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Screen replacement?
My VNA arrived with a busted screen, very bad packaging, unit works when connected to my computer. I received a full refund from Amazon despite what the vendor wanted which was a 40% refund.. I would
By va3nek@... · #8490 ·
Re: QEX Magazine #tutorials
But that does not include wide re-publication . DaveD Sent from a small flat thingy
By Dave Daniel · #8489 ·
Re: QEX Magazine #tutorials
It is allowed as "Fair Use". https://fairuse.stanford.edu/overview/fair-use/what-is-fair-use/ "In its most general sense, a fair use is any copying of copyrighted material done for a limited and
By Jim Shorney · #8488 ·
Re: QEX Magazine #tutorials
Quoting is always at the discretion of the copyright holder.? Any part of a copyrighted work is protected. Bob
By Bob Albert <bob91343@...> · #8487 ·
Re: QEX Magazine #tutorials
Define ¡°common knowledge¡±. DaveD Sent from a small flat thingy
By Dave Daniel · #8486 ·
Re: QEX Magazine #tutorials
Isn't it OK to quote copyrighted articles as long as one credits the source? How about just quoting the parts that are not already common knowledge?
By W5DXP <w5dxp@...> · #8485 ·
Re: QEX Magazine #tutorials
Ron, of course anyone is entitled to have a copyright for his writings.? That's part of what makes the free enterprise system as good as it is.? (And it isn't always so good.) Nobody should complain
By Bob Albert <bob91343@...> · #8484 ·
Re: Calibration Algorithm #calibration
Hopefully this will get fixed in Rune's next release. Are you around Rune??
By Roger Need · #8483 ·
Re: errors of "error" models
@Erik, PD0EK - REFERENCES: [2] 21 December 2019 - /g/nanovna-users/message/8473 [1] 10 December 2019 /g/nanovna-users/message/8105 Dear Erik, If we understand
By gin&pez@arg · #8482 ·
Re: Calibration Algorithm #calibration
Hi Jeff You are right. The S21 phase show double phase shift but Group delay is correct Delay(ps)=(phaseshift[degree]/freq[MHz]/360)*1e6 Kind regards Kurt -----Oprindelig meddelelse----- Fra:
By Kurt Poulsen · #8481 ·
Re: QEX Magazine #tutorials
Brings back (unpleasant) memories. A few years ago, I posted some information on eHam that Electric Radio Magazine had an excellent 3 part article (done by Ray, N0DMS, the Editor) concerning some
By Ron Bussiere <n4ue@...> · #8480 ·
Re: Calibration Algorithm #calibration
Hi Gary, Well, that proof in #8013 is certainly terse! I have a question: From the proof, I notice that sometimes G is set equal to +1 or to -1 (for open or short) and then this equality is used to
By Jeff Anderson · #8479 ·
Re: Calibration Algorithm #calibration
There might be a slight error in Rune's S21 compensation. Looking at his code, he defines the Thru's impairment as: gammaThrough = np.exp(np.complex(0, 1) * 2 * 2 * math.pi * self.throughLength * f *
By Jeff Anderson · #8478 ·
Re: QEX Magazine #tutorials
Erm no Paul (M3VUV). It's called copyright.
By Andy <punkbiscuit@...> · #8477 ·
Re: QEX Magazine #tutorials
ARRL is like that.? They are a business and have to justify asking people to join and pay fees. I have avoided joining ARRL for my 70 years as a ham because I always felt their pecuniary interests
By Bob Albert <bob91343@...> · #8476 ·
Re: QEX Magazine #tutorials
cant someone copy the article and save it to google drive and post a link??,seems pointless becoming a member as im uk and i only want to read that article,73 Paul.
By Paul M3VUV · #8475 ·
Re: NanoVNA connected to Amazon Fire tablet
You can install the Android Nanovna app on your Samsung along with TotalCommander and the use TotalCommander to copy the Nano apk from the installed apps folder to downloads. From there copy it over
By Larry Rothman · #8474 ·
Re: errors of "error" models
When I use the well known formula's used for calibration (%i16) and I do a linsolve twice to get G expressed in only g,s,l,o,S,L,O and then I write out all the multiplications I get (%o20) Factoring
By Erik Kaashoek · #8473 ·
Re: QEX Magazine #tutorials
Maybe someone can report the conclusion of the review. It only needs a few lines of text, ;-) 73 de Andy
By Andy <punkbiscuit@...> · #8472 ·
Re: nanoVNA Partner #nanovna_partner
Hi Maurizio, Yes, what is displayed is the value of X when Y is at maximum and it is the total delay and needs to be divided by 2. With regards to segmented sweep to increase the number of points, I
By neb · #8471 ·