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Hi Bob, I tried your trick also, and also with no luck :( That "USB unrecognized" message still appears. And BTW, no COM port appears in Device Manager when I am trying to connect my friend's NanoVNA

Hi Fred , I tried your hint, but unfortunatelly with no luck :( Still the same problem...

SUGGESTION: First learn the ropes at HF frequencies, <20 MHz. Once you have conquered those, then branch out to higher frequencies. Dave - W?LEV [email protected]> wrote: -- Dave - W?LEV

Addressing your first plot from 3 to 30 MHz: Your worst case return loss (RT) shows roughly 4 dB at the low end and pretty much 5 dB for the rest of the plot. At low points of the RT I'd expect

I've seen other kits which supply 130 ft with a 56:1. (and since you went with a heavy wire you are a little long on your trim yet - its seen in your traces) If its high enough a counterpoise isn't

The 49:1 UNUN is whatever MyANTENNA sells. I did not open it or examine it. I took off the counterpoise and put it back on (30 ft wire) and it made very little difference since the coax itself served

Stan You raise good points. I am using the space I have available. The 140 ft #12 wire attached to the MyANTENNA 49:1 UNUN is about 20 ft above Chester County ground and is horizontal the whole way

Can you please be more specific on the install configuration. I've also had a lot of mixed results and had to look the the UNUN cores on off the shelf unun's more. That being said, more information on

You don't even need to use printed circuit boards, just a scrap piece of circuit board material and start piling components on top of it. This way, ground is everywhere. Here are a 900 MHz oscillator

Hi Ernest, I am pretty sure they FW uses the odd harmonics, but you will still see the instability at both the odd and even harmonics if you do a scan from 100KHz to 1.5GHz. If you lower the Threshold

Barry, Looks like you've got some decent readings that your antenna tuner can grapple with reasonably. I was curious as to how you have the antenna placed. How high above your ground is it? Do you

In general it is challenging for me to build a good test-fixtures for this purpose. Ideally I should have a dedicated PCB, something like the nanoVNA test-board. I also started some experiments with

After you've seen your nanovna with saver try closing saver and reopening with no device attached, then connect your friends vna. If it doesn't see it, check and if you're using a usb-c to usb-c that

Try powering on the nano before you plug the usb cable into the computer. Fred N4CLA [email protected]> wrote:

Hi group, An old friend asked me to help him by writing the firmware in his recently achieved NanoVNA-H and to see if NanoVNA Saver can read it. Well, I managed to upload the firmware by using

I used an SMA 6 port switch and SMA-UFL jumpers to make that test board(an earlier version) more suited to class demos. The jumpers were surplus from sons work- got a box of 50 or so that were being

I agree & practice the “dead bug” style of construction as Kirk mentioned, for prototypes, sometimes finished products, all on a pcb gnd plane. But saving on connectors, esp. in a prototype, I

Hi Rob, I have this nanoVna test borad as well. Works okay. For the purpose I wanted to use the ufl it would be useful if I had a experimental pcb that have the specific pads to mount these. I don't

Have you tried this? https://a.co/d/akK8Wck I’ve used it for teaching. I agree UFL connectors suck, but this is a throwaway item really, and allows real concepts to be experienced! -- Rob rowlands

*I am experimenting with a ? MYANTENNA ? 80m end-fed with a 49:1? UNUN? on loan* *I substituted a heavy gauge #12 wire for the wire that came with the antenna.* * * *I started to alter the length