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Re: nanovna that continues to indicate 50 ohms when S11 is open
I have also seen this. Bad calibration kit. In my case the 50 ohm load did not connect well to the nut ring, which caused bad calibration. Order a new one in good quality. Best Soren
By sj@... · #9399 ·
Re: Amplitude calibration
You can measure a filter without a tracking generator and do want you desire... of course WHY. In any case, sure. Set your generator to the same level as your vna. Stop the vna sweep so you can do
By alan victor · #9398 ·
Re: Amplitude calibration
On Fri, Jan 10, 2020 at 08:54 AM, ejfelix4976 wrote: Just curious, is there a way to calibrate the output amplitude so that when measuring say a filter I can get it to read the same as a calibrated
By hwalker · #9397 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
On Fri, Jan 10, 2020 at 08:42 AM, Ken Liao, AA6KL wrote: " Kudos to Takahashi san for his innovative NanoVNA design and willing to share, to Hugen for his meticulous effort to drive down the cost and
By hwalker · #9396 ·
Amplitude calibration
Hi everyone, Just curious, is there a way to calibrate the output amplitude so that when measuring say a filter I can get it to read the same as a calibrated spectrum analyzer?? Thanks, Ed
By ejfelix4976 <edsgarage@...> · #9395 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
I am glad that Hugen finally decides to release the NanoVNA H4 product, based on F303 and 4" LCD. He kept improving the design that I didn't know when he would be satisfied. Besides these two main
By Ken Liao, AA6KL · #9394 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
On Fri, Jan 10, 2020 at 08:37 AM, Dick wrote: Is this model the one with the Big screen or the Little screen ? ======================================= Dick, Current model has 2.8" screen. This model
By hwalker · #9393 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Is this model the one with the Big screen or the Little screen ? Thanks, Dick, W1KSZ ________________________________ Sent: Friday, January 10, 2020 9:27 AM To: [email protected]
By Dick · #9392 ·
Re: Poor Manual
/g/nanovna-users/wiki
By Oristo · #9391 ·
Re: First PCB pictures of the V2
On Tue, Jan 7, 2020 at 02:26 AM, Gabriel Tenma White wrote: Because of popular demand we replaced the jog switch with buttons ===================================================== Gabriel, Have you
By hwalker · #9390 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
When I try that using Firefox, I get a blank white window after hitting "Send inquiry now" and, yes, I checked the agree with Alibaba box ============================================== Glen, On the
By hwalker · #9389 ·
Poor Manual
Where can I get better manual or instructions?
By Robert E. Gross · #9388 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Whats the total cost in gbp for sending 1 unit to the uk,ie vna inc shipping?
By Paul M3VUV · #9387 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
When I try that using Firefox, I get a blank white window after hitting "Send inquiry now" and, yes, I checked the agree with Alibaba box 73 Glen K4KV
By GmailK4KV <glenk4kv@...> · #9386 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
Although this is not the version I made, I am happy to remind you that you can view the correct data by simply switching the blue curve to CH0. The picture shows that the clone manufacturer uses very
By Hugen · #9384 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
Colin, These are with calibration active, can you go in the calibration menu and switch of the calibration so we can see the raw measurements? This will help understand where the problem is -- NanoVNA
By Erik Kaashoek · #9383 ·
Re: nanovna that continues to indicate 50 ohms when S11 is open
It seems that the more often I calibrate, the worse it gets. It also no longer indicates a short circuit :-( I have attached the picture ope, short and load
By Colin Dexter · #9382 ·
New video by W6LG #general_vna
https://www.youtube.com/watch?v=R5iYuGLvlas&feature=em-uploademail
By Dave Kjellquist, WB5NHL · #9381 ·
Re: coax loss
W6LG just posted a video measuring coax loss using nanovna and -saver: https://www.youtube.com/watch?v=R5iYuGLvlas His measurements were pretty close to the coax loss calc on my site :-) --kv5r
By KV5R <kv5r@...> · #9380 ·
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
NanoVNA-H rev3.4 has been similarly modified, please check https://github.com/hugen79/NanoVNA-H/issues/14 hugen
By Hugen · #9379 ·