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
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#10195
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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
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#10194
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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.
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hwalker
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#10193
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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
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Aldo Cugnini
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#10192
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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
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#10191
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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
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#10190
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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
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Larry Rothman
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#10188
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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@...
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#10187
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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:
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Jos Stevens
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#10186
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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
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Jos Stevens
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#10185
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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
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#10184
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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
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#10183
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Re: Testing Cookbook Using a VNA
Thanks for the link; that is a useful resource. - Ed
By
n5kzw
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#10182
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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"
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hwalker
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#10181
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Re: nanovna-users]NanoVNA-H4 2Port calibration
Here are polar plots for CH1 connected to CH0 corrected vs uncorrected
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Oristo
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#10180
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Re: nanovna-users]NanoVNA-H4 2Port calibration
Here are screen captures from my "worse clone" for uncorrected vs corrected
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Oristo
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#10179
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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
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Jos Stevens
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#10178
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Re: Testing Cookbook Using a VNA
I just reconfirmed it working using a different (Safari) browser not logged into YouTube
By
Oristo
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#10177
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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
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Oristo
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#10176
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Re: Testing Cookbook Using a VNA
Interesting, the link goes to a channel that says there are no videos! Roy WA0YMH
By
Roy Appleton
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#10175
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