Re: Transimission mesurements
Robin: Rather insensitive terminology here! "1) there is the odd Doll on this group as well as [far too many, /pro rata/] Guys¡± Chuck Young
By
Charles Young
·
#26085
·
|
Re: Frequency accuracy
Interesting video by W2AEW on this subject "How to tune a duplexer with a NanoVNA V2plus4 | is it possible?" https://www.youtube.com/watch?v=TbEK4v_3Xuo Roger
By
Roger Need
·
#26084
·
|
Re: SWR measurement
The attached image indicates you are measuring from 50 to 52 MHz, not 1.9 to 450 MHz. Dave - W?LEV -- *Dave - W?LEV* *Just Let Darwin Work*
By
W0LEV
·
#26083
·
|
Re: Frequency accuracy
Thanks, DiSlord for this! It's awfully close, and granted, for precision accuracy remember that we're comparing a $50-$75 device against oscilloscopes or spectrum analyzers which cost many times
By
Greg Giglio
·
#26082
·
|
Re: Frequency accuracy
My fw allow made internal 26MHz TCXO correction (see CONFIG->EXPERT SETTING->TCXO) Power on device, set 26MHz CW output Wait near 5-10min for device warm Measure output frequency Enter this value as
By
DiSlord
·
#26081
·
|
Re: Frequency accuracy
On 12/20/21 12:27 AM, Earle Wilkinson wrote: > Earle D Wilkinson > (6Y5EW) > > Home page: http://jamaicaham.org/ > Email address: earle.wilkinson@... > Echolink: 6Y5RA > > On Mon, Dec 20, 2021,
By
Jim Lux
·
#26080
·
|
Re: #general_vna Saving to SD card
#general_vna
As i see log, no any card installed: This string mean Nano Ask for card, and no any answer - Check the correctness of installation in the slot, the card should be contacts to the board and completely
By
DiSlord
·
#26079
·
|
Re: SWR measurement
You have a transformer with 36:1 impedance ratio, and an 1800 ohm load.? You should see 50 ohms on the other side. That is pretty close to what you see.? What were you expecting?
By
Jim Lux
·
#26078
·
|
Re: #general_vna Saving to SD card
#general_vna
Good afternoon. The same problem with saving to the card. Kingston 8Gb HC Card.
By
rc7c.alex@...
·
#26077
·
|
Re: Transimission mesurements
Jens, 1) there is the odd Doll on this group as well as [far too many, /pro rata/] Guys 2) for the technical question, imagine that there are *2* oscillators active, one at f?, one at f?+IF, where
By
G8DQX list
·
#26076
·
|
Transimission mesurements
Hello Guys, I've one question which puzzles me, and was unable to find information neihter in the forum nor in the Wiki. Since the NanoVNA outputs a rectagular signal which's harmonics are not
By
Jens M?ller <df9hj@...>
·
#26075
·
|
Re: SWR measurement
I see in NanoVNA-Saver screenshot frequency range 50-52MHz
By
DiSlord
·
#26074
·
|
Re: Frequency accuracy
Earle D Wilkinson (6Y5EW) Home page: http://jamaicaham.org/ Email address: earle.wilkinson@... Echolink: 6Y5RA wrote:
By
earle.wilkinson@...
·
#26073
·
|
SWR measurement
Hi All! I am now evaluating a 1:6 UNUN with NanoVNA that I bought quite recently. The UNUN is made of two stacked FT240-61 and 1.6mm copper wire with 100pF capacitor in the primary. To measure SWR, a
By
JF1XCV <hs@...>
·
#26072
·
|
Re: #general_vna Saving to SD card
#general_vna
After connectiin to PC, NanoVNA must see as additional COM port, you can check this in device manager. If no additional ports in, check uncnown devices, and update drivers. For USB connection baud
By
DiSlord
·
#26071
·
|
Re: Here's a Holiday Present for Users of all the nanoVNA Firmware Updates Developed by DiSlord !!
#specifications
#firmware
#features
#improvement
Larry, Sorry to see that your post got hijacked and went off topic! I want to than you for the work you did putting this DiSlord updates document together. Very interesting to see how the firmware has
By
Roger Need
·
#26070
·
|
Re: Here's a Holiday Present for Users of all the nanoVNA Firmware Updates Developed by DiSlord !!
#specifications
#firmware
#features
#improvement
My document is NOT on that website. The owner of that website attempted to hijack my thread and drive views and probably advertising revenue for himself. On Sun., 19 Dec. 2021 at 4:34 p.m., Rick
By
Larry Rothman
·
#26069
·
|
Re: NanoVNA as a Signal Generator
Disadvantage - with more points you get a slower sweep time. Advantages - - with more points the step size for a given frequency range is smaller so you get more plotting "definition". When measuring
By
Roger Need
·
#26068
·
|
Re: #general_vna Saving to SD card
#general_vna
DisLord excuse me for using your post. I need a clue why Nanovnasaver will not connect to usb port on my win 7 machine. I have win-7 SP1 plus C++ and Net+ installed and I also ran the Cypress USB
By
joe bell <joe.g4pmy@...>
·
#26067
·
|
Re: NanoVNA v1.1.00 fw pack for all H / H4 / LiteVNA / V2 / V2Plus / V2Plus4
#firmware
You not install 32768 quartz for rtc If you not plane install it, remove battery, wait 10sec and put it back. This reset lse mode to lsi
By
DiSlord
·
#26066
·
|