开云体育

Tim, I fixed my H4 by slightly loosening the case screws, as suggested in some posts. I shared the success with GigaParts, so they can relate that to other customers. Now I’ll join you on our journey to learn!

73, Les AA5NA

Hi Les,
What did you buy - the H or the H4?
Some of the early H4 units had problems with the housing pressing on the touchscreen.
Loosen the housing (4 screws) and then see if you still have the problem.
There are several threads in the forum and Wiki about this.
Good Luck!

The STM32F303 does not support OTG.

Tim, I got mine from gigaparts this weekend, and it boots up to a copyright screen, and not to a Smith chart. Did your get beyond the copyrights? Tasha Sandlin at Gigaparts told me to go to this forum for help:

Unfortunately we cannot provide you with technical support on this item. The link below may be of some assistance with your questions:

/g/nanovna-users

Thanks. -Les

Dear DisLord,

A quick question, would it be reasonable to support USB pen drive via OTG?

Thanks!

Welcome to the group.
In addition to the above, I also recommend viewing my website.
73, Gyula HA3HZ

--
*** If you are not part of the solution, then you are the problem. ( ) ***

On Mon, 22 Jun 2020 at 14:53, <namerati@...> wrote:

For a small device like the NanoVNA an N connector is simply too bulky.

I have to disagree with that. The extra size would be of no practical
consequence to most people if a NanoVNA was in a larger case suitable for N
connectors. The small size and battery operation makes the unit portable,
but few people use SMA connectors outside. Most people will use an adapter
to SO-239 or N.

While I can see the point of having SMA connectors on the PCB, as soon as
it’s put into a case, I believe N is the only sensible connector type.

A lot of NanoVNAs are going to be used essentially as antenna analyzers,
and for that the unit should have a suitably sized connector.

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

On Sat, Jun 20, 2020 at 07:29:04PM -0700, tardivat@... wrote:

At the end of the day even SMA would be marginal. If you played around with this board frequently you will even wear out SMA connectors. My view is that anything that is used daily should N connectors.

SMA connectors have become a cheap and nasty method of providing "A connector" That wont be reliable in the long term. We now have makes making RF amplifiers and pre-amps with useless SMA connector that require equally useless adapters to bring into the connector world that most of use. It would be far better for HAM and general purpose use that N connectors be used as a standards regardless of the cost, even a cheap N connector would be far more usable than the rubbish SMA connectors that we typical see on mass produced items.

For a small device like the NanoVNA an N connector is simply too bulky.

It's not relevant for NanoVNA frequencies, but SMA connectors offer significantly better microwave performance than N connectors:

I sick and tired of wasting timing making junk measurements because of junk materials, connector and cables.

If you use it daily then it's probably worth spending more than $50 on your network analyzer, an instrument class where price levels 60dB higher would still be considered reasonable!

The Rohde & Schwarz ZVH comes with N connectors and can be had for less than a 50dB increase in price, for example :)

Hi,

Have a look at Alan;s latest videos, they can put you in the right track.
(..invaluable)
->

Also, have a look at group's wiki for all kind of information
-> /g/nanovna-users/wiki

I am a new NanoVNA owner and have received my unit through GigaParts. For a new user who has a device that comes with close to zero instructions the list looks like an incredible resource but is a bit like trying to drink from a fire hose!

Could any one recommend a file, video, or site that is a good first step to this device? I am initially interested in antenna tuning/analysis but eventually want to move on to explore other features.

Tim N9PUZ

Be aware that very few receivers have 50 ohms input impedance on the RECEIVER. Years ago I decided to measure some of my radios and it was an eye opener for me. I always ASSumed that all my ham radios were 50 ohms. I measured between 20 to 200 ohms.

Hallo zusammen,
inzwischen habe ich mir dieses Hilfsmittel angeschafft:
Diesen Hinweis findet man auf der Seite von DG8SAQ: . Es ist ein Bausatz und kostet ca. 23 Euro, aus Gro?britannien, Damit kann ich eigene Schaltungen, Filter, usw. aufbauen und am Nano-VNA testen. Funktioniert gut.
Wolfgang, DK2FQ

On Sun, Jun 21, 2020 at 08:57 PM, Juan Jaramillo wrote:

Hugen,

How often is firmware updates available for general use? Seems to be that
H versions are behind several months.

NanoVNA and NanoVNA-H use some firmwares
See /g/nanovna-users/message/14450

You can use edy555 firmware from
Or you can use my variant from /g/nanovna-users/message/14447

It is recommended that you use the firmware compiled by DiSlord.
/g/nanovna-users/topic/nanovna_firmvare_compiled_by/73181877?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,73181877

Hugen,

How often is firmware updates available for general use? Seems to be that
H versions are behind several months.

On Sun, Jun 21, 2020 at 07:04 PM, <kmillo@...> wrote:

Hi DiSlord,

Any particular reason to have SWR scale using 250m / x value?

V/r,

Normal SWR range is 1 - 3
Y Grid lines on screen = 8

Default scale is = (3 - 1) / 8 = 0.250

You can change trace type, scale, and save after calibration. After load you get them all on display.

You can buy it from R&L Electronics. R&L Electronics is temporarily out of stock, and the next shipment should arrive soon.

Looking at purchasing a NanoVNA H4. Where is the best place to research what the meter will and will not do? Second where is a honest place to purchase one that’s fair and not a knock off? I have been told the NanoVNA is the meter I need for 2m, 70cm and HF. I read a lot of the posts but did not find the information I need. Thank you for your time to respond.

Darrell
N5FTW

Sent from my over-rated IPhone 7 Plus. Any Mis-spellings or grammar errors are due to my IPhone auto correct feature.

No, it's math done on the complex S11 parameter.
73, Carey, WB4HXE

--
Carey Fisher
careyfisher@...

Hi DiSlord,

Any particular reason to have SWR scale using 250m / x value?

V/r,