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.. also lacking CH0 label and third calibration "standard" above 300MHz. Thanks, Hugo, for the clarification. Do you know about this other version, seemingly not using screws? If

Sorry, the LCD screen is damaged due to express delivery.

On Sat, Jul 13, 2019 at 05:15 AM, Martin Rickes wrote: > > Hi! > > Same here, got it also today from the same seller. > > I added some shielding. Did not see a drastic improvement. > Performance is

Shown here is measurement of 27 MHz crystal without any padding. It was done primarily to see if there would be any effect of calibrating Nano over small frequency range. Here I chose a center freq

wrote: Black. I attach a picture of it. -- Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United

Hi! Same here, got it also today from the same seller. I added some shielding. Did not see a drastic improvement. Performance is between "okay" and "meh", good enough for fieldday-use or to check

Is the non working VNA a black one, or a white one ?

I got prettty peed off with an eBay seller. I bought a NanoVNA, which he shipped 3 weeks after getting my money. It arrived yesterday, but when powered up, all I get is a white screen, and a couple of

My unshielded black clone just arrived, 16 days after ordering. White text is less bold than on shielded black units, and front bezel is held by 4 black screws, while others appear bright

Also perhaps 'Donate@ it to the world and take the duff one apart see what is really in one of them ... obviously nit just a dummy load as i suspected or you would have that nice big dip for

Makes you wonder how many people buy something like this and just plug it in expecting it to have been tested etc beforehand ... then damage thier TX.

Here are the images: Sorry for the bandwidth. ________________________________ Sent: Friday, July 12, 2019 3:50 PM To: [email protected] Subject: Re: [nanovna-users] Narrow band filters and LO

Here are some home made roofing filters. The bandwidth, center frequency and transition to the noise floor are a reasonable challenge for the casual measurement. In these measurements I see no issue

Very nice. Thanks for sharing. Nice example of taking a 2 pole monolithic crystal filter and sweeping it first in a 50 ohm system and noting that it is not properly terminated. Then adding series

Great. Happy to hear success. There are further improvements that can be accomplished in the cal process. However, will see if they make sense and provide enough improvement to warrant posting. Alan

Here is an article about crystal filter analysis by nanoVNA: https://ttrf.tk/posts/2017-01-15-measure-crystal-filter-with-nanovna/

Thank you Alan W4AMV, Finnally I have my nanoVNA correctly calibrated. I am happy now with the measurements! Cheers and 73 Luís, CT2FZI

There is a filter spurious on the high side of the skirt. This shows up as a spike on the VNA display. There is none on the low side skirt, despite what appears to be a spurious on the VNA display. I

Never one to back away from a puzzle, the resistive pi network for crystal testing reverse-engineers to a 50 to 12.5 ohm matching pad with just under 15 dB loss (14.774).? Probably trying to "match"

It was tested with a small ground plane. Tried other configurations too, but with only very small changes. This antenna was bought on eBay for US$0.99 with free shipping. So it was probably a poor