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ive downloaded the reald firmware but there is no hex or dfu file??

Hi, Rune!
I have read your conversation with Bryan WA5VAH about TDR. As I understood, there is a problem with putting the device in TDR Transform mode and back in NanoVNA Saver.
Yesterday I have made measurements of impedance of some coax cables, using NanoVNA built-in TDR. Meniu item - TRANSFORM/LOW PASS STEP. The results were amazing. I supposed that it would be very interesting to see all this pictures on PC screen and to have an abbility to save the results on PC. So, if there is a problem with switching to TDR, maybe it is possible to write some kind of GUI esepecially for TDR measurements? It will be very usefull!
Thanks and 73!
Andy, UA3RAW

This is where radio clubs are handy. I am really surprised at the hidden technical level of some of my club members. They don’t wear a badge or sign showing their skill level. They might even subscribe to QEX. I am sure if club members would ask my club would get a subscription. So, ask around. There may be someone in your club who subscribes to QEX and will loan you his or her copy. I bring year old QSTs and CQ to the club room and throw them on a bench for others to take and read. Or if you have the issue in question donate it to Paul W0RW’s radio lending library. Then others can check it out via mail and enjoy it, even make a copy of the article for their own use. All perfectly legal.

Paul’s lending library. Check it out.

Another thought (flame suit on) How many of us frivolously spend the equivalent of an ARRL membership each year, even on specialty coffee or some other snack treat? I dare to say our bands are worth a lot of money to commercial interests and who else is out there protecting our interests? No ARRL? No frequencies! No hobby! There, I said it.

Dave K8WPE. An ARRL member for 60 years. Even saved my nickels and dimes back in 1960 to be a member.

David J. Wilcox K8WPE’s iPad

It is a pity there are one or two members of the "something for nothing"
set on this forum.
If Dr.Steber wishes to publish his findings in QEX, where he is financially
rewarded, then that is his choice.
Writing technical articles takes considerable time and effort as I know
from personal experience as a contributor to Sprat, the magazine of the
GQRP Club. I receive no remuneration from the GQRP Club and I am happy with
that.
I have been a member of the ARRL for 43 years but cannot afford the extra
cost of QEX. This I accept.
Many years ago, as a postgraduate university student, I wrote a large
dissertation on the development of early radio receivers. The thesis, which
took considerable time and effort, is the property of the university and
myself.
Thank you to all who have freely given their time and energy to the design
and development of the NanoVNA.

Phil G3SES

How does one measure the series resonant frequency of a RF plate choke using a nannovna.

1. Do you put the choke in series between the 2 ports
2. Do you place the choke in parralel to the 2 ports
3. Do you use it as a dip meter with 2 x loose coupling coils on a shorted chokes.

When I used a dip meter i used to short the choke out and couple the dip meter to end of the choke

Thanks

On Sat, Dec 21, 2019 at 07:14 PM, Gary O'Neil wrote:

The important significance of this new algorithm is that it entirely mitigates
the need for an independent multi-term calibration process and/or algorithm.

Gary, I'm do not understand this.
The new formula has been proven to be identical to the well known calibration formula so it seems to be a single formula to describe G=f(g,s,l,o,S,L,O) instead of the formula using G=f(g,a,b,c) where a,b,c are defined using 3 different f(S,L,O,s,l,o)
The advantage of the new formula seems it is elegant. The disadvantage is the computational effort to use it.
Or am I again making a big mistake?


--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

I had the same problem.

Then the replacement screen arrived smashed to pieces.

These idiots have no idea how to pack things for safe transport so hammer it into them when you buy one that it must be packed properly.

One other thing to watch - some displays have the ribbon connector for the touch screen on the wrong side.

I've decided not to bother replacing the screen on mine and will just use it with a computer.

--
Terry VK5TM
( )

#90: On the -Second- Arithmetical Method of Error Estimations in
VNA Measurements
-
REFERENCE:
ann : next-to-come : a practical introduction to errors of "errors"
20 December 2019 - /g/nanovna-users/message/8436

Hello,

Allow us, please, to inform you that after our presentation of
our -First- Analytical Method of VNA Error Estimations Using
Complex Differential Error Regions DERs and Real Differential
Error Intervals DEIs,

- - - - - - (c) gin&pez@arg (cc-by-4.0) 2019 : start - - - - - -

we are just starting our step-by-step presentation of our
-Second- Arithmetical Method of Error Estimations in VNA
Measurements Using Complex Arithmetical Error Regions AERs and
Real Arithmetical Error Intervals AEIs, as they introduced by us
in:

"Measurement Uncertainty in Network Analyzers: Differential
Error Analysis of Error Models - Part 1: Full One-Port
Calibration", FunkTechnikPlus # Journal, Issue 1, Thursday 31
October 2013, p. v4-18, Fig.1 page 20:




[1] excerpt of ftpj:


"Total Differential Errors in One-Port Network Analyzer
Measurements with Application to Antenna Impedance",
Radioengineering, Vol. 16, No. 2, June 2007, p.7, Fig. 7 and
Fig.10:




[2] excerpt of re:


- - - - -

#90.00 : A Practical Introduction to our -Second- Arithmetical
Method of Error Estimations in VNA Measurements : [SAMEEVNAM]

In addition to [1] and [2] above, we also just uploaded our
first SAMoEEiVNAM program, as well as and its results, at:



regrading our [NanoVNA] operation at ~405 MHz, as follows:

[3] Our Maxima Program SAM.20191222.MC:


[4] Its Numerical Results:


[5] A graphical Error Value result of Real Part Rt of Zt withinin its R-DEI:


[6] A graphical Error Value result of Imaginary Part Xt of Zt within its X-DEI:


[7] A graphical Error Value Zt within its Z-DER:


Notably, this SAMoEEiVNAM is most appropriate for Programming.

- - - end : (c) gin&pez@arg (cc-by-4.0) 2019 - - - - - - - - - -

Sincerely,

gin&pez@arg

:#90.00

Hi again Jeff;

Don't you just love it when your comments get posted before you are finished drafting it? :-)

I had only one final comment in my response to you on this...

The important significance of this new algorithm is that it entirely mitigates the need for an independent multi-term calibration process and/or algorithm. The accuracy of the corrected result is determined precisely by the defined accuracy of the standards used. The standards corrections, and measurement uncertainties are embedded and included in every measurement, and utilized by the algorithm to compute the corrected result.

--
73

Gary, N3GO

Hi Jeff;

I agree that the proof is certainly terse as you say. Likely an additional and serendipitous artifact of the elegance of the approach. :-)

The use of ideal -1, 0, and +1 standards in the proof simply serve to define them as ideal. Keep in mind also that all variables are complex values; hence the ideal standards all have imaginary components of zero. While these values can, and in many, if not most, cases will be defined as ideal in practice, it is the objective of calibration to normalize the measured standards to those boundaries. They are and will be set to the value and accuracy defined by the user based on their knowledge of the test standards used in their application, and the accuracy to which they wish to have them defined whether through published manufacturing tolerance specifications, or through elaborate laboratory characterization and comparison to certified industry reference standards.

The defined or "given" values as well as the computed result are upper case, and all lower case variables represent raw data measurements, with G being equal to the corrected reflection coefficient of a DUT exhibiting a measured reflection coefficient of g.

t



--
73

Gary, N3GO

I don't think that has touch capability.Bob

Hmmm. That is indeed interesting.

DaveD

Sent from a small flat thingy

Dr. Steber is one of my favorite authors. He has published easy to follow articles on DIY VNA's and other instruments in QEX magazine and Nuts and Volts magazines over the years. Pretty much all those articles are available for download on the web. Its usually just a matter of waiting for some time after the initial magazine is published before selected articles start to appear.

Entire QEX magazine archives from 1982-2016 have been available at for some years now.

I don't have a subscription to QEX but if there is content that interests me I do purchase individual issues as a way of supporting the author and encouraging him to publish future articles.

- Herb

From: Dave Daniel: Define “common knowledge”.

I would say anything that can be obtained from simply surfing the web.

On the other hand... (Copied from under Fair Use provisions):

In June 2011, Judge Philip Pro of the District of Nevada ruled in Righthaven v. Hoehn that the posting of an entire editorial article from the Las Vegas Review Journal in a comment as part of an online discussion was unarguably fair use. Judge Pro noted that "Noncommercial, nonprofit use is presumptively fair. ... Hoehn posted the Work as part of an online discussion. ... This purpose is consistent with comment, for which 17 U.S.C. § 107 provides fair use protection. ... It is undisputed that Hoehn posted the entire work in his comment on the Website. ... wholesale copying does not preclude a finding of fair use. ... there is no genuine issue of material fact that Hoehn's use of the Work was fair and summary judgment is appropriate." On appeal, the Court of Appeals for the Ninth Circuit ruled that Righthaven did not even have the standing needed to sue Hoehn for copyright infringement in the first place.

73

-Jim
NU0C

On Sat, 21 Dec 2019 17:19:09 -0600
"Jim Shorney" <jshorney@...> wrote:

No, it does not. It covers Fair Use quoting, which is the point.

73

-Jim
NU0C

On Sat, 21 Dec 2019 17:24:01 -0500
"Dave Daniel" <kc0wjn@...> wrote:

But that does not include wide re-publication .

DaveD

Sent from a small flat thingy

On Dec 21, 2019, at 17:10, Jim Shorney <jshorney@...> wrote:


It is allowed as "Fair Use".



"In its most general sense, a fair use is any copying of copyrighted material done for a limited and “transformative” purpose" (fair use of the first sentence of the above web page).

73

-Jim
NU0C


On Sat, 21 Dec 2019 21:07:00 +0000 (UTC)
"Bob Albert via Groups.Io" <bob91343@...> wrote:

Quoting is always at the discretion of the copyright holder. Any part of a copyrighted work is protected.
Bob
On Saturday, December 21, 2019, 12:57:02 PM PST, W5DXP <w5dxp@...> wrote:

Isn't it OK to quote copyrighted articles as long as one credits the source? How about just quoting the parts that are not already common knowledge?

No, it does not. It covers Fair Use quoting, which is the point.

73

-Jim
NU0C

On Sat, 21 Dec 2019 17:24:01 -0500
"Dave Daniel" <kc0wjn@...> wrote:

But that does not include wide re-publication .

DaveD

Sent from a small flat thingy

On Dec 21, 2019, at 17:10, Jim Shorney <jshorney@...> wrote:


It is allowed as "Fair Use".



"In its most general sense, a fair use is any copying of copyrighted material done for a limited and “transformative” purpose" (fair use of the first sentence of the above web page).

73

-Jim
NU0C


On Sat, 21 Dec 2019 21:07:00 +0000 (UTC)
"Bob Albert via Groups.Io" <bob91343@...> wrote:

Quoting is always at the discretion of the copyright holder. Any part of a copyrighted work is protected.
Bob
On Saturday, December 21, 2019, 12:57:02 PM PST, W5DXP <w5dxp@...> wrote:

Isn't it OK to quote copyrighted articles as long as one credits the source? How about just quoting the parts that are not already common knowledge?

One of our members posted a document in the "Filed" section showing his upgrade procedure to a 3.2" screen @ /g/nanovna-users/files/Hardware%20Mods/NanoVNA%20new%203.2%20LCD%20display%20Herman%20ON1BES.pdf .

If you decide to go with a 2.8" replacement screen and have difficulty seeing the screen fonts then you might give hugen's 0.4.0AA firmware a try. It has a larger font size with the main penalty being only 4 memory storage locations instead of 5. See attachment for example display.

- Herb

Many thanks to all for the valuable feedbacks

Will come back once I managed.

At the moment the app runs like a charm, but I prefer to publish it only once completed with the calibration part.

73 de HB9IIU

#89: On the Comparison of our Formulation with that by Erik, PD0EK
-
REFERENCES
[1] 21 December 2019 - /g/nanovna-users/message/8459
[2] 21 December 2019 - /g/nanovna-users/message/8482
-

Hello,

Allow us, please, to announce that we uploaded our results, using our copy of Maxima
64-bit 5.43.0 running under our wxp64p&sp2, from our comparison of our formulation [1]
with that proposed by Erik, PD0EK [2], at:



Also allow us, please, to inform The Common User, who interested enough, that we
also uploaded this Maxima program by us, at:



Sincerely,

gin&pez@arg

#89:

just select the 2nd pic to get the touchscreen version.