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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
That looks great!
Got a H4 here and I see that there is space/footprint for a mini/micro? SD. Does anyone has a partnumber on what connector can we place there? |
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Re: Test do not read
Hello everyone,
I am the originator and co-owner of [email protected]. I can shed some light on occasional posts of this type (not necessarily this post, but it seems like a good reason to jump in, along with noting our first year of service!) --- About 2 months ago, the other Dave (our co-owner) suggested we change the group's new user policy to allow immediate join, but have "new user moderated", meaning that a new person can immediately join the group without delay (allowing reading messages the file/wiki archives), but may not freely post until their first post has been manually validated by either of the Daves (the post will be held and both of us will receive a notification e-mail when this happens). This was done to streamline the administrative workload (our group is now well over 6000 members, almost exactly a year since it was started 6/3/2019), as the number of first-post events is smaller than the number of join events (the change immediately had the desired effect for the two Daves). Usually the first post moderation clearance happens within a few hours at most, but occasionally a little longer as both of us are occasionally asleep at the same time or otherwise unavailable (we're both in US, in two separate time zones.) So, if you have joined the group at some point, and make your first-ever post (a new message post or a reply post), and don't see your first post appear in your e-mail (if you are on single message delivery), the next digest e-mail (there are usually several per day), or on the group's web interface messages area, it's awaiting new user moderation clearance, and once cleared, your posts will appear as quickly as system conditions permit. By the way, neither of the new user mechanisms (manually approve join request, but allow immediate posting, or automatically approve join requests, but moderate first posting) are foolproof at preventing spam (which is why groups.io doesn't permit a group to exist which has neither of these mechanisms in place) (we've been spammed a couple of times, the best way to handle that is to immediately flag the post as offensive, which will notify the two Daves who will ban the user and usually clean up the archives, although we can't prevent the spam and any follow-up posts from appearing in e-mail deliveries) without resorting to even more time/delay intensive moderation processes, so overall the current seems to be a reasonable balance between administrative workload and preserving the SNR (integrity) of the group. Thanks again for your interest and participation in nanovna-users on groups.io! 73, Dave |
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
Great, thanks!
I'll give it a try. Sent from Rogers Yahoo Mail on Android On Sat, 6 Jun 2020 at 10:54 am, DiSlord<dislordlive@...> wrote: On Mon, May 25, 2020 at 12:56 PM, Larry Rothman wrote: I compile NanoVNA - H firmware vs SD Card support, not tested, i hope it work If you have installed SD card slot on NanoVNA it you can try check work Work as on h4 version vs some limits (not supported exFat filesystem, and not use long filenames, limits from less flash size) Enable console and made some screenshots and try save s1p or s2p file |
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3 outputs splitter (MX-3000D) use.
As i'm using the NanoVNA-H essentially for HAM bands, i tried to use a 3 outputs splitter (1.6 - 160MHz, 350 - 500MHz and 850 - 1300MHz).
I've done one 2 ports calibration for each output. The measured spectrum for each output is not too bad (far better compared to direct VNA output) and SWR measurements on HF, 6m, 2m , 70cm and 23cm seem to be corrects. I tried to use a little Tera Term macro for direct frequency setting and that's ok too. (By choosing the correct splitter's output!) 73 QRO, Rudi, HB9ARI |
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Re: NanoVNA firmvare, compiled by DiSlord #firmware with MiniSD support
#firmware
On Mon, May 25, 2020 at 12:56 PM, Larry Rothman wrote:
I compile NanoVNA - H firmware vs SD Card support, not tested, i hope it work If you have installed SD card slot on NanoVNA it you can try check work Work as on h4 version vs some limits (not supported exFat filesystem, and not use long filenames, limits from less flash size) Enable console and made some screenshots and try save s1p or s2p file |
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Re: Test do not read
I wrote the test message.
I had made my first post, but I could not see it. I made the second test post to see if that would go through. When I posted the test post, I saw the note that it would be moderated. Then I knew that's why I had not seen my first post it had not went through the moderator yet. I got both posts in my email at the same time. Tell me how to remove it, and I will. Or you can continue to read it and say you didn't ;-) Mikek |
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Re: Definition of terms
Hi,
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A newcomer facing the base of a steep hill probably doesn't know what words to use when asking a question. First would be "how do I turn this thing on?" They probably can look that up for themselves but other questions may not be so easy. I am new to the nanoVNA but came to it with some foggy ideas about what it does and even how. But as with other new ventures, I read the wiki and the how-to and find new words or even old words in a new context. With Google and other search engines we can then look up those new words. that constitutes 'climbing the hill'. I am a radio amateur. I had to learn CW. No..it's not weeping about dropping that requirement. I helped some others working for their license. The ones who actually took the time to learn the Morse code succeeded. I could not *learn* it for them. All we can really do is point to the start of the trail that leads up the hill and the newbie is then welcome to climb as far as they want to go. There may come a fork in the trail and a new pointer can be offered. The people who *know* cannot know for you (newbie). There is a reference to "hands-on" in the thread. I have found that a balanced mix of 'book learning" and hands-on is needed. Newbies should not feel 'dissed' by 'rtfm' if given the page and paragraph number to read. 73, Bill KU8H bark less - wag more On 6/6/20 7:07 AM, gary.sewell@... wrote:
First I want to thank all that responded to to my question. I remember back in my college days in the late 60¡¯s, we used very large Tektronix scopes, and on the top of the scope was a small pop-up compartment that held a small manual. On that manual it stated ¡°RTFM¡±. For those that don¡¯t know what this acronym means, it is ¡°Read The Fu#king Manual¡±. I remember how thick that actual manual was, and it may take hours of searching the manual to find out how to use a function on that scope. So instead we would ask the instructor and they would give you the answer. |
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Re: New user, dove in above my head.
First, I think that you are shorting one side of your balanced input to ground.<Yes, at the very least, to the shield potential of the radio, connecting an earth ground to the radio makes no difference to the common mode signal attenuation. I did not realize the grounding. Yes. measuring the input with a 50 ohm resistor on the output gave me about 92 ohms at 500kHz rising to 109 ohms at 4MHz.. Ah, I will add a 4 to 6 turn transformer at the input and measure again, and I'll wind the second just to measure the loss of the two transformers, divide by two to find the loss of one. Good, I will measure the common mode impedance with that method. Thanks, Mikek |
Jim Shorney
John
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