Re: PROCEDURES for MEASURING DM LOSS and CM ATTENUATION of CMCs
Great work Dave.
Thanks for your continuing contribution to our great hobby.
Do you have in your stash a piece on conversion of dB attenuation to Zs= Rs + Xs ?
73,
Ed McCann
AG6CX
|
Larry, what folder should I look in? I see a couple files from you but am missing a modified EXE file....
toggle quoted message
Show quoted text
On Feb 7, 2021, at 4:17 PM, Larry Rothman <nlroth@...> wrote:
?You saved the device few to the same name as the new fw... you've overwritten it.
Read the wiki about defuse and grab my modified exe.in the files section with better naming of commands.
Also, grab a new copy of fw out.of the archives and delete you prev one
Sent from Rogers Yahoo Mail on Android
On Sun., 7 Feb. 2021 at 3:43 p.m., Jamie WW3S<ww3s@...> wrote: I did do the verify, it says its loaded.....but whn I go to config, to
the splash screen, it says 0.5.0.....is that display a hardware or
firmware version?
------ Original Message ------
From: "DiSlord" <dislordlive@...>
To: [email protected]
Sent: 2/7/2021 3:36:39 PM
Subject: Re: [nanovna-users] upgrading firmware?
I think you use Upload Action button (this mean read firmware from device and store to selected file), check file size - should be 128k
Need use Upgrade oe Verify Action buttons, select choose... and select firmware (unpack again it from archive, i think you rewrite it by downloading from device). After use Upgrade button.
|
CMC MEASUREMENTS - PDF'ed & SIZE REDUCED
On encouragement from a few posters, I have updated my construction and
measurements of quite a number of CMCs.
My hope and goal in all this is to encourage others to construct something
simple which can greatly reduce coupling of local RFI into the receive path
of their amateur stations and keep the feedline from radiating from their
antennas. I'd also encourage the group to build and use their NANOs.
Hopefully this and the procedures I previously posted will accomplish some
small amount of home brewing and satisfaction of having done it all
yourself - with good measurements thanks to the folks who made the NANOs
possible.
Please have a look at the attachment.
Dave - W?LEV
|
You saved the device few to the same name as the new fw... you've overwritten it.?
Read the wiki about defuse and grab my modified exe.in the files section with better naming of commands.?
Also, grab a new copy of fw out.of the archives and delete you prev one
Sent from Rogers Yahoo Mail on Android
On Sun., 7 Feb. 2021 at 3:43 p.m., Jamie WW3S<ww3s@...> wrote: I did do the verify, it says its loaded.....but whn I go to config, to
the splash screen, it says 0.5.0.....is that display a hardware or
firmware version?
toggle quoted message
Show quoted text
------ Original Message ------ From: "DiSlord" <dislordlive@...> To: [email protected]Sent: 2/7/2021 3:36:39 PM Subject: Re: [nanovna-users] upgrading firmware? I think you use Upload Action button (this mean read firmware from device and store to selected file), check file size - should be 128k
Need use Upgrade oe Verify Action buttons, select choose... and select firmware (unpack again it from archive, i think you rewrite it by downloading from device). After use Upgrade button.
|
I did do the verify, it says its loaded.....but whn I go to config, to the splash screen, it says 0.5.0.....is that display a hardware or firmware version?
toggle quoted message
Show quoted text
------ Original Message ------ From: "DiSlord" <dislordlive@...> To: [email protected]Sent: 2/7/2021 3:36:39 PM Subject: Re: [nanovna-users] upgrading firmware? I think you use Upload Action button (this mean read firmware from device and store to selected file), check file size - should be 128k
Need use Upgrade oe Verify Action buttons, select choose... and select firmware (unpack again it from archive, i think you rewrite it by downloading from device). After use Upgrade button.
|
I think you use Upload Action button (this mean read firmware from device and store to selected file), check file size - should be 128k
Need use Upgrade oe Verify Action buttons, select choose... and select firmware (unpack again it from archive, i think you rewrite it by downloading from device). After use Upgrade button.
|
I have a NanoVNA-H4, edy555 design, it says I have version 0.5.0 Feb 21-2020. I downloaded v1.0.39.rar, extracted it using 7 zip, am running the DfuSE demo softwate, I place the unit in DFU mode by pressing the multiswtich down while turning on. the software recognizes the device, I chose the extracted dfu file from the Upload Verify section. I chose upgrade.....it erases, then uploads, but when I restart the nano, its still version 0.5.0....what am I doing wrong?
|
Re: How to find the right ferrite toroid for a receiving antenna balun?
On Mon, Jan 13, 2020 at 06:06 AM, <ptapon@...> wrote:
I'm, for now, interested in HF bands with, for now, a long wire.
I'm therefore aiming for a 9:1 balun.
This is pretty late in the game, but it also depends on your receiver. Ham radio equipment is (usually) designed for 50 ohms, but SWL type radios typically had higher impedance antenna inputs. Are you sure you really need a transformer (you're describing a transformer, not a balun - as has already been mentioned). -- Doug, K8RFT
|
Re: MORE CMC SINGLE CORE DATA
Hi,? Dan,
My experience with the 240-31 core with 14 T RG 303 gives me ~7K at 160, >13K on 80/40, slowly rolling off to >4 K at 28 MHz Still >5 K on 12 .
Mel, K6KBE
toggle quoted message
Show quoted text
On Sunday, February 7, 2021, 10:53:04 AM PST, Dan Schaefer W3BU <clancy.987@...> wrote: Don Still curious about the 5k across 10 to 160? Been reading the mail and has been fun but it isn¡¯t obvious to me you get 5k across the whole band?? When you get time it might be fun to discuss your definitions for the 5k. Have been enjoying the discussion threads but currently a bit time limited to engage. Enjoy.? Dan.? W3BU On Jan 17, 2021, at 9:49 AM, Don - KM4UDX <dontAy155@...> wrote:
groups.io/g/nanovna-users/wiki
-=-=-
|
Re: loading .rar firmware
Hi,
I run Linux and I have for decades now. I right click on the rar files and in the popup menu is "extract" and "extract here". Not to start an OS battle but other operating systems may have made it that easy by now maybe depending on versions. Before anybody takes extraordinary or heroic steps, give that a try first. In the fire service we tried the door to see if it was unlocked before we broke it down:)
73,
Bill? KU8H
toggle quoted message
Show quoted text
On 2/7/21 10:31 AM, Chuck Cole wrote: RAR is an alternative to ZIP. There are several free tools that will
handle them. "7-zip" seemed the least atrocious to me. I try to avoid the
fads for compression tools in favor of 1) STANDARDS, and 2) Open source.
The compression advantages are small and the nuisances are big.
Chuck
On Sun, Feb 7, 2021 at 10:06 AM Jamie WW3S <ww3s@...> wrote:
Are there instructions somewhere on how to load the .rar files? I found
them for the DFU files, but the firmware appears to be in the RAR
format.....
|
Re: MORE CMC SINGLE CORE DATA
Don
Still curious about the 5k across 10 to 160?
Been reading the mail and has been fun but it isn¡¯t obvious to me you get 5k across the whole band? When you get time it might be fun to discuss your definitions for the 5k.
Have been enjoying the discussion threads but currently a bit time limited to engage.
Enjoy.
Dan. W3BU
toggle quoted message
Show quoted text
On Jan 17, 2021, at 9:49 AM, Don - KM4UDX <dontAy155@...> wrote:
groups.io/g/nanovna-users/wiki
-=-=-
|
In answering the 'accuracy' question, error bars must be considered.
Evidently error analysis and calculus of variations is no longer taught in
the schools. They both were part of the advanced physics labs I took some
50 years ago.
Dave - W?LEV
toggle quoted message
Show quoted text
On Sun, Feb 7, 2021 at 2:08 AM Scotty Hicks <Scotty@...> wrote: Ah, Confucius say man with two watches don¡¯t know what time it is.
On Feb 6, 2021, at 4:32 PM, Ron C via groups.io <ronsampservice= [email protected]> wrote:
?Gyula HA3HZ,
I read somewhere that A man with a clock always knows what time it
is.
A man with two or three clocks can never be sure.....................
So in review, I'd say that you're right on the money!
Ron
WRKM750
--
*Dave - W?LEV*
*Just Let Darwin Work*
|
Re: Can't get nanovna-saver to run
Ken, you may find /g/nanovna-users/files/Nano%20VNA%20Saver/nanoVNA-H4%20software%20support%20under%20Ubuntu.pdf to be useful. It explains how to set up a Python virtual environment (PVE), effectively an isolated Python install that runs independently of the main system's Python. The PVE sounds complicated, but is quite quick to set up if following instructions *exactly*. Essentially you can run different versions of Python, even different configurations of the same version of Python, quite independently of one another. The instructions on Github are not written from the point of view of a na?ve user. The document in the files area is built on other people's work, and is "obvious", but only *after* one has researched the solution! You may well need the PVE solution even on Ubuntu &c. 20.04. HTH, 73, Stay Safe, Robin, G8DQX
On 06/02/2021 23:35, ken WA2MZE wrote: I downloaded nanovna-saver from github and tried to run the program under kubuntu (ubuntu).
python3.7 nanovna-saver.py
Traceback (most recent call last):
File "nanovna-saver.py", line 21, in <module>
from NanoVNASaver.__main__ import main
File "/home/ken/RadioStuff/VNA/NanoVNA/nanovna-saver/NanoVNASaver/__main__.py", line 33, in <module>
from PyQt5 import QtWidgets, QtCore
ImportError: cannot import name 'QtWidgets' from 'PyQt5' (/usr/lib/python3/dist-packages/PyQt5/__init__.py)
I'm no python expert, not sure how to solve this. Looks like some package is missing.
|
Re: loading .rar firmware
RAR is an alternative to ZIP. There are several free tools that will
handle them. "7-zip" seemed the least atrocious to me. I try to avoid the
fads for compression tools in favor of 1) STANDARDS, and 2) Open source.
The compression advantages are small and the nuisances are big.
Chuck
toggle quoted message
Show quoted text
On Sun, Feb 7, 2021 at 10:06 AM Jamie WW3S <ww3s@...> wrote: Are there instructions somewhere on how to load the .rar files? I found
them for the DFU files, but the firmware appears to be in the RAR
format.....
|
Pretty good for a man born in BC. And watches came on the seen in 16fh century
Clayton Heilman
"The world is run by those who show up." Richard George Weingardt
toggle quoted message
Show quoted text
On Feb 6, 2021, at 19:08, Scotty Hicks <Scotty@...> wrote: Ah, Confucius say man with two watches don¡¯t know what time it is. On Feb 6, 2021, at 4:32 PM, Ron C via groups.io <ronsampservice@...> wrote:
?Gyula HA3HZ,
I read somewhere that A man with a clock always knows what time it is.
A man with two or three clocks can never be sure.....................
So in review, I'd say that you're right on the money!
Ron
WRKM750
|
In the mid-January, my old 80m dipole broke due to icing and heavy snow. It had a direct connection with a coax for too many years .... and I decided to be with a Choke when the Weater improve.I started tests with several noname ferrite toroids and nanoVNA-H v.3.3. After some measurements (according to Fair Rite ) the toroides turned out to be MgZn, 40x25x11mm with Initial ?i 2000 or a bit more.
Stacked two with 14 turns 1.12 mm enameled wire in thermo shrink tubing (max diameter 2mm - the toroids are small). Normal winding .... tested and Reisert style... the same result.To avoad fixture capacitance I connected the Choke
direct to calibrated plane of nanoVNA CH0 - CH1.
Used nanoVNA alone, after with NanoVNA Saver, and OneofEleven application.
Full House with Data ...I've made a try to burn the choke with my PA and 250W
noninductive dummy load (with some pauses).KEY Down on CW and 175 volts p/p on Tektronix osci.
That is 612 watts on the peaks....The core and windings were cold as before the test ...I know the real test is up on the feedpoint of the antenna....
Seems the Choke can be used on 3.5Mhz- never have had 1.8 Mhz.Only 3.5-432Mhz.
The screenshots are attached.
Will be good some Expert to say something about this Choke....till I waiting for FT240-31 toroids.
Best Regards !
|
Re: loading .rar firmware
RAR is similar to a zip file- it's an archive with 1 or more files in it.?
You need to extract it's contents.? Use 7zip or another archiving app
On Sun., 7 Feb. 2021 at 9:14 a.m., Jamie WW3S<ww3s@...> wrote: Are there instructions somewhere on how to load the .rar files? I found
them for the DFU files, but the firmware appears to be in the RAR
format.....
|
Re: loading .rar firmware
|
Are there instructions somewhere on how to load the .rar files? I found them for the DFU files, but the firmware appears to be in the RAR format.....
|
Re: Which analyzer is more accurate?
On Feb 6, 2021, at 2:56 PM, Joe <k1ike_mail@...> wrote:
?On 2/5/2021 6:12 PM, Mel Farrer via groups.io wrote:
Based on 10 MHz, I built up a series SMT structure of a 0603 50 ohm and a 0603 -j50 ohm cap to ground. I don't understand what you mean by a " 0603 -j50 ohm
Believe he is referring to a 0603 size chip cap that has 50 ohms reactance at 10 MHz . -Ray WB6TPU
|
Chuck Cole
Clayton -ke7ngo
