The Jan-Feb 2020 Issue of the ARRL QEX magazine has a cover story on the NanoVNA by Dr. George Steber:
"Dr. George R. Steber, WB9LVI, reviews a tiny vector network analyzer (VNA) introduced for about US$50 and compares its capabilities with full-featured lab grade analyzers that cost thousands of dollars. An RF VNA is the instrument of choice for measuring the electrical parameters of antennas, components, filters and more. Dr. Steber describes his experiences with the tiny VNA, termed a NanoVNA. He begins with a short description of some technical specifications, and relates how he acquired the NanoVNA. He then includes historical details on the evolution of the product. Next, he describes the general architecture of the instrument, and finally he describes the operation of the unit and including examples."
- Herb
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Re: errors of "error" models
#87: The 5 Main Points in the First Introduction of an Automatic VNA System - REF : #85: On the Formation of a Virtual Port - 15 December 2019 : /g/nanovna-users/message/8237In "An Automatic Network Analyzer System", Microwave Journal, May 1968, p.46 the 5 main points have as follows: but the scaring "nontouching loop rule" mentioned in number 4 is redundant. gin&pez@arg :87#
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Re: errors of "error" models
@Gary O'Neil, N3GO : 19 December 2019 : /g/nanovna-users/message/8399Dear Gary, [pdf]=>[pdf-xchange-2.5.322.10]:[export-to-image]:[png][300x300-true-color-24 bpp]:[8-pages]=>[cdware][*]:[psp5.0.3]:[sharpen-more][resize:50%][grey-scale] [decrease:16][optimized-nearest][brightness/contrast:0/18]=>[8-images]=>[pdf- -shaper-9.6]:[image-to-pdf][fit-to-page(keep...)]=>[pdf:of-reduced-size]=>[pdf- xchange-2.5.322.10]:[ocr][preserve][medium]=>[pdf:of-reduced-size-with-search] [*] cdware : A Classification of Ware Types : - done - sent - Best regards, gin&pez@arg
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looks like messages got mixed up there.
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Re: Strange readings on my modded vna.
well i made the case for it from copperclad board,stripped it,made sure the copper wasnt shorting the outer of the sma conectors together,a min later one fell off,resoldered it now it seems ok so far,cheers all 73 paul.
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Re: First PCB pictures of the V2
In my opinium, the on/off and the jog switch can better be swapped.
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Re: Strange readings on my modded vna.
On Thu, 19 Dec 2019 at 09:11, <nanovnauser@...> wrote: no ideas on this then folks? It¡¯s impossible to work out what you have done from your description, so I have no idea. Dave. -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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Hi Nanovnauser USB socket ??. The delay is part of the onscreen menu by selection "Display" then "Scale" then "Electrical Delay" Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af nanovnauser@... Sendt: 19. december 2019 21:25 Til: [email protected]Emne: Re: [nanovna-users] problems just wondering how you charge it without the usb socket?
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just wondering how you charge it without the usb socket?
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Re: Strange readings on my modded vna.
sorry about all the caps,didnt realise untill i had hit the post tab,didnt mean to be rude.
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Re: Strange readings on my modded vna.
Hi NanoVNAuser Out of the box it is 0 Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af nanovnauser@... Sendt: 19. december 2019 14:51 Til: [email protected]Emne: Re: [nanovna-users] Strange readings on my modded vna. tHANKS KURT,WHAT SHOULD THE DELAY BE OUT OF THE BOX?,AS IVE MESSED WITH MINE BEFORE,I CAN SET IT TO ORIGINAL AND WORK FROM THERE,I DIDNT MALE A NOTE BEFORE I CHANGED IT! 73 pAUL
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Yes I would like to know how to upgrade the firmware.? I know there is a dongle from ST that will do it.? This nano has had the USB connector removed.? I would like to solder it back but it's too small, beyond my soldering skills.? I have the tools but not good enough hand stability and vision acuity.
Anyone who could help is welcome to try.
Bob
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On Thursday, December 19, 2019, 01:14:13 AM PST, Gyula Molnar <gyula.ha3hz@...> wrote:
Hi Bob,
It is true that when one has several hours, one does not know the exact time.
Anyone with multiple VNAs doesn't know which one is accurate - maybe because everything is relative?? :-) :-) :-)
(Although mass production works, there are still differences in the side-by-side product.)
73, Gyula HA3HZ
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Re: First PCB pictures of the V2
Gabriel. change of screen rotation is just a trivial edit of one line in the setup section of the code.
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Re: Strange readings on my modded vna.
tHANKS KURT,WHAT SHOULD THE DELAY BE OUT OF THE BOX?,AS IVE MESSED WITH MINE BEFORE,I CAN SET IT TO ORIGINAL AND WORK FROM THERE,I DIDNT MALE A NOTE BEFORE I CHANGED IT! 73 pAUL
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Re: First PCB pictures of the V2
From some hobbyist market sales I've been involved with, at least in the U.S. the second psychological price barrier is $100 -- three digits tends to scare people off.? (The first barrier seems to be $25 or so; below that, it's thought of as an impulse purchase).? Personally, I'd think $80 or $90 would not be a problem given the extra value of the larger screen.
John
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On Dec 19, 2019, 12:09 AM, at 12:09 AM, Gabriel Tenma White <owowowowo123@...> wrote: "The success of the NanoVNA-F indicates that packaging and display size
are a primary motivator for a lot of buyers"
Market analysis shows the -F has about 1/10th of the sales volume as
the -H, so I would say price is a primary motivator for most buyers,
unfortunately ;)
Still I agree that most users do want a larger screen, it's just a
matter of not also hiking the cost too much. I think it might be
possible to offer the 4'' V2 at around $80 or so, but can't make
promises yet (pricing and marketing is not my job).
SPI interface: yes, since the LCD is easy to unplug we are also
considering using that connector for daughterboards. There isn't much
space for another pin header and branching out the high speed SPI lines
will mess with signal integrity.
Hugen isn't related to us. But I'm really interested in his plans for
V2/3GHz ;)
no-display version: yes, V2 Lite will be a tiny, USB-only 3GHz VNA, at
an extreme price (aiming for $20 retail). It's currently one-port but
we are considering adding port 2 if the cost ceiling can be maintained.
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Hi, Mike Thanks for the advice, and I will take this on board. I have a general dimensioned drawing of one, and I think when I start looking at possible design¡¯s, I would ask our members to download this drawing I have found, and ask them to check it and amend against the ones they hold. Thankyou for that and defiantly taken on board. 73, Talk soon Les ¨C M0LPB Sent from Mail ( ) for Windows 10 *From:* Mike Brown ( mbmail@... ) *Sent:* 19 December 2019 11:36 *To:* [email protected]*Subject:* Re: [nanovna-users] Cases FWIW I haven't printed hagster's design but have printed cases for my two NanoVNAs and one for a friend, based on the design by VK5ZBR. Unfortunately every one had to be different due to physical differences between the three VNAs and from VK5ZBR's. This is presumably why there seem to be no commercial cases for NanoVNAs. The exact position of the SMA connectors and their spacing, together with the USB position can be different from clone to clone. There can also be quite a difference in thickness and screw positions too. Some issues can be sorted by filing but I found I needed to increase the height of the top slightly for two of the clones. 73 Mike
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FWIW I haven't printed hagster's design but have printed cases for my two NanoVNAs and one for a friend, based on the design by VK5ZBR. Unfortunately every one had to be different due to physical differences between the three VNAs and from VK5ZBR's. This is presumably why there seem to be no commercial cases for NanoVNAs. The exact position of the SMA connectors and their spacing, together with the USB position can be different from clone to clone. There can also be quite a difference in thickness and screw positions too. Some issues can be sorted by filing but I found I needed to increase the height of the top slightly for two of the clones. 73 Mike
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Re: Strange readings on my modded vna.
Hi NanoVNAuser Yuo explanation is not very clear and picture a bit fuzzy. But iyt might be you need to introduce a delay via Display/Scale/Electrical delay Kind regard Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af nanovnauser@... Sendt: 19. december 2019 10:11 Til: [email protected]Emne: Re: [nanovna-users] Strange readings on my modded vna. no ideas on this then folks?
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Re: First PCB pictures of the V2
I have to agree with this, I have a NanoVNA-F and I use it a lot more than the smaller model purely because I can see it. I would be happy to pay extra for a bigger display and as a consequence a bigger battery. I do not know how many units you need to sell and at what profit to make any project viable but a 3GHz VNA 5 inch display would be worth $180-200. I think that you can sell several hundred units at that price point. People with disposable income in this hobby tend to be older and tend to have failing eyesight. A big display is very important. Regards Conrad PA5Y ________________________________ From: [email protected] < [email protected]> on behalf of Dr. David Kirkby, Kirkby Microwave Ltd via Groups.Io <drkirkby@...> Sent: 17 December 2019 23:43 To: nanovna-users < [email protected]> Subject: Re: [nanovna-users] First PCB pictures of the V2 On Tue, 17 Dec 2019 at 20:45, hwalker <herbwalker2476@...> wrote: On Tue, Dec 17, 2019 at 10:40 AM, Dale Parfitt wrote:
Thank you Herb, So much traffic, I missed the specs.
====================================================
Dale,
I'd like to add a correction regarding the display size:
Gabriel indicated in her previous message that a working proto-type is
already available using a 3.2" ILI9341 display. A 4" ST7796S display is
being evaluated as an option by menu-driven switchover. Her team will
make a decision about whether to offer two versions for sale.
I would also like to add my voice to the many that would want to purchase this with a larger screen. How does the larger screen you may or may note use compare with the 4.3" on the NanoVNA-F? The 4.3" of the -F is more attractive than 4" for obvious reasons, but how about pixel count, and other technical features about the screen. I don't know if I'm unusual, but for me, the screen is more important than the pure performance, as great performance is no use if you can't see the blinking thing. Of course, if you are going to use it in a lab, with a PC interface, the screen is pretty irrelevant. But there seem to be enough people wanting a decent screen. The 6.5" on my iPhone XS max would be nice. Ouch, that phone was ?1250, so it's not a fair comparison! But seriously, size matters. ?????
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Re: Strange readings on my modded vna.
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gin&pez@arg
Dr. David Kirkby, Kirkby Microwave Ltd
Kurt Poulsen
Les Brown