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If you have to replace it, consider getting a SAA2. I have several of them , including the one with metal case and N connectors. It feels robust and pleases (my) eye. They are available on Ebay for

You didn't brick it - you burnt it !! You'll have to open it up and if the traces are still intact, replace the burnt resistor bridge. That bridge can take about 10mW max before nasty stuff starts to

Did a stupid. I was measuring an antenna and left the VNA connected to the feed line while I went off and did something else for a bit. My automatic message system kicked off and transmitted from a

Roger, I'm looking at purchasing a new nanoVNA. I'm trying to decide between the H and the H4. The small screen doesn't bother me since I use nanosaver anyway. Question: what do you mean that

I saw in this video the other day at 1:40: https://www.youtube.com/watch?v=sIRAAZjE2Ms The presenter talks about using a length of 75 ohm cable inline to match a (theoretically) 300 ohm folded

At low frequencies on receive, the mismatch may not hurt you all that much - the input Z of the receiver probably isn't all that closely controlled. The noise figure of most HF receivers isn't all

and again on one of the short patch leads on the VNA (S11 coax loss measurement) ..

You do get 'ringing' (reflections) right across the frequency range when you measure coax loss using just the S11 reading. So you will get a large variation depending on whether the far end of the

Hi VE3SJK, Can you please sweep the antenna 1 from 500 kHz to 4 MHz? Make sure you calbrated the vna first. How long are the wires (exactly)? How long is the coaxfeed between vna and antenna? If

Disconnect your antenna and leave the koax open. Then measure the reflexion factor in dB at the other side of the koax. The loss in koax is now half the reading of the reflexion factor at each

Get yourself an antenna tuning unit (ATU). If doing receive only you will need a manual type as the automatic ones need a few watts of tx power to detect a bad match. You can use the VNA to help tune

Is it possible all the loss is in the coax itself i did the connectors myself and its been many years since i did one, the cable i used was stuff off of amazon. I am going to try and install the

They are just included as extra parts for you to use for your projects or to build a calibration load using the spare pin sockets. Roger

The Gypsy antenna looks quite loosy with only two real resonances. Those being roughly 9 and 16.5 MHz. It hugs the outside of the Smith Chart which indicates loss. Not a very good antenna in

Hi All, I am a new owner of the nano vna and i am not really sure how to read the results of the plots. Originally i had just strung up a random wire between my garage and back fence and i have

Hi, I bought mine through Amazon. It cost me a little more but there is assurance that you won't get ripped off. I bought my first tinySA through them too. My second SA I bought used from another ham

Amazon has them, and if you want you can easily return them AC6K [email protected]> wrote:

Do you mean the nanoVNA-H4? I would not even consider a 2.8" screen NanoVNA-H now that 4" models only cost slightly more. In addition to the larger display the -H4 has better RF performance and there

R and L in the us has it. http://www.randl.com/shop/catalog/product_info.php?manufacturers_id=142&products_id=75145&osCsid=g71npiu6ab6bvut9s97s8hncj4 That is the 4inch H version. [email protected]>

I have a NanoVNA which I love but now it's time to upgrade to a Nano VNA-H. Can someone please recommend a trustworthy site Thanks... Vin