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  1. Nanovna-Users
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Deal on ebay

 

Mike, thank you very much for your insights. The correct use of a VNA is
all new to me and I welcome any and all advice and suggestions!

Roy
WA0YMH

On Tue, Oct 1, 2019, 7:03 PM mike watts via Groups.Io <wy6k=
[email protected]> wrote:

No No Roy! You need the female to female adapters if you use a coax
jumper to move the calibration plane away from the VNA and to protect the
connector on the VNA from physical stress. Attaching a DUT directly to the
VNA connector puts the VNA connector at some risk. My standard procedure
is to attach a coax jumper - rather than the DUT - to the VNA, otherwise
you wind up with some rather large rigid object sticking out in the air,
just asking for trouble. That is such standard procedure for me that using
it any other way didn't occur to me. That is what I recommend, but I
realize not everyone will always want to use it that way.

Whatever adapter you attach to the calibration standards must have a
female connection on that end since the calibration standard is male. The
other end should also be female if you use a coax jumper (almost all of
which have male connectors on both ends - including the ones included with
the NanoVNA). If you do not intend to use a coax jumper, then the other
side of the adapter should be male. I just didn't think to point out this
possibility in my notes.

I shall attempt to clarify that.

Thanks,
Mike WY6K
 

I've ordered a pair of SMA male to SMA female adapters to attach permanently directly to the nanoVNA to protect it's connectors. Hopefully they will arrive before the VNA does.

John KK6IL

On 10/1/2019 5:03 PM, mike watts via Groups.Io wrote:
No No Roy! You need the female to female adapters if you use a coax jumper to move the calibration plane away from the VNA and to protect the connector on the VNA from physical stress. Attaching a DUT directly to the VNA connector puts the VNA connector at some risk. My standard procedure is to attach a coax jumper - rather than the DUT - to the VNA, otherwise you wind up with some rather large rigid object sticking out in the air, just asking for trouble. That is such standard procedure for me that using it any other way didn't occur to me. That is what I recommend, but I realize not everyone will always want to use it that way.
Whatever adapter you attach to the calibration standards must have a female connection on that end since the calibration standard is male. The other end should also be female if you use a coax jumper (almost all of which have male connectors on both ends - including the ones included with the NanoVNA). If you do not intend to use a coax jumper, then the other side of the adapter should be male. I just didn't think to point out this possibility in my notes.
I shall attempt to clarify that.
Thanks,
Mike WY6K
 

Just rec'd my NanoVna about a month ago. Found this group with great info. This is my first comment. Hope it is taking the correct path into the Group's posts.
To protect the nanoVNA, I am mounting my nano onto a plate. Secured to this plate there will be two type N connectors connected to the nano's SMAs thru short SR coax SMA-SMA jumpers. The type N's were removed and saved from some HP instrument years ago. I am fortunate to have an HP 85032 Type N cal kit.
Pete, WB2UAQ, ex-HP, Agilent

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of John Kolb
Sent: Tuesday, October 1, 2019 8:49 PM
To: [email protected]
Subject: Re: [nanovna-users] Deal on ebay


I've ordered a pair of SMA male to SMA female adapters to attach permanently directly to the nanoVNA to protect it's connectors.
Hopefully they will arrive before the VNA does.

John KK6IL

On 10/1/2019 5:03 PM, mike watts via Groups.Io wrote:
No No Roy! You need the female to female adapters if you use a coax jumper to move the calibration plane away from the VNA and to protect the connector on the VNA from physical stress. Attaching a DUT directly to the VNA connector puts the VNA connector at some risk. My standard procedure is to attach a coax jumper - rather than the DUT - to the VNA, otherwise you wind up with some rather large rigid object sticking out in the air, just asking for trouble. That is such standard procedure for me that using it any other way didn't occur to me. That is what I recommend, but I realize not everyone will always want to use it that way.

Whatever adapter you attach to the calibration standards must have a female connection on that end since the calibration standard is male. The other end should also be female if you use a coax jumper (almost all of which have male connectors on both ends - including the ones included with the NanoVNA). If you do not intend to use a coax jumper, then the other side of the adapter should be male. I just didn't think to point out this possibility in my notes.

I shall attempt to clarify that.

Thanks,
Mike WY6K
 

I use SMA adapters on my VNWA and nanaVNA analyzers since the SMA connector is fragile. Whether male to female or female to female adapters I recommend Amphenol adapters which are a higher quality that the Chinese adapters. I buy mine form Mouser.

Mike N2MS

If the connector on the namaVNA fail I would eventually replace them with Amphenol connectors.

Mike N2MS

On October 1, 2019 at 8:49 PM John Kolb <jlkolb@...> wrote:



I've ordered a pair of SMA male to SMA female adapters to attach
permanently directly to the nanoVNA to protect it's connectors.
Hopefully they will arrive before the VNA does.

John KK6IL

On 10/1/2019 5:03 PM, mike watts via Groups.Io wrote:
No No Roy! You need the female to female adapters if you use a coax jumper to move the calibration plane away from the VNA and to protect the connector on the VNA from physical stress. Attaching a DUT directly to the VNA connector puts the VNA connector at some risk. My standard procedure is to attach a coax jumper - rather than the DUT - to the VNA, otherwise you wind up with some rather large rigid object sticking out in the air, just asking for trouble. That is such standard procedure for me that using it any other way didn't occur to me. That is what I recommend, but I realize not everyone will always want to use it that way.

Whatever adapter you attach to the calibration standards must have a female connection on that end since the calibration standard is male. The other end should also be female if you use a coax jumper (almost all of which have male connectors on both ends - including the ones included with the NanoVNA). If you do not intend to use a coax jumper, then the other side of the adapter should be male. I just didn't think to point out this possibility in my notes.

I shall attempt to clarify that.

Thanks,
Mike WY6K
 

On Mon, Sep 30, 2019 at 12:24 PM, mike watts wrote:
Or, they might be dumping inventory to get liquidity.
Manufacturers may be aware that V2 is coming,
at which point V1 will be a hard sell.
 

That's actually a good point.? However, the AD4350 only goes down to 137 MHz.? So unless they have done something creative to extend that range down lower, you will need BOTH V1 and V2 if you want to include HF.
Mike WY6K


"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."

On Wednesday, October 2, 2019, 9:20:36 AM CDT, Oristo <ormpoa@...> wrote:

On Mon, Sep 30, 2019 at 12:24 PM, mike watts wrote:
Or, they might be dumping inventory to get liquidity.
Manufacturers may be aware that V2 is coming,
at which point V1 will be a hard sell.
W5DXP
 

Are some V1 units still being shipped without batteries and shielding?
James R. Chastain
 

My order show shipped today. Now the waiting begins.
 

I just tried looking at the seller's eBay page and they no longer have ANYTHING listed for sale.
So - let's see how this all plays out at the end of the month so yes, the wait begins......

On Thursday, October 3, 2019, 10:40:59 a.m. GMT-4, James R. Chastain via Groups.Io <suenrod@...> wrote:

My order show shipped today. Now the waiting begins.
 

according to ebay my order is just shipped. It was marked shipped with a a tracking number, so I can track the status of the shipment.

Henning Weddig


Am 03.10.2019 um 18:56 schrieb Larry Rothman:

I just tried looking at the seller's eBay page and they no longer have ANYTHING listed for sale.
So - let's see how this all plays out at the end of the month so yes, the wait begins......


On Thursday, October 3, 2019, 10:40:59 a.m. GMT-4, James R. Chastain via Groups.Io <suenrod@...> wrote:
My order show shipped today. Now the waiting begins.
 

Actually, if you check, you will see that ONLY the shipping INFO was received by China Post - not the actual item.
This is what my eBay info says: ?? Shipping status Shipping info received

On Thursday, October 3, 2019, 1:03:30 p.m. GMT-4, Henning Weddig via Groups.Io <hweddig@...> wrote:

according to ebay my order is just shipped. It was marked shipped with a
a tracking number, so I can track the status of the shipment.

Henning Weddig


Am 03.10.2019 um 18:56 schrieb Larry Rothman:
? I just tried looking at the seller's eBay page and they no longer have ANYTHING listed for sale.
So - let's see how this all plays out at the end of the month so yes, the wait begins......


? ? ? On Thursday, October 3, 2019, 10:40:59 a.m. GMT-4, James R. Chastain via Groups.Io <suenrod@...> wrote:
?
? My order show shipped today. Now the waiting begins.



? ?


 

Always takes at least a day before it appears in the stracking
Dr. David Kirkby from Kirkby Microwave Ltd
 

On Thu, 3 Oct 2019 at 18:03, Henning Weddig via Groups.Io <hweddig=
[email protected]> wrote:

according to ebay my order is just shipped. It was marked shipped with a
a tracking number, so I can track the status of the shipment.

Henning Weddig

Same here, but clicking on the tracking number says that the label has been
created, but not actually shipped yet.

If this was $200 I would be a bit more concerned, but $20 is not much
money. If the VNA doesn¡¯t show up, and it takes me a couple of months to
get my money back, I am not bothered.

Dave.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United
Kingdom
 

Same here, but i stil i no negative Feedback for the seller. Strange.
Stan
 
Edited

Here's what can happen:

Someone has an eBay account and they decide they want to make some quick money from it. Or they hijack an account for the same reason.

So they'll sell something at a "price that's too good to be true." They sell a bunch of an item that they're never going to ship out. And they set it up so that there's a long time before you're supposed to get it. They are counting on at least some buyers forgetting about it until it's too late to ask for a refund. They get as much money as they can out of their PayPal account before they're caught and shut down.
And in many countries a few hundred dollars goes a long way! Often they don't need to get many buyers to make good money for themselves.
It sounds like that's what this is. So make sure that you don't forget to make a claim against it when the time comes that you can.

For something suspicious like this I usually put it in my calendar on my phone, set to a date a couple of months in the future with a notification that reminds me to check on it. I was duped once, but now I set a notification in the future so I don't forget.
 

Looks like this was a scam after all. The negative feedback is now pouring in with buyers complaining of fake tracking numbers and never receiving the product. "If it is too good to be true...." applies here.
Alexandre Souza
 

There is no such thing as a free lunch =)

---8<---Corte aqui---8<---


---8<---Corte aqui---8<---


Em s¨¢b, 2 de nov de 2019 ¨¤s 10:12, Don via Groups.Io <donald_s_58103=
[email protected]> escreveu:

Looks like this was a scam after all. The negative feedback is now pouring
in with buyers complaining of fake tracking numbers and never receiving the
product. "If it is too good to be true...." applies here.
 

Just ordered one for fun at $15.99... ref 254398992632
 

Just got my money back from the last bogus eBay listing at $19.95!

Roy
WA0YMH

On Sat, Nov 2, 2019, 9:20 AM hb9 iiu <hb9iiu@...> wrote:

Just ordered one for fun at $15.99... ref 254398992632
 

The Tracking Number the Seller gave me was for a package
delivered to Colorado (I am in Arizona !!).

Guess it's time to pulse e-Bay/PayPal.

Tnx, Dick, W1KSZ
________________________________
From: [email protected] <[email protected]> on behalf of Roy Appleton <twelveoclockhigh@...>
Sent: Saturday, November 2, 2019 8:13 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] Deal on ebay

Just got my money back from the last bogus eBay listing at $19.95!

Roy
WA0YMH

On Sat, Nov 2, 2019, 9:20 AM hb9 iiu <hb9iiu@...> wrote:

Just ordered one for fun at $15.99... ref 254398992632

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