开云体育

Wow. Did you do that with any averaging enabled, or is that just that you
have a very good device?

--
Rune / 5Q5R

On Mon, 11 Nov 2019 at 16:26, Corneliu via Groups.Io <coralenka=
[email protected]> wrote:

Attached is the print screen of the 50 Ohm load sweep up to 1.4 GHz
73 de YO4AUL
On Monday, November 11, 2019, 05:39:19 PM GMT+2, Barry Jackson via
Groups.Io <g4mkt@...> wrote:


On 11/11/2019 15:13, Andy via Groups.Io wrote:

1Hz, wow, that's pretty cool.
I won't write off an upgrade in the future then.
73 de Andy

No don't, I found it really useful for checking an ADS-B RX antenna at
1090MHz. (jpole with 1/4-3/4 wave balun and shorted 1/4 wave stub filter
for rtl-sdr dongle))

See attached.

That output was with the antenna un-tweaked after building from nec2c
dimensions - very impressed with the results.

Cheers,
Barry
G4MKT

3 average measurements enabled. Thanks for your excellent software !73 de YO4AUL

Barry, looks like you are from UK.
I'm planning to buy one of NanoVNAs. Where did you buy your device, eBay ? Which firmware did you use for it?
I will be using my NanoVNA for the same purpose as you, to calibrate my antenna at 1090 MHz. So, ideally will be nice to have 1500MHz range. Thanks in advance for support.

I'm in the USA, and am looking for a NanoVva to go to 1090 Mhz, as I have several 17 element 900 Mhz Yaagi's that I want to modiflt to 1090 Mhz.
So I am looking forward to any posts similar to this one.

Tom W7TJM

Tom, the nanoVNA goes to 1500 MHz.? Just key in that frequency in the Stimulus menu.
BobK6DDX

On 04/12/2019 14:22, matyslubin@... wrote:

Barry, looks like you are from UK.
I'm planning to buy one of NanoVNAs. Where did you buy your device, eBay ? Which firmware did you use for it?
I will be using my NanoVNA for the same purpose as you, to calibrate my antenna at 1090 MHz. So, ideally will be nice to have 1500MHz range. Thanks in advance for support.

My unit came from an eBay supplier in Basildon Essex, however the listing is no longer there.

I would suggest the nanovna-h which comes with case and all accessories including a USB-C to USB-C lead for use with phones that have USB-C.
This version includes resistors to allow the use of this cable.

Search ebay for nanovna-h and look for the supplier in Basildon.

I think it will come with the 1500MHz firmware (a friend of mine bought one recently and it did). If not it is simple to upgrade it.

For best results be sure to calibrate it over a fairly small range, say 1050 to 1150MHz before using it at 1090, or the 101 calibration points will be too widely spaced.

Nanovna-saver:
Save the calibration to a memory and also to memory 0 before using nanovna-saver.
You can then re-calibrate in the software over maybe 1000 points within the span of use, to get even higher resolution.

Have fun, hope it works out.

Barry