just wondering how you charge it without the usb socket?
|
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.
|
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
|
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
toggle quoted message
Show quoted text
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
|
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.
|
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
|
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
toggle quoted message
Show quoted text
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.
|
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
|
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
|
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?
|
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. ?????
|
Re: Strange readings on my modded vna.
|
Hi Bob, a general point: Some (early?) firmware versions for the NanoVNA "only" allowed operation up to 900 MHz. I suspect you have one of those - and that you will need to upgrade your firmware in order to get it working in the 900-1500 MHz span. In general: Upgrading to a newer firmware will probably also give you higher accuracy, as some improvements were made to the way the measurements were handled in the firmware. More knowledgeable list members can elaborate on this, I'm sure. -- Rune / 5Q5R On Thu, 19 Dec 2019 at 03:16, Bob Albert via Groups.Io <bob91343= [email protected]> wrote: I have two nanoVNAs each with a different problem.
One refuses to accept any frequency above 900 MHz. I think I have had
that aspect working before but now am not so sure.
The other gives me a bad display on Smith chart, with the open circuit
near the middle rather than at the left. This one for sure worked fine
before.
Is there some kind of basic reset that can restore operation on the second
one, at least? The usual menu option RESET doesn't do it.
|
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
|
Re: Strange readings on my modded vna.
no ideas on this then folks?
|
Re: First PCB pictures of the V2
Without display user define sweep points useful. Raw data also interesting or/and better calibration model on instrument. Currently no way to define precision oslt model on nanova. Many times coaxial line not easy compensate. Bluetooth or better wifi interface will be very useful. Display not required. Strong case with tab to support cord on mount + battery useful and two port. Output is sine wave or square wave?
|
Re: conecting to a homebrew hf verticle antenna
|
Re: First PCB pictures of the V2
The firmware can be configured for up to 201 points, but there are still a few minor UI glitches we need to fix before this can be advertised. Sweep rate is by default 100 points/s, and this is what the plots shown above are taken at, but this can be adjusted in code to trade off noise vs speed. However V2 always shows new data in realtime as the sweep progresses (I'll maybe post a video if my internet speed allows) rather than a screen update every full sweep, so in practice it feels faster. There is a caveat though which is that the first sweep after changing frequency limits is always slower, because it has to do various internal corrections (see firmware code for details). In USB mode this means it's not advisable to do "segmented sweep", but there isn't a need because up to 1024 frequency points are supported in USB mode. This is all mainly capped by device RAM. Firmware is at:
|
Re: errors of "error" models
#86": Two Notes On #86': UPGRADE : On the Results of Measuring Two-Ports Using Only [NanoVNA] Channel [CH0] or a [LeastVNA] 16 December 2019 - /g/nanovna-users/message/8278Note 1 At the paragraph (1) of the above, the "the usual form of { -1, 0, +1 }" must be corrected and/or understood as follows: "the usual form of { (-1, 0) , (0, 0) , (+1, 0) } ordered pairs of values in Cartesian form" in accordance with the remarks made at: #73': On the sine qua non Core Uncertainty of AnyVNA - incl. NanoVNA - System 6 November 2019 - /g/nanovna-users/message/6529Note 2 At paragraph (3) of the above -as well as in general- "The Common User" may have a control on these matters, but only in the extent and depth that is permitted by the manufacturer, who makes available any related information to him. gin&pez@arg :86"#
|
Re: errors of "error" models
@Gary O'Neil, N3GO - 18 December 2019 /g/nanovna-users/message/8386Dear Gary, Thank you for the interesting suggestions. We will prepare and send you two copies - the one with colored underlined highlights. Best regards, gin&pez@arg
|
Kurt Poulsen
Les Brown
Gyula Molnar
OwO
gin&pez@arg