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Re: NanoVNA-H4 firmware update using Windows virtual machine with macOS #firmware #macos #nanovna-h4
Excellent! Loaded it up and I really like the GUI improvements.
By Bill Cody · #16938 ·
Re: NanoVNA-H4 firmware update using Windows virtual machine with macOS #firmware #macos #nanovna-h4
Latest is v0.9.1.0 and it is without sdcard mods. The v0.9.1.1 is the same as 0.9.1.0 but with sdcard mods. https://github.com/FreeRepositories/NanoVNA-H4/releases
By afreeangel@... · #16937 ·
Re: Does anyone know how sensitive the nanovna is to electrostatic discharge?
Nothings about maximum signal input mentioned on NXP site for either SA602AD, or SA612AD. [image: IMG_20200824_135629964.jpg] [image: IMG_20200824_134645191.jpg] [image: IMG_20200824_134411855.jpg]
By aecradio1@... · #16936 ·
Re: NanoVNA-H4 firmware update using Windows virtual machine with macOS #firmware #macos #nanovna-h4
Thanks afreeangel@. I'm not certain why you posted your reply, but I can only guess that you're hinting that a later version firmware is available. In any case, looking at your link, it seems to apply
By Bill Cody · #16935 ·
Re: NanoVNA-H4 firmware update using Windows virtual machine with macOS #firmware #macos #nanovna-h4
https://github.com/FreeRepositories/NanoVNA-H4/releases/tag/0.9.1.1
By afreeangel@... · #16934 ·
Re: NanoVNA-H4 firmware update using Windows virtual machine with macOS #firmware #macos #nanovna-h4
So - I found my own solution for flashing the firmware using the dfu-util command line interface. FIRST: I replaced the standard driver using the method here:
By Bill Cody · #16933 ·
Re: Does anyone know how sensitive the nanovna is to electrostatic discharge?
From the info from NXP, neither the SA602AD or the SA612AD indicate a max. input signal into either port. Max Vcc is 9 Volts though They list TOIP, but not a maximum input signal level, or frequency.
By aecradio1@... · #16932 ·
Re: Where did OneOfEleven go
Don¡¯t just highlight this one message. It also had a precedent. see from here: /g/nanovna-users/topic/76003965#16196 -- *** If you are not part of the solution, then you are the
By Gyula Molnar · #16931 ·
Re: Does anyone know how sensitive the nanovna is to electrostatic discharge?
ESD (Electrostatic Discharge) is not the issue. 90-watts into a sub-milliwatt port is the real problem! Likely some silicon was disordered from its engineered ordered state. Dave - W?LEV -- *Dave -
By W0LEV · #16930 ·
Re: Presentation on the NanoVNA for the Raleigh Amateur Radio Society
I enjoyed your RARS presentation last month Dan. Thanks for taking the time to put it together and present it. 73, -Rob N4MN
By Rob Cox (N4MN) · #16929 ·
Re: Does anyone know how sensitive the nanovna is to electrostatic discharge?
I have apparently tested and exceeded the limit by briefly sending about 90w rf at 50 MHz into the CH0 port of my nanovna-H. --by accident-- I wanted to upgrade to the larger display H4 model anyways.
By Terry Wassell #1398 · #16928 ·
Re: Dipole length
Arguments and snake oil regarding antennas and transmission lines should not prevail when the hard, cold, correct, engineering practices and hard physics of the situations are considered. These
By W0LEV · #16927 ·
Re: New NanoVNA-F Firmware Released
So many firmwares, so many hardware variations. Can't use this one for my nanoVNA but thanks for the heads-up. -- Brian
By Brian Morrison · #16926 ·
Re: We started selling SAA2 with N-type RF connector and 4-inch display
I could not get Alibaba order form to understand how a Swedish mobile phone number looks like... so I ordered via AliExpress and payed with PayPal without any problems. Now just wait and see.... /Lars
By SM0TGU · #16925 ·
Build a 4" NanoVNA V2.74 in aluminium case #buying #design #enclosure #hardware #lcd
Hi, I have build my version of the NanoVNA V2, in short it is in a hammond aluminium case with 4" Display and 4000 mAh battery. Currently selling some on tindie:
By @blackmagic · #16924 ·
Re: Dipole length
Point 1) is wrong (if resistance is greater than 50 ohms), Point 2) is correct. Use your nanovna to measure the phase of S11 for a resistor that has a value between perhaps 60 and 100 ohms. Keep the
By Jerry Gaffke · #16923 ·
Re: V2 and V3 roadmap
©\©\©\©\©\©\©\ Original Message ©\©\©\©\©\©\©\ The device sounds fantastic. For me, no screen would be ok as long as there was really good, cross platform, open source software to run on
By Peter Loron · #16922 ·
Re: Dipole length
As Miro has pointed out, tuning an antenna for resonance by looking for a pure resistance in the nanovna display must be done when measuring at the antenna feedpoint. This can be done by attaching
By Jerry Gaffke · #16921 ·
Re: Dipole length
1) Yes, measure the frequency where the phase shifts from +180 to -180 degrees. 2) Using the definition of resonance: Measure the frequency where the complex portion of the impedance goes to zero. In
By W0LEV · #16920 ·
Re: Dipole length
It's a bit more complicated than that. When the resistance at resonance is less than the 50 ohm impedance of the VNA, the reflection is 180 degrees out of phase with the incident signal. This would be
By Jerry Gaffke · #16919 ·