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Hi

I have with great success made a "portable" 1:9 UNUN and choke solution into a small plastic box like in the picture. I use it for OZ0RF with my RFzero and it was also used by KH8/OZ1RH too. The blue banana socket is where the wire goes and the SO-239 is the counterpoise. The SO-239 can then be used fur a banana plug or spare coax when portable.

The 1:9 UNUN is an Amidon FT114-43 and the choke is an Amidon FT-114-177. I consulted J?rgen, OZ7TA, who has a solid background in designing broadband HF PA commercially. The FT-114 are big enough to handle 25 W even if the SWR is bad. The UNUN ferrite should provide the matching but not dampen the signal. On the other hand the choke ferrite's job is to dampen signals. Both across the desired bandwidth.

Bo

I know engineers who spent many hours trying to find a material that would allow

160M through 6M on the same amplifier.? It is not easy!? As I remember, they settled on type 62.

If you are using hf try type 43.

If you can, get Jerry Sevick's book on the subject.

73

Glen K4KV

On Mon, 13 Jan 2020 at 12:03, Gert Gremmen <cetest@...> wrote:

. It is

difficult to have more than 1:100 in frequency range for a non tuneable
balun, due to non-symmetries in windings and interconnects.

My 1 cents.....

Gert

300 kHz to 67 GHz



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

Gyula,

The PDF is a big help. After reading your previous message, I was scanning the book about NanoVNA via Kindle. Near the end of the book (?) I found a reference to the need for a printer driver; Needed before you could run the VNA to do the things previously described in the book... ;-)

Ah-hA, now I remember. Seems we did that in the early days before most software auto-installed what it needed.

The book made reference to a driver called PuTTY; so I found it and installed it, ran it, but novavna-saver didn't find it! Decided not to pursue it.

Next, I downloaded the ST 32bit driver from your PDF. Installation failed as my PC required a 64bit version. Found an updated version on the STMicroelectronics site and installed it. (VCP_V1.5.0_Setup_W7_x64_64bits.exe). SUCCESS!!

Nanovna-saver found it at COM4 and ran a scan: Useless info as nothing was connected, but it seems to be working now.

Many thanks for your help; I'd have had no idea where to look for the needed driver**. ST also has versions for W8 which were also downloaded. Maybe someone else would have a use for the info. There are 2 versions each in the Zip file, W7 and W8, of 32 and 64 bits.

Again my thanks and Best Regards.

**I tried the Microsoft site but not much help, maybe because Win7 is no longer supported.

I downloaded the kindle manual on my PC...
but I find it very very annoying to read and consult the e-book...probably because I'm a dinosaur, more used to leafing through a book than reading a PC screen...
it would be better to have at least a .pdf printable file...

i2NDT Claudio

Wow, Thanks a lot to all.
I have now a bunch of docs (pdf or docx :-) ) to read and possibly understand to make the best choice for my antenna.

Great

Jean

The nanoVNA Partner program also shows which firmware is on the device. You can also see the Battery voltage. All of this works under Windows XP and can be downloaded here:


73, Gyula HA3HZ

ferrites page with very detailed features can be found here:


PROJECT ENGINEER: WALTER - PE1ABR


73, Gyula HA3HZ

I opted for NanoVNA-H_20191125.dfu not through analysis of the alternatives but simply because it was the latest version and was likely to be better than the old version I had.
Joe

On 1/13/20 11:44 AM, Keith wrote:

Hi David,
Is there any chance that you could convert the Word document to a PDF which would allow the likes of myself to read it.
I don't want to buy a later version of MS Office than the one I use now.

Keith ZL2TPQ

Greetings, Keith:

???? I have attached the file as a PDF.? I don't use Windows, I use the Linux operating system.? In most Linux versions "Print to PDF" is available from all applications: just click Print, then select Print to File, and select the desired file format.? I also don't use MS Office, in fact, I don't use anything at all from Microsoft, and haven't for years.? I use LibreOffice, which will open, edit, and save MS docx files.? Sometimes, the text may not be perfectly formatted when opening docx files in LibreOffice, but it's usually no worse than what you get with different versions of MS Office.? Anyway, LibreOffice also contains an Export to PDF function, and that is what I used to make the attached PDF. LibreOffice is available for free download here:



???? LibreOffice is a complete office suite, and will not only open.docx files, but also xlsx (spreadsheets), .pptx (Powerpoints), and pretty much everything else from MS Office.? It is available for Windows, MacOS, Linux,and probably a few other operating systems.

???? If you don't like paying money for software (who does?), use the free Linux operating system (I use Linux Mint), and all the free software available for it.? (Variously known as "Free", "Libre" or "Open Source."? Developed by the community for the community, and all of it "free as in freedom", and nearly all of it is also "free as in free beer.")? Pretty much any function you do on Windows can be done on Linux, and it's as easy to use and often easier than the expensive stuff.? And most of the applications used on Linux are also available for other operating systems.? 73,

???????????????????????????????????? Jim Allyn, N7JA

Very Well LUCIO ! Really nice job ... Very interesting experience ...

73 Peter I0YLI

Maggie acknowledged my Paypal payment, and told me they needed my phone number (not happy about that).

I sent the number but never heard back...I am waiting patiently.

Glad to know about the Hong Kong thing

73

Glen K4KV

I ordered the NanoVNA-H with PCB 3.4 via e-mail and paid with PayPal as Birdman described above. My payment was sent at the end of the day (in the US) on Friday January 3rd. At about 6:30am on Saturday January 11th I received a text message from DHL informing me that it was on it's way and should be delivered on Tuesday January 14th. I didn't at all mind being awakened with that kind of news. The package actually arrived a day early (today) and everything looks great. In comes in a fancy black box that smells like a new car inside and from my initial experimenting it appears to work great.

Early on I e-mailed Maggie as I was concerned that I had not received a tracking number yet. She got back to me right away and told me that since it had a battery in it they had to send it to Hong Kong and would go out of there on DHL. I don't know all the details of that arrangement but it seemed to work. I have a lot to learn now but it is going to be fun.
73 - Jerry

Problem Solved - Solder Connection
I removed the display unit by carefully lifting it from the left side. It is held down by some "sticky tape." The right side has a printed flex cable that needs to be treated carefully. The display folds up; I took it to about 90 degrees. Where the flex hooks to the green board there were three pins, 16, 17 and 18 that looked "different." I added flux and re-soldered these. Presto, everything works fine. The "touchcal" command now gives totally different answers:
touch cal params: 487 659 145 182
and the touchtest command follows the stylus.

Thanks, hugen, for the offer, but I'm glad to say that all is now well. Two pictures:



Bob W7PUA

here it has been running for 30 minutes without problems. Only at the first start did it give me problems as the start and stop frequencies were set to wrong, arbitrary values. Fixed the start and stop frequencies is working in the background without any problems.


--
*73, Lucio I0LYL Rome, Italy*

On Mon, Jan 13, 2020 at 03:07 PM, Leif M wrote:

" I managed to update the firmware and with 0.54 version."
- Great. That should give you access to the latest firmware features of your choosing and offer better compatibility with the latest software versions. Plus, in the future you can enter DFU mode from the menu instead of needing to jumper the boot pins. After you successfully upgrade once then the apprehension of doing so is pretty much gone.

"Is your list complete, I thought that were more."
- The group member who created the firmware list narrowed it down to the latest versions instead of also including confusing prior versions.

"About the cable length, I wish that the delay from TDR would show also in VNA_saver. It shows now as a screencapture."
- Not quite sure of your meaning. If you mean you would like the cable length in NanoVNA-saver to be displayed as a marker value in units of time and distance, as it is on the NanoVNA TDR screen, then you need to request a feature change to Rune.


- Herb

On Mon, 13 Jan 2020 at 22:12, hwalker <herbwalker2476@...> wrote:

On Mon, Jan 13, 2020 at 01:05 PM, Nels Nelsen wrote:

" … Your review of the QEX article on the nanoVNA is very appreciated .."
===========================================
Thanks Nels! I don't know what the lead time is for magazine
articles, but the NanoVNA's software and firmware had already taken an
incremental leap forward by the time the article was published. The newly
released NanoVNA-H4 was just a thought exercise at the time.

One of our members told me there was nothing in the article our
community didn't already know, but that the article did help to widen the
circle of enthusiasts who are now aware of the NanoVNA.

This group continues to standout as the most referenced source for
current information on the NanoVNA.

- Herb

Thank you. I managed to update the firmware and with 0.54 version too.
Is your list complete, I thought that were more. It looks so simple in the list.
About the cable length, I wish that the delay from TDR would show also in VNA_saver. It shows now as a screencapture.

Aha. Thank you. They were clearly there but I had search a bit.

I am amazed at the lack of awareness in the general tech community of the nanoVNA.? I am also amazed at the apathy I sense when spreading the word to those who could greatly benefit from it.
A couple of friends have purchased them but mostly people seem content not to know about this.? It's been around for years and even I only first discovered it last year.
I have two of them and have some issues with spurious power loss but otherwise am very satisfied.? Still learning.