Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
I'd say the original poster's question regarding whether the item he was considering purchasing is a NanoVNA-H v3.4 has been answered, and the eBay seller complaints have gotten off-topic.
IMHO, probably time to move on.
- Herb
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
I just bought a nanovna-h with 4" display from amazon with version 4.2 PCB. IT works very well so far and only took two days to get it.
Clarence, NT7V
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
Well, it's like this. Somewhere in the bowels of Guangdong province, someone rips a promising circuit. A manufacturer gets hold, orders up a slug of boards and parts, and makes up a whole lot of "finished" circuits. They are advertised somewhere, dunno where, and various sellers of stuff buy some and put them on ebay. This is Chinese entrepenureship. The sellers have NO IDEA what the device does, where to get the circuit diagrams, or how to apply the devices. Because of the descriptions, we buy the stuff, and then wonder why they're unusable. Because of our sunk cost, we try to find the original circuits and valiantly do the necessary work to use the stuff. Sometimes. Oh, BTW, if the devices have chips from known manufacturers, these chips are usually counterfit, like a bad Rolex.
Bah.
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Document available from Element14 -Tools & Test Equipment I: RF Spectrum Analyzer
Received an email -sponsored by Tektronics- Nice start for a NEWBIE.
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
Yes and to add insult to injury MANY greedy dishonest sellers after they reach a mob of negative feedback or get banned from e-bay simply create a new account and keep on going about their crooked ways. I have followed a numbers of scum-bags over the last several years and noted they have gone through 2-3 different user accounts !
E-Bay once did a good job of keeping track of these slimy characters but I think have given up....for example I know they would still (or at least used to) ban bad sellers if they noted the same name or phone numbers or PayPal acct used in the past on registration info if they were once banned.
But the scum-bags are very clever and create completely new identities and keep on doing what they are good at (separating you from your money). One sure way to find them is by searching for somewhat unique items that you know they have been selling and note their location, or at least a state or near a certain city. The light bulb then goes off when you see that the old seller (account) is no longer active YET the same item(s) can be found by a "different" user in the same town as the "original" guy.
Gedas, W8BYA EN70
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
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On 2/12/2020 11:23 AM, nanovnagroup@... wrote: On Wed, Feb 12, 2020 at 07:44 AM, Gedas wrote:
The really sad part about e-bay (because they are in the business of
making money) is that once upon a time feedback meant something. For
example your feedback stayed with you year after year !? So if a seller
screwed someone over 5 years ago you could read about it.
Very true, ebay now only lets you see the past 12 months of feedback activity, but the whole lifetime information was still being kept in their public database, but just not accessible though their website. Up until very recently there was a very effective Firefox Addon called EbayNegs that was able to dig up the whole negative feedback history on any seller (or member et all), which was always very handy when making a purchase decision. Unfortunately the author just recently stopped updating it as he grew tired of chasing after the changes that ebay was implementing to try and keep the addon from being able to reach this still very public information. He was not illegally accessing anything inside ebay by hacking into servers or anything like that, the database was in plain sight to anyone that knew how to find it.
More info on the now defunct Addon here:
R.I.P. :-(
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
Good morning.. 1st snow covering the ground today..
#1
I bought an assortment of SMA adapters from Ebay. About 50 adapters, $54 purchase. all same seller. SMA M/F to BNC/UHF/N DEC 7th,2019. Nothing till about Mid- January, a 4"x4" packet arrived with the CN tracking number. I held the envelope to the sun and could see nothing inside. Complained to Ebay. The seller answered it was an employee mistake, and that he had sent the correct shipment a few days after the 1st and I should wait.. Delivery by Jan 31.. Well about Feb 5, my complaint was settled by EBAY and money refunded.. Well, sitting in my ebay was a request for 26 SMA adapters as I ordered 2X of everything I wanted. So, I gave the guy 26 neutral feedbacks.. Because I was shipped an empty sealed envelope but Ebay did refund me, not the guy. 2-3 days later, I get a email from Ebay saying The guy bitched, I gave him Neutral feedbacks and Ebay deleted them. EBAY seller -RFTRAVELER
#2
These off shore sellers know they compete with others that offer faster on shore shipping, so if they have a relative in the US, they ship a big box of stock to the relative, who has no idea what they are shipping. The only thing in your favor is that IF is is advertised as 3.4 on EBAY and it is NOT.. They your entitled to a refund, But that brings up the question of paying for shipping..
Hope everyone enjoys their day...
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
On Wed, Feb 12, 2020 at 07:44 AM, Gedas wrote: The really sad part about e-bay (because they are in the business of
making money) is that once upon a time feedback meant something. For
example your feedback stayed with you year after year !? So if a seller
screwed someone over 5 years ago you could read about it.
Very true, ebay now only lets you see the past 12 months of feedback activity, but the whole lifetime information was still being kept in their public database, but just not accessible though their website. Up until very recently there was a very effective Firefox Addon called EbayNegs that was able to dig up the whole negative feedback history on any seller (or member et all), which was always very handy when making a purchase decision. Unfortunately the author just recently stopped updating it as he grew tired of chasing after the changes that ebay was implementing to try and keep the addon from being able to reach this still very public information. He was not illegally accessing anything inside ebay by hacking into servers or anything like that, the database was in plain sight to anyone that knew how to find it. More info on the now defunct Addon here: R.I.P. :-(
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
I agree, if the seller has a high number of transactions, a score of less than 99% usually tells the true story. In those cases I also try to read some of the negative ratings and specially the follow up responses of the seller that speak volumes about their mindset and attitude. If I see even one rude or aggressive reply to negative feedback received, I stay far away, even if they have otherwise mountains of positive feedback. I have also seen new sellers with less than 100 transactions dropping bellow 97% just because of a single negative, so that is worth keeping in mind specially if the one negative seems undeserved.
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
The really sad part about e-bay (because they are in the business of making money) is that once upon a time feedback meant something. For example your feedback stayed with you year after year !? So if a seller screwed someone over 5 years ago you could read about it.
But then they realized they were loosing sales and wanting to cater to the sellers (which is where all their money comes from) they now wipe the negative feedback off the record books after a year.
And a long time ago you could even battle it out in the feedback section with a seller (or a buyer) and go back and forth a few times but they got rid of that too as too many were leaving comments just for the sake of retaliation.
So bottom line is 100% feedback is better then a poke in the eye but it really does not mean the people you are dealing with are or were always good sellers.
Gedas, W8BYA EN70
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
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On 2/12/2020 10:21 AM, d balfour wrote: I always consider seller ratings and think of the percentage in reverse. A seller with 96 has 4% unhappy 98 has half of that 99 has 1/4th of 96%. 99.5% has 1/8 the dissatisfied customers of 96. If you treat people fairly it is not hard to get a 99.5.
Personally I don't want to deal with scumbags so I stay as close to 100% ratings as possible.
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
I received my white nanVNA 20days back. It has 650mah battery and is ver3.4
Pf course no shields , neither any case.
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On Wed, 12 Feb 2020, 8:52 pm d balfour, <davesters@...> wrote: I always consider seller ratings and think of the percentage in reverse. A
seller with 96 has 4% unhappy 98 has half of that 99 has 1/4th of 96%.
99.5% has 1/8 the dissatisfied customers of 96. If you treat people
fairly it is not hard to get a 99.5.
Personally I don't want to deal with scumbags so I stay as close to 100%
ratings as possible.
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
I always consider seller ratings and think of the percentage in reverse. A seller with 96 has 4% unhappy 98 has half of that 99 has 1/4th of 96%. 99.5% has 1/8 the dissatisfied customers of 96. If you treat people fairly it is not hard to get a 99.5.
Personally I don't want to deal with scumbags so I stay as close to 100% ratings as possible.
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
Another problem with the chinese sellers is that sometimes the language barrier is just too much for them and they just say "yes-yes" to everything without really understanding the question and just hoping to close the sale. I would assume that a lot of the negative feeback they get is because of broken buyer expectations due to this attitude. Not saying that is the case here, but I certainly have come across the situation quite often and usually stay away if the answer is just too ambiguous.
In any case no further replies received to my follow request to post pictures showing the PCB version number, so now we know why. Then again maybe the seller did not even understand what I was asking them for. Yes-yes...
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
This ebay item looks very much like the unit I purchased off of Amazon recently (< 4 weeks).
Attached are photos inside mine.
Assuming the photos come through.
I am new to NanoVNA and do not know enough to evaluate much further.
Unit arrived in the same kind of box with accessories.
The firmware build date is 25 November.
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-----Original Message----- From: nanovnagroup@... Sent: Tuesday, February 11, 2020 7:10 PM To: [email protected]Subject: [nanovna-users] US based Ebay seller claims he is selling v3.4 NanoVNA - true? I asked this "US Ship" ebay seller straight up and he replied that yes, his NanoVNA has in fact a v3.4 PCB. I also asked this morning on a follow up message if he could post some pictures of the PCB showing the v3.4 label on it, but so far have not heard back. Maybe he'll answer by tomorrow as he did yesterday. But in the mean time if any of you eagle eyed guys want to take a shot at this and see if this is really a v3.4 unit here it is: Please post any comments and opinions about it here.
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
There seems to be a lot of them on there claiming to have the latest unit.
What really gets me is not just the false advertisements but this line:
"Shipping Terms - For remote regions, we will charge your extra shipping costs. Usually it cost about 35USD-50USD. We will contact you after your payment. Thanks for your understanding."
Are they out of their minds, oh you paid me via Paypal now pay me again for shipping.
73 de ke4pwe
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Hi
One small note
This is not "PL-259 calibration" it is a PL-259 calibration-kit for calibrating SO-239.....
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
On Tue, Feb 11, 2020 at 04:10 PM, <nanovnagroup@...> wrote:
But in the mean time if any of you eagle eyed guys want to take a shot at this and see if this is really a v3.4 unit here it is:
=================================================================
The v3.4 NanoVNA-H has a 650 mAH battery and 0 dBm RF out. The ebay listing appears to be v3.3 from its specifications.
- Herb
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Re: US based Ebay seller claims he is selling v3.4 NanoVNA - true?
More negative reviews than I would like to see and many of them appear pretty serious.
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US based Ebay seller claims he is selling v3.4 NanoVNA - true?
I asked this "US Ship" ebay seller straight up and he replied that yes, his NanoVNA has in fact a v3.4 PCB. I also asked this morning on a follow up message if he could post some pictures of the PCB showing the v3.4 label on it, but so far have not heard back. Maybe he'll answer by tomorrow as he did yesterday.
But in the mean time if any of you eagle eyed guys want to take a shot at this and see if this is really a v3.4 unit here it is:
Please post any comments and opinions about it here.
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Re: Frequency and steps accuracy
Thank you everybody who answered my question. I got the answer I wanted.
73/Torbjorn
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11 feb. 2020 kl. 22:10 skrev pgc1682@...:
Hi,
Interpolation problem not only nanovna exist.
If you use nanovna saver 10 segment = 1010 points data. But another interpolation errors occured, because double calibration not ok.
Nanovna saver 1010 point calibration fully ok when use raw data and calibrate all point in nanovna saver, not use pre calibrated and interpolated instrumet data. I requested this method. I think scanraw command the key.
73,
Lajos
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Larry Macionski
Phil Royce