Hi Paul, Thanks! No problem at all. Yousaf is my last name (it is the Islamic pronunciation of Joseph so normally much more popular as a first name). Confusing when the first and last names both sound like first names! ________________________________ From: [email protected] < [email protected]> on behalf of Paul Kiciak <pkiciak@...> Sent: 02 January 2020 05:54 To: N2PK-VNA <N2PK-VNA@...> Cc: Dave Roberts <dave.roberts@...>; [email protected] < [email protected]>; Makarov, Ivan <miv@...>; bill@... <bill@...>; Tom, DG8SAQ <baier@...>; Ordy, Greg <ordy@...> Subject: Re: [N2PK-VNA] N2PK Website I apologize, Shahbaz, as it seems I guessed wrong before on your first name. HNY, Paul N2PK On Thu, Jan 2, 2020 at 12:29 AM Paul Kiciak <pkiciak@...> wrote: Great idea making HTML versions, Yousaf, and many thanks for your efforts!
HNY,
Paul N2PK
|
Yes, Shabaz, my first thought was 'Joseph' ;>)
Regards,
Paul
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On 1/2/2020 12:59 PM, Shabaz Yousaf shabaz_yousaf@... [N2PK-VNA] wrote:
Hi Paul,
Thanks! No problem at all. Yousaf is my last name (it is the Islamic
pronunciation of Joseph so normally much more popular as a first name).
Confusing when the first and last names both sound like first names!
*From:* [email protected] <[email protected]> ( [email protected] ) on
behalf of Paul Kiciak <pkiciak@...> ( pkiciak@... )
*Sent:* 02 January 2020 05:54
*To:* N2PK-VNA <N2PK-VNA@...> ( N2PK-VNA@... )
*Cc:* Dave Roberts <dave.roberts@...> (
dave.roberts@... ) ; [email protected] <[email protected]> (
[email protected] ) ; Makarov, Ivan <miv@...> ( miv@... ) ;
bill@... <bill@...> ( bill@... ) ; Tom, DG8SAQ <baier@...>
( baier@... ) ; Ordy, Greg <ordy@...> (
ordy@... )
*Subject:* Re: [N2PK-VNA] N2PK Website
I apologize, Shahbaz, as it seems I guessed wrong before on your first
name.
HNY,
Paul N2PK
On Thu, Jan 2, 2020 at 12:29 AM Paul Kiciak <pkiciak@...> (
pkiciak@... ) wrote:
Great idea making HTML versions, Yousaf, and many thanks for your efforts!
HNY,
Paul N2PK
__._,_.___
Posted by: Shabaz Yousaf <shabaz_yousaf@...> (
shabaz_yousaf@... )
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Thank you Paul for a fascinating project. I purchased my USB board set and the BOM some time ago and I have yet to finish the build. The thought that the information will still be accessible in the future should spur my efforts.
Two suggestions:- Anyone making public access to your work or that of the ¡°top team¡± should be encouraged to include the SAME key word as part of their title. This might be ¡°N2PK-VNA¡± for example. This would allow us minions to use a search engines to help if there is no longer a domain for this project.
As part of the credit to the original designer(s), why not put it in a form such as ¡°Harvard¡± standard for references. This would be of particular help to students who may wish to cite material in their dissertations and thesis. This standard is a requirement by many Universities world-wide.
73. Brian 5B4AHW
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On 1/2/2020 6:00 PM, Baier, Thomas wrote:
Hi Paul,
yes, that¡¯s the one. I¡®d love to own the 26GHz version. J
Best regards,
Tom DG8SAQ
*Von:* Paul Kiciak <pkiciak@...> ( pkiciak@... )
*Gesendet:* Donnerstag, 2. Januar 2020 11:35
*An:* Baier, Thomas <Thomas.Baier@...> ( Thomas.Baier@... ) ; [email protected]
; N2PK-VNA <N2PK-VNA@...> ( N2PK-VNA@... )
*Cc:* Makarov, Ivan <miv@...> ( miv@... ) ; Roberts, Dave <dave.roberts@...>
( dave.roberts@... ) ; bill@... ; Ordy, Greg <ordy@...>
( ordy@... )
*Betreff:* Re: AW: N2PK Website
Many thanks for all, Tom, and I presume this is the Keysight USB VNA you
refer to:
<>
(
)
Best Wishes,
Paul N2PK
I'm too old for 26 GHz, Tom ;>) BTW, below is a pix of my latest setup for my USB VNA. This VNA uses 'Reference Mode' and has a two-port solid-state S-parameter Test Set built in. Just got it working with my Microsoft Surface Go which should make for a highly portable setup. Currently the VNA is still powered from either an external battery or a wallwart, but the plan is to permit powering thru the USB port. That's when it will become the most portable. The Surface Go is running Dave's myVNA here. The Surface Go works fine with the pen and an on-screen keyboard when needed. Best Wishes, Paul N2PK
|
Hi Brian,
Re your suggestion for public access, I'm thinking that the info screen at groups and yahoo will
point to Ivan's website after he updates it and maybe Dave can do the same at his.
No clue here on how your 2nd suggestion might be implemented but maybe others know.
73,
Paul N2PK
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On 1/2/2020 11:09 AM, Brian Ray brianray1942@... [N2PK-VNA] wrote: Thank you Paul for a fascinating project. I purchased my USB board set and the BOM some time ago and I have yet to finish the build. The thought that the information will still be accessible in the future should spur my efforts.
Two suggestions:- Anyone making public access to your work or that of the ¡°top team¡± should be encouraged to include the SAME key word as part of their title. This might be ¡°N2PK-VNA¡± for example. This would allow us minions to use a search engines to help if there is no longer a domain for this project.
As part of the credit to the original designer(s), why not put it in a form such as ¡°Harvard¡± standard for references. This would be of particular help to students who may wish to cite material in their dissertations and thesis. This standard is a requirement by many Universities world-wide.
73. Brian 5B4AHW
------------------------------------
Posted by: Brian Ray <brianray1942@...>
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Hi Paul, I can also say thanks for the great N2PK VNA project. It has brought many hours of joy and fun in build it and using it. And improving it. And thanks to all other who also helped, thanks. Roderick Wall, vk3yc. Sent from Mail for Windows 10 From: Paul Kiciak Sent: Thursday, 2 January 2020 11:05 AM To: Dave Roberts Cc: [email protected]; N2PK-VNA; Makarov, Ivan; bill@...; Tom, DG8SAQ; Ordy, Greg Subject: Re: [N2PK-VNA] N2PK Website Many thanks, Dave, but the N2PK VNA would have suffered an early demise had it not been your and Ivan's efforts with respect to adding the USB interface! The same goes for your, Tom's, Greg's, Ian's, and Roger's SW efforts. Re ZIPs, I now have four ZIP files of my website. But the largest is c. 28 MB and presumably too big for emailing. They are present now in the website files but I do not know how to point anyone to them. Can you do so? HNY, Paul N2PK On Wed, Jan 1, 2020 at 5:57 PM Dave Roberts <dave.roberts@...> wrote: Hi Paul
Not possible to overstate how significant to me is your vna design.
Pretty sure I told you but just to repeat for the others on this email, it
was used in the development of the EMV contactless test equipment. The
resulting emv reference kit (aligned using commercial lab VNAs) is used to
type approve the design of every contactless payment card on the planet
including nfc mobile phones used for payment.
Any chance of a zip of the files to save downloading page by page?
Dave
G8KBB
Get Outlook for Android <>
On Wed, Jan 1, 2020 at 5:06 PM +0000, "Paul Kiciak" <pkiciak@...>
wrote:
Hi All,
With the start of the new year, I am seriously considering
discontinuing the N2PK.COM website. Assuming I proceed with this,
it will likely happen shortly after Feb. 1, 2020. The website will
be gone and this will be my only email address.
As I believe I have mentioned before, anyone wanting to save all
of the N2PK.COM content and then re-display it somewhere else can
do so with my agreement as long as that content is credited with
me being its author.
I would appreciate anyone doing this to notify us all on one
and preferably both of these groups.
Many thanks to the MANY people who have supported and improved
the N2PK VNA over the years, in particular: Ivan (VE3IVM),
Dave (G8KBB), Bill (W7AAZ), Harold (W4ZCB - now SK),
Tom (DG8SAQ), Greg (W8WWV), Ian (GM3SEK), and Roger (GM4PMK).
I suspect there are others that I am not recalling and to
those I apologize.
It's been a WONDERFUL experience for me!
Happy New Year,
Paul N2PK
|
N2PK VNA part 1 paper HTML version
Hi Everyone,
The HTML version of the paper is published, these three links below cover the 'part 1' PDF. I'm now working on the part 2 PDF, splitting that out too into multiple shorter pages too.
Once they are all complete, I can add hyperlinks between them all.
Here are the links to the first set:
VNA Measurement Examples:
VNA Theory of Operation:
VNA Performance:
I think the Part 2 will be split into six sections:
VNA Hardware Overview and Schematic
VNA Construction Notes
VNA Power Interface Board
VNA Bridges and Calibration Standards
VNA Master Oscillator
VNA DDS Buffer and Detector Pre-Amplifier
Many thanks,
Shabaz.
|
Hi
I am using the myVNA 1.0.0.95
When I import a any configuration ( transmission, S-Parameters etc )
appears tick also " TDR mode only".
I have to un tick it and everything works properly.
Any explanation ?
Thanks
Regards
IZ2ZNC Gianfranco
|
Hi All,
Ivan has kindly added an archived copy of my now defunct website to his website here:
<>
I have also updated my QRZ page to reflect this.
Stay safe,
Paul
|
Re: N2PK.COM is Now Defunct
Hi Paul,
Any estimate of how many N2PK VNA's were constructed over the years?
Steve, K8JQ
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On 4/14/2020 6:51 AM, Paul Kiciak pkiciak@... [N2PK-VNA] wrote:
Hi All,
Ivan has kindly added an archived copy of my now defunct website
to his
website here:
<> (
)
I have also updated my
QRZ page to reflect this.
Stay safe,
Paul
------------------------------------
Posted by: Paul Kiciak <pkiciak@...> ( pkiciak@... )
------------------------------------
------------------------------------
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Re: N2PK.COM is Now Defunct
Paul,
Thanks for the excellent piece of test equipment. Your groundbreaking work as spawned many designs but your VNA still has tput if piece of quality test equip,emy in the hands of experimenters.
73, Mike N2MS
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On April 14, 2020 at 6:51 AM "Paul Kiciak pkiciak@... [N2PK-VNA]" <N2PK-VNA@...> wrote:
Hi All,
Ivan has kindly added an archived copy of my now defunct website to his
website here:
|
Hi all
I have a problem.
I calibrate in reflection mode, then I apply again the load used to calibrate
and display the Xp.
See enclosed the result, glitches ?
Help
IZ2ZNC Gianfranco
|
3.3V MO regulator odd voltage reading
I've finished a v5.2 board and the VNA seems to be operating properly.? However there was one odd observation that I was hoping someone in the group may have seen before, or have a theory about.
The 3.3V regulator that feeds the CW master osc shows 3.3V **without** the CW MO connected.? With the CW MO connected, the 3.3V terminal reads about 3.55V.? Roughly 0.25V high.
Notes:
1. The voltage tracks the 5V rail.? If the 5V rail is set to 5.1V, the observed voltage is higher yet, about 3.6V.
2. The regulator is not oscillating.? I have measured the voltage at the terminal with 2 HP lab DVM, a fluke, an oscilliscope and a SA.? There is some level of the 156 Mhz present on the +3.3V line, but I'm not sure if that's just being picked up by the near proximity of the oscillator's ajacent output.? I've replaced both the 0.1 & 10 uF caps ajacent the CW osc just for good measure.
3. The VNA seems to work fine with as-expected noise floor levels.
4. While the CW part is a 3.3V nominal, the abs max voltage is 5V so even if the circuit is truly running at 3.55V, the oscillator is probably not in mortal peril.
5. Checks of nearby points show nothing in the 3.55V or 0.25V range.
6. With the +3.3V feed from the regulator pulled, the voltages around the CW osc are all zero.
7. The CW oscillator output is clean and stable.? I can see 2nd/3rd harmonic levels but it looks like it's working fine.
8. Current consumption of the oscillator is about 30 mA which I think is in line with the datasheet values.
At the moment I have no explanation for this.? Hoping someone would have a theory.? Or be able to check their board and see if they have a similar observation on the MO voltage.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
|
Re: 3.3V MO regulator odd voltage reading
Sounds like the gnd terminal of the regulator is floating. Mine behaved normally.
Gary NA6O
|
Re: 3.3V MO regulator odd voltage reading
Thanks Gary.
Unfortunately it shows solid continuity when I test it.
I have replaced the regulator as well - the replacement and the original behaving the same, unfortunately.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
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On 5/14/20 6:52 PM, Gary Johnson wrote: Sounds like the gnd terminal of the regulator is floating. Mine behaved normally.
Gary NA6O
|
Hi
I am wondering whether anyone might have a single detector PCB available. I am looking to update a rather old single detector N2PK VNA to a dual detector for use by a friend.
Thanks.
Bob, 5B4AGN
|
Hello folks,
After many years of great service my N2PK VNA has developed a problem, it acts like it's detectors both have poor sensitivity. Can anyone give me some guidance troubleshooting? Drop me a email and I will try to describe the problem a little better and the steps I have taken. Thanks I sure miss this thing!!
|
Problem with measuring Q's of Caps & Inductors
Hello All,
I haven't posted in years but I need your help now.
The hardware is a single detector board with Pauls original
coupler board unmodified. The software I'm using is MyVNA
version 1.0.0.54 on an XP machine.
Problem. I think I'm having problem measuring the correct Q
of good Caps and Inductors, I never seem to measure a Q
greater than 200. Vacuum Cap or inductors wound on PVC forms.
Why is that? Is this to be expected with the original coupler board?
Should I be using the wider bandwidth RF-IV sensor PCB for
measuring higher impedance parts?
Thanks for your time,
Dave - wb9own
|
Re: Problem with measuring Q's of Caps & Inductors
Dave, It might seem like heresy but I would recommend that you download the software that runs the DG8SAQ VNWA. /g/VNWA/files/A1%20DG8SAQ//VNWA36.7.9.8.zip It will also control the N2PK VNA and is extremely powerful.? Then investigate the amazing documents written by Kurt, OZ7OU.? One in particular: How to Measure the Resonant Frequency and Q of an Air Coil might be helpful.?? I don't know whether this will make it through but it's attached. Wes? N7WS
On Wednesday, July 22, 2020, 9:44:10 AM MST, David Garnier <dsgarnier@...> wrote:
Hello All,
I haven't posted in years but I need your help now.
The hardware is a single detector board with Pauls original
coupler board unmodified.? The software I'm using is MyVNA
version 1.0.0.54 on an XP machine.
Problem.? I think I'm having problem measuring the correct Q
of good Caps and Inductors, I never seem to measure a Q
greater than 200.? Vacuum Cap or inductors wound on PVC forms.
Why is that?? Is this to be expected with the original coupler board??
Should I be using the wider bandwidth RF-IV sensor PCB for
measuring higher impedance parts?
Thanks for your time,
Dave - wb9own
|
Re: Problem with measuring Q's of Capacitors
Greetings
Q can be derived for either L or C by measuring their complex impedance .? In either case Q is a ratio of the real to imaginary values provided by the VNA.? I have recently spent considerable hobby time using my N2PK VNA to derive equivalent series resistance (ESR) of high quality fixed? capacitors.
My bottom line is that accurate measurement becomes increasingly challenging for capacitors with values less than 100 pF and at frequencies below 10MHz or above 100MHz
One academic study bluntly concluded that a? VNA is unsuited to the task and several manufactures use other measurement instruments.
I have a 6-page summary of my efforts, let me know if you would like a copy if anyone
73 Ron W6WO
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On 7/22/2020 9:44 AM, David Garnier wrote: Hello All,
I haven't posted in years but I need your help now.
The hardware is a single detector board with Pauls original
coupler board unmodified. The software I'm using is MyVNA
version 1.0.0.54 on an XP machine.
Problem. I think I'm having problem measuring the correct Q
of good Caps and Inductors, I never seem to measure a Q
greater than 200. Vacuum Cap or inductors wound on PVC forms.
Why is that? Is this to be expected with the original coupler board?
Should I be using the wider bandwidth RF-IV sensor PCB for
measuring higher impedance parts?
Thanks for your time,
Dave - wb9own
|
Wes Stewart