开云体育

To do the job the best way I would connect a short cable to the SMA and terminate it in whatever series I want, say BNC or N or UHF.? To avoid further stress it might be wise to put the cable end with BNC etc on a small bulkhead that is solidly mounted.? That should alleviate all stress on the vna and would last a long time.
As was said, do calibration after all is in place.
Bob

Kurt - you're not older... you're more 'mature' ;-)



On Mon, 9 Dec 2019 at 7:16 PM, Kurt Poulsen<kurt@...> wrote: Hi Dave
Wonderfull to read such a message. I totally agree
My eyes are 4 year older than yours and the enjoy the lastest AA firmware from Hugen with larger fonts on screen. No problem to read the characters now.
I am also impressed with the low noise floor 40dB at 1500MHz seen on my two Hugen-H devices
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af David Eckhardt
Sendt: 10. december 2019 00:23
Til: NANO VNA <[email protected]>
Cc: David Eckhardt <davearea51a@...>
Emne: [nanovna-users] THE NANOVNA - A COMMENT

All too often we receive criticism for something we have accomplished or completed.? Well, that is not the intention of this email.? My life-long philosophy in such things is that a milligram (choose your unit of measure) of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a., criticism).? So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to the market!!!!!? It is a wonderful tool for the amateur and certainly, based on the emails I read, a motivating tool for learning many of the finer points of RF design and more than just basic SWR.? Guys and gals, well done ! ! ! ! !? What an instrument for all of US $50.? Again, well done........? And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of additional RF and low microwave test gear, mostly HP.? I know how to use these instruments.? But comparing the NANOVNA to the HP 'equivalent' which, in its day, cost 1000X the NANOVNA , you did a bang-up job.? Please continue the efforts and offerings.? It IS appreciated.? And, BTW, the noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and educational tool to the average amateur (and a few EE's who can't even do Ohm's law....).

Dave - W?LEV

PS:? I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish the screen were larger.? Minor criticism as this would add cost.

GIN&PEZ

This looks much better thank you; but please don’t feel rushed on my behalf. I acknowledge that this is a works in progress, and I am working through this in my leisure... a luxury of being retired, but not a legitimate excuse from doing my chores. :-)

--
73

Gary, N3GO

At age 87 I too have vision problems but I don't care.? I have a magnifying glass that serves well.
My store of gear includes two VNAs besides the two nanoVNAs.? I fooled with the latter just to see what it could do.
I measured a batch of capacitors with the nano and, from 2 pF to about 0.5 microfarad, it came within about 1% of the readings I get with my fancy GR bridge.? I am impressed.? (There are some 'tricks' for getting good readings that I might share.)
I get comparable results with resistors and inductors.? I can measure Q and resonant frequency.? I checked a crystal and it was great, showing me the resonance within a very small tolerance.? For what it costs, it can't be matched.? I can measure characteristic impedance, coaxial loss, line length, and more.
So I have two of them just in case, so I won't have to do without if one acts up.
Bob K6DDX On Monday, December 9, 2019, 04:22:27 PM PST, Kurt Poulsen <kurt@...> wrote:

Hi Dave
Wonderfull to read such a message. I totally agree
My eyes are 4 year older than yours and the enjoy the lastest AA firmware from Hugen with larger fonts on screen. No problem to read the characters now.
I am also impressed with the low noise floor 40dB at 1500MHz seen on my two Hugen-H devices
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af David Eckhardt
Sendt: 10. december 2019 00:23
Til: NANO VNA <[email protected]>
Cc: David Eckhardt <davearea51a@...>
Emne: [nanovna-users] THE NANOVNA - A COMMENT

All too often we receive criticism for something we have accomplished or completed.? Well, that is not the intention of this email.? My life-long philosophy in such things is that a milligram (choose your unit of measure) of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a., criticism).? So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to the market!!!!!? It is a wonderful tool for the amateur and certainly, based on the emails I read, a motivating tool for learning many of the finer points of RF design and more than just basic SWR.? Guys and gals, well done ! ! ! ! !? What an instrument for all of US $50.? Again, well done........? And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of additional RF and low microwave test gear, mostly HP.? I know how to use these instruments.? But comparing the NANOVNA to the HP 'equivalent' which, in its day, cost 1000X the NANOVNA , you did a bang-up job.? Please continue the efforts and offerings.? It IS appreciated.? And, BTW, the noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and educational tool to the average amateur (and a few EE's who can't even do Ohm's law....).

Dave - W?LEV

PS:? I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish the screen were larger.? Minor criticism as this would add cost.

Hi Dave
Wonderfull to read such a message. I totally agree
My eyes are 4 year older than yours and the enjoy the lastest AA firmware from Hugen with larger fonts on screen. No problem to read the characters now.
I am also impressed with the low noise floor 40dB at 1500MHz seen on my two Hugen-H devices
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af David Eckhardt
Sendt: 10. december 2019 00:23
Til: NANO VNA <[email protected]>
Cc: David Eckhardt <davearea51a@...>
Emne: [nanovna-users] THE NANOVNA - A COMMENT

All too often we receive criticism for something we have accomplished or completed. Well, that is not the intention of this email. My life-long philosophy in such things is that a milligram (choose your unit of measure) of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a., criticism). So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to the market!!!!! It is a wonderful tool for the amateur and certainly, based on the emails I read, a motivating tool for learning many of the finer points of RF design and more than just basic SWR. Guys and gals, well done ! ! ! ! ! What an instrument for all of US $50. Again, well done........ And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of additional RF and low microwave test gear, mostly HP. I know how to use these instruments. But comparing the NANOVNA to the HP 'equivalent' which, in its day, cost 1000X the NANOVNA , you did a bang-up job. Please continue the efforts and offerings. It IS appreciated. And, BTW, the noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and educational tool to the average amateur (and a few EE's who can't even do Ohm's law....).

Dave - W?LEV

PS: I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish the screen were larger. Minor criticism as this would add cost.

Dave, thank you for a well written and POSITIVE comment. I follow the Reviews section on eHam daily, and there are REALLY folks out there, that would complain about being hung with a new rope!
It's easy to see the 'negative nellies' who bad mouth a new radio (or tool) without not only never having used one, or never even SEEN one! The Icom 9700 is proof of the "drifts like an Iceberg" comment from one old fart that doesn't even have a cellphone and wouldn't have a radio 'with a touch screen if it was given to him" mentality.

I REALLY enjoy both my 2.8" NanoVNA and my 4.3" "F" model.
I have a Rigol SA/TG in the shop, but these little devices are AWESOME!!!

ron
N4UE

All too often we receive criticism for something we have accomplished or
completed. Well, that is not the intention of this email. My life-long
philosophy in such things is that a milligram (choose your unit of measure)
of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a.,
criticism). So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to
the market!!!!! It is a wonderful tool for the amateur and certainly,
based on the emails I read, a motivating tool for learning many of the
finer points of RF design and more than just basic SWR. Guys and gals,
well done ! ! ! ! ! What an instrument for all of US $50. Again, well
done........ And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of
additional RF and low microwave test gear, mostly HP. I know how to use
these instruments. But comparing the NANOVNA to the HP 'equivalent' which,
in its day, cost 1000X the NANOVNA , you did a bang-up job. Please
continue the efforts and offerings. It IS appreciated. And, BTW, the
noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and
educational tool to the average amateur (and a few EE's who can't even do
Ohm's law....).

Dave - W?LEV

PS: I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish
the screen were larger. Minor criticism as this would add cost.

#81" : update : on the physical expression of two-port s-parameters
REF: 9 December 2019 - /g/nanovna-users/message/8065
-
#81' : update : on the physical expression of two-port s-parameters
8 December 2019 - /g/nanovna-users/message/8013
-

Well, regarding o, O, 0, 1 and l appearance : after numerous trials-and-errors,
we dropped the use of [Liberation Mono] and use [Bitstream Vera Sans Mono],
[Bold], [16], [Release: 1.10]:

hi,
please release source code.
i use linux
I forgot virus and antivirus....

Stylus: Cheap plastic 0.5mm "Bic" mechanical pencil, with the lead withdrawn. It even has a nice rubber grip! As a bonus, you can pump the lead out 1 click and take notes! :)
73, --kv5r

Hi Rudi,

Copy everythimg from screenshot. I not lucky, i tried write longer reply from my phone. I lost it 3 times. I will help you if required from my pc.

73,
Lajos

HI Ed,

Have you tried downloading it from this link:


Kind regards,

neb

Hi betex,

Thanks for having interest with the software, I posted the latest version here:
/g/nanovna-users/topic/nanovnapartner_v0_17/67737499?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,67737499

And you can download it from this link:

Kind regards,

neb

Hi neb,

your software looks quite nice, but unfortunately the link has expired...

Could you please upload it again?

Many thanks!
betex

Many thanks for all your answers!

Taking now a 2m cable with ferrites at both ends is working really great!
No more signal-affecting when connecting to USB!! :-))

...and of course it might not be a correct design for a ground plane antenna, I think it is not bad at all...

betex

And check the connectors, not the markings on the cable. I have seen 75 ohm
coax jumpers with 50 ohm BNC connectors on the ends. Such cables are not
recommended if you are using a resonant antenna, but will be just fine if
you are using a non-resonant antenna with an antenna tuner.

On Mon, Dec 9, 2019 at 09:33 AM, QRP RX wrote:

"Just use menu STIMULUS and set STOP = 30 MHZ. After that perform calibration and save to memory cell 0. Thats it. Now it will works to max 30 MHz with no harmonics mode."
=============================================================================

As an addendum to QRP's post, take into consideration that even if operation is limited below 300 MHz where the harmonics mode is used, because the SI5351 does not produce a sinusoidal output - harmonics will still be present in the CH0 output.

Perhaps your biggest gain by limiting your frequency range will be increased frequency resolution because you are using the NanoVNA's 101available measurement points over a shorter frequency span.

- Herb

Just use menu STIMULUS and set STOP = 30 MHZ. After that perform calibration and save to memory cell 0. Thats it.
Now it will works to max 30 MHz with no harmonics mode.

@ Gary O'Neil, N3GO - 9 December 2019
/g/nanovna-users/message/8059

Dear Gary,

No, there is not only the numeral two. There are a lot of ones and small Ls.

But, could you wait a little, please? We will try to improve the appearance of
the text, by using Liberation Mono of appropriate size or whatever else font,
sometime later and we hope that we would finish after two or three hours, at
most.

Best regards,

gin&pez@arg

On Sun, Dec 8, 2019 at 10:46 PM, <pgc1682@...> wrote:

I loaded to Sim Smith Chart your s1p data file.

Hello pgc1682,

Thank you very much for your help with SimSmith.

Unfortunately I cannot follow your explanation.
I have loaded my data file nanoVNA_RG173-30cm_202_500MHz_Open.s1p
in SimSmith, see attached screen shot SimSmith_RG174-30cm_DL5FA.png

Could you please tell me step by step what to do, to achieve your result?

73, Rudi DL5FA