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Thanks for the reply, but what's confusing me is that, looking at the results of the VNA, this appears to be a 9cm antenna.

Hi Marco, your measured file looks like measured directly at the antenna. But running antenna with you rig, you need a cable with connectors. So take a look at that cable and connectors and make a

Hi, just received my nanoVNA H4 and after a few satisfactory tests, decided to use it to fix my 3 element 50Mhz yagi which presents a little too high SWR on FT8 frequency (50.313Mhz). The SWR

OK, having the first turn near the reflector is one technique to get a 50 Ohm match. ?You may try moving it a bit closer to the reflector while watching 2.4 GHz response.? Next is that

Thanks for the reply, attached are some photos. Note this was sold in the UK as a 13cm antenna (I think by Sandpiper, but I may be wrong), many years ago. I've never actually built a helix design

Over the years I have tested over 100 Helix antennas on my antenna range,and only about 10% had forward gain and were circularly polarized. The Kraus formulas are overly optimistic and do not allow

Have been testing various antennas on my NanoVNA V2 Plus4 and in all but one, the results appear roughly as expected. The one that doesn't is a 2.4GHz helix, which shows a very poor match there and

"...you CANNOT brick the Nanovna..." Hold my beer!

Brent, Please browse the forum Wiki and Files sections. You will find PDFs and links to various User Guides that detail the flashing process and other neat stuff about the nanovna. plese remember -

Thanks, John. I thought it might be something like that. And I've learned a second thing from your reply, how to update the firmware. Is there a specific site or download I need to be connected

RESISTANCE IN YOUR COAXIAL CABLE STUB Your antenna has R = 0 Ω. The R+jX (Ω) chart allows for positive and negative R values. 1) What is the significance of R = 0 Ω in your “antenna”; Is

Full set of plots for my current setup I am pretty sure they show the gypsy antenna is not that good now to find a way to improve it.

Here you go

Brent, My NanoVNA has a couple of circuit pads at that location (VDD and BOOT0). When shorted together at power-up, they cause the NanoVNA to enter DFU mode for firmware update. I suspect your unit

I'm a new user to the group. I did a search on the topic but was unable to discover what the small momentary push button switch in the center of the right edge of the nano VNA does. None of the online

The following files have been updated in the Files area of the [email protected] group. * //NanoVNA PC Software/NanoVNA-App.rar ( /g/nanovna-users/files//NanoVNA PC

Thanks for the responses. The nanoVNA I have now I managed to break the s11 connector off the circuit board but I did repair it successfully. Then I 3D printed an enclosure to help protect the

There's 20dB of attenuation between the external port and the mixer. More likely a overpower situation would blow up the resistors in the attenuator before it cooked the mixer. The series resistance

Bruce: You might have caused the AD602 devices to open, as they have almost zero protection, aside from a capacitive input. The level of R.F probably killed them. The devices are readily available,

correction? email is DOT NET? ?as? ?n8cdw@... not . c o m *Sent:* Tuesday, November 03, 2020 at 10:51 AM *From:* "Ed March" <shop101@...> *To:* [email protected] *Subject:*