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Is my off brand a Brick?
Was my First purchase from China a mistake? This is a no battery clone I assume. First session I used Saver 0.2.2-1 to do a calibrate. My device is now non responsive. I do see the 'Disconnect' on
By John · #10195 ·
Re: Cheap calibration loads #parts
Herb, Making reasonable quality loads is not difficult.? See https://youtu.be/-PK9Bn7Ixnw if interested. Larry, W0QE
By Larry Benko · #10194 ·
Re: Cheap calibration loads #parts
On Sat, Jan 25, 2020 at 02:31 PM, Aldo Cugnini wrote: 68 ohms (resistance) will give you a VSWR of 1.36, so it's very nearly inspec, according to the soec sheet you linked.
By hwalker · #10193 ·
Re: Cheap calibration loads #parts
68 ohms (resistance) will give you a VSWR of 1.36, so it's very nearly in spec, according to the soec sheet you linked. -. Aldo
By Aldo Cugnini · #10192 ·
Re: Cheap calibration loads #parts
On Sat, Jan 25, 2020 at 01:08 PM, <cosbug@...> wrote: Could someone advise if these SMA terminators are good ? I've done a resistance check at DC using multimeter and it's shown 68 Ohms (too
By hwalker · #10191 ·
Re: nanovna-users]NanoVNA-H4 2Port calibrationof
On Sat, Jan 25, 2020 at 12:37 PM, Jos Stevens wrote: yes I did use the calibration wizard and I have done it so often that I can do it blindfolded.. The only thing different is that For the H4 I used
By hwalker · #10190 ·
Re: Cheap calibration loads #parts
Hmmm...looks like a Nano-Cantenna ;-) On Sat, 25 Jan 2020 at 3:34 PM, hwalker<herbwalker2476@...> wrote: Ever wonder why some 50 ohm loads are reasonably priced, look great at dc, but quickly
By Larry Rothman · #10188 ·
Re: Cheap calibration loads #parts
Hello All, Could someone advise if these SMA terminators are good ? I've done a resistance check at DC using multimeter and it's shown 68 Ohms (too high by me, should be lower). Secondly, I've
By cosbug@... · #10187 ·
Re: nanovna-users]NanoVNA-H4 2Port calibrationof
I forgot to mention That I used 10 Segments in NanoVNA-Saver Jos Op 25-1-2020 om 21:37 schreef Jos Stevens:
By Jos Stevens · #10186 ·
Re: nanovna-users]NanoVNA-H4 2Port calibrationof
Hi Oristo and Herb, Thinks for the pictures Oristo, i think they are from the 2.8" NanoVNA-H, my 2.8 -H version works well, this problem is? with my VNA new version H4. Herb,? yes I did use the
By Jos Stevens · #10185 ·
Cheap calibration loads #parts
Ever wonder why some 50 ohm loads are reasonably priced, look great at dc, but quickly veer off 50 ohms at higher frequencies? Take a look at the attached photo, courtesy of one of the Russian NanoVNA
By hwalker · #10184 ·
Re: Corrupted firmware.
Another suggestion to reduce novice frustration is to advise them to download the ST files using a PC that has their email client installed, in order to pass ST¡¯s identity verification scheme.
By Bruce W4CG · #10183 ·
Re: Testing Cookbook Using a VNA
Thanks for the link; that is a useful resource. - Ed
By n5kzw · #10182 ·
Re: nanovna-users]NanoVNA-H4 2Port calibration
On Sat, Jan 25, 2020 at 09:19 AM, Jos Stevens wrote: " I'm testing my new NanoVna-H4 iusing NanoVNA-Saver and have a problem doing the 2 port calibration"
By hwalker · #10181 ·
Re: nanovna-users]NanoVNA-H4 2Port calibration
Here are polar plots for CH1 connected to CH0 corrected vs uncorrected
By Oristo · #10180 ·
Re: nanovna-users]NanoVNA-H4 2Port calibration
Here are screen captures from my "worse clone" for uncorrected vs corrected
By Oristo · #10179 ·
nanovna-users]NanoVNA-H4 2Port calibration
I'm testing my new NanoVna-H4 iusing NanoVNA-Saver and have? a problem doing the 2 port calibration . When I have done the last item of the calibration procedure (through) I see a nice sinewave-like
By Jos Stevens · #10178 ·
Re: Testing Cookbook Using a VNA
I just reconfirmed it working using a different (Safari) browser not logged into YouTube
By Oristo · #10177 ·
Re: Full reflection runs over the perimeter of the smith chart
No, but I do not have semi rigid coax.. First measurement using 35cm RG316 shows loss from 250-400MHz. Second measurement using longer LMR-400 shows loss from 41.67-66.67MHz, approximately matching
By Oristo · #10176 ·
Re: Testing Cookbook Using a VNA
Interesting, the link goes to a channel that says there are no videos! Roy WA0YMH
By Roy Appleton · #10175 ·