-f and
#nanovna-f
#nanovna-h4
Agree 100%Sent from my Samsung Galaxy smartphone.
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RandMental
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#14496
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Re: Comparison between #nanovna-f and
#nanovna-f
#nanovna-h4
nanoVNA in general is an open source, open hardware project so should be all its derivatives. The nanoVNA-F is a 'fork' of the original nanoVNA that is not open hardware (at least from what is shown
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Aristarchus
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#14495
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