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I would offer these in my Tindie shop, but there seem to be so many slightly different version of the nanoVNA, I really couldn't grantee it would fit.

I agree totally, for what it is worth. Richard

I agree with your comments with regard to how well the NanoVNA works.? If you want a true laboratory instrument, be prepared to pay the price, and clear off a lot of bench space. Your evenings will

If the 900M firwmare complies with the gnu License AND building the firmware from github only generates one firmware type, presumably the 900M version, does that mean that the other versions, (300,

Hi Stuart, I did just that measurement in message #479. A tubular filter with better than 80 dB floor at 460 MHz. This was a 10 % Fo BW filter. Above 460 MHz, i.e. at 900 MHz, I see 40 dB on my

I've changed the project name to NanoVNA-H as recommended by edy555, I'm making a new PCB with a better shield, a brand new plastic case is almost finished, and I'll be offering a new version in the

I own and use several scalar network analyzers from HP, Wiltron and Anritsu.?One accurate way to test dynamic range, is to measure a known low pass filter, with a very fast and deep rolloff.? I have

Thanks, Roger. Understood. Should have more data tomorrow (I hope). - Jeff

Hi Jeff, The attenuator is supplied to be used as a verification device, with its measured s11 file from Dr Kirkby's VNA. In effect it is a black box, and doesn't have a label on it showing its

Thanks for the all the info guys. It'll be another month before I'm unpacked and can try it, but glad to know I've got what I need to give it a go. Thanks!

Roger, very interesting! Some questions and comments... First, what is the attenuator (how much attenuation, its input Z, and how is it terminated)? The 8753 and the Kirby reference are very

Could be you have one from Hugen, I have no idea. My guess is that the "GEN111.taobao.com" on the screen does not tell anything, since many of the clones are likely using Hugen's firmware. Do folks

All of the hugen version NanoVNA devices have the same redesigned IP5303 charging circuit. The original edy555 charge circuit only provided 3.7v output to charge the battery and power both the CPU and

Hi Warren LOL. I'm not worried in the slightest given that the spikes on this vna are 40dB down. I am interested though. The only possible impact I could see was if I was tuning up a filter

edy555's schematic calls for an optional MCP73831 Single Cell, Li-Ion/Li-Polymer Charge Management Controller. hugen's schematic calls out an IP5303 which performs that function and more. My board has

I bought my device from a U.S. ebay seller

Regarding that 600mhz spike: Would be interesting for somebody to look at the si5351 output clock with a scope on a unit with that 600mhz spike, see if anything weird happens when scanning through

An observation was made a while ago on this list that some of the discussion had descended into what the poster considered a bit abstruse for more general readers. I'd like to insert the observation

OK, I've done another test, similar to your original test Jeff, and the plot thickens somewhat. Procedure was: I did a calibration on the 8753, and on the Nano, using the same OSL standards from the

'scuse me? The chips on the battery are ONLY for overcurrent and under voltage. The charge controller is on the main board. It's the 8 pin dip above the 2uH choke. It's a combination LiIon charger