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Usinf the NanoVNA-H4 to identify ferrite cores
Good afternoon. I am not sure but I don't think I have seen this mentioned as yet another tool for the NanoVNA. Can the Nano be used to help identify anything about any of the cores that are sold by
By Fred Moore · #28630 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
By Richard Spohn · #28629 ·
Re: Where to buy Genuine Nanovna
https://www.aliexpress.com/item/3256802604502459.html?spm=a2g0o.order_list.0.0.528a1802THkbTs Sent from Mail for Windows Sent: Thursday, June 30, 2022 12:14 PM To: [email protected] Subject: Re:
By murphy brown · #28628 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
Well my original goal was to determine if it was safe to use both antennas at the same time (one TX- one RX) on two different radios. I can see that would not be wise. Thanks for all the help. Can't
By Marv <m207365@...> · #28627 ·
Re: Where to buy Genuine Nanovna
r and l electronice
By [email protected] · #28626 ·
Re: Where to buy Genuine Nanovna
It appears you are in Australia and I have not heard of any dealers there that sell genuine Hugen H4 units. I would suggest you order directly from Hugen's Zeenko store in China. Yo can get courier
By Roger Need · #28625 ·
Re: Where to buy Genuine Nanovna
What do the creators recommend? Well, they list all that on their web sites. First link is NanoVNA, 2nd link is NanoVNA V2 https://nanovna.com/?page_id=121 https://nanorfe.com/nanovna-v2.html -- Tate
By WyoHam · #28624 ·
Re: Where to buy Genuine Nanovna
The Nanovna website has some suggestions. Look for "Buy a NanoVNA" in the contents list. https://nanovna.com/
By Russ · #28623 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
Much more than +64 dBm and you are very close to digital saturation on the A/D. Personally, I wouldn't go there without at least a 20 dB attenuator inline. Of course, that will also decrease your
By W0LEV · #28622 ·
Where to buy Genuine Nanovna
Hi all, it¡¯s been a while since I followed this group but perhaps somebody can suggest the best place to buy a genuine Hugen NANOVNA. H4 Any help greatly appreciated Thanks Wayne. VK6EH
By Wayne Johnson · #28621 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
Hi Marv, The previous reply showed you that the signal level in the second antenna would be -9 dBm. Normal signal level calibration for a receiver is a S9 signal is 50 microvolts at the antenna, in
By wa1jxr · #28620 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
Hello Marv, I can tell by reading your question that some of your understanding of how the Nano VNA works is not clear. First the Nano VNA has two connectors they are referred to as Channel0 and
By wa1jxr · #28619 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
Thanks - that's exactly what I was looking for. Now I need to figure out how something like 1/10th milliwatt coming in on my ICOM IC-7300 receiver's front-end relates to its specs. Its sensitivity is
By Marv <m207365@...> · #28618 ·
Re: How to measure induced coupling RF between two antennas #measurement #nanovna-h4
That would be 25 Watts minus 53 dB. 25 watts is 44 dBm 44 - 53 = -9 dBm? ?Or about? 1/10th milliwatt Now you know why they like to keep the loops REAL close for inductive charging. Kent WA5VJB
By KENT BRITAIN · #28617 ·
How to measure induced coupling RF between two antennas #measurement #nanovna-h4
I am trying to use my NanoVNA-H to see how much near-field coupling I have between two antennas in my backyard that are about 10 feet apart. I have one antenna connected to the S11 port and the other
By Marv <m207365@...> · #28616 ·
Re: sd card - fail write
In one of these threads someone mentioned the special SD formatting app that you can download for free, and in cases where you get strange behaviour you can always try that. An SD card appears as at
By VE3WNA John <john.verne@...> · #28615 ·
Re: Calibration of H4
We had an in-depth discussion on this subject a few months ago in this group.... /g/nanovna-users/topic/90696010#27854 Roger
By Roger Need · #28614 ·
Re: sd card - fail write
I had a write fail using a 16MB SanDisk, "properly formatted." Right. A few days ago I received and tried the 16MB Patriot. It saved instantly, and without having to format it. NanoVNA-H
By gfmucci · #28613 ·
Re: Calibration of H4
Hi I asked myself the same question as you. Obviously not: it is not necessary to calibrate the box before. You do with Calibration from nanovna-saver. I'm not smart enough to have known how to use
By F1AMM <18471@...> · #28612 ·
Calibration of H4
I could not find any threads that answered this question so here goes. I have seen a lot of videos of calibration of Nanovna using the Saver program, some show calibration only in the program itself
By Mike McKinney · #28611 ·