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When you first received the unit, the factory cal should be in memory storage ZERO. You should see a sweep say on the Smith chart from 50 kHz-900 MHz. Did you see this? If the unit is showing NO

I found the problem. The VNA does have a battery. The USB cable was bad. Bought a new cable locally and all seems well now. Thanks Glenn --

I received my NanoVNA last week, ordered from sqcase, a 'seller' here in the UK. I think they are a Chinese supplier with stock in the UK but it meant I got it quickly and it came with a battery. All

got my nanovna today and after calibrating and doing all the settings the calibration is showing but i cannot get it to show any traces or readings in swr mode with 100 ohm load or when connected to

Make sure it actually has a battery. When II bought mine from Bangoods it originally claimed to be shipped with a battery and fully calibrated, neither of which were true. When I went to write my

There should be a single flashing blue or red LED to indicate the battery is charging when the unit is OFF or ON. Once the battery is charged, the LED stays ON. Does the unit turn on and run off the

My nanovna finally arrived today. When I try and charge it, I get no indication that it is charging. Does one of the LEDs indicate that it is charging? I have tried two different USB supplies to

There are plenty of RF absorbing materials made for that very purpose. A look on Digikey finds ferrite

Yes, I made the black nanovna, but I found some bad black clones on ebay and aliexpress. The 3.2" ili9341 spi touch TFT LCD is also compatible, which is the maximum size that can be compatible. The

Graphite particles or metal particles in foam may slightly attenuate RF. But unless the particles are interconnected and the resulting network is connected to some sort of ground (thus forming a more

depends on the foam. Some have graphite in them, and some are for RF absorption. Moisture (in open cell foam) can also effect RF circuits

Foam is transparent to RF. DaveD Sent from a small flat thingy

The aluminum case for my SDR include a block of foam that I suppose absorbs RF energy. Instead of metal shields, I wonder whether a couple of layers of e.g. 3M AB5050 would

[email protected]> wrote: It is very risky ordering batteries from Amazon. Batteries are one of the most counterfeited products, and Amazon, along with eBay, are the places with most

That is just what I needed, I ordered one from Amazon and should be here today. I will be so nice to have something to use out of the shop. That big HP vna I have is a pain to move anywhere out of my

From Hugen who sells one of the "black" versions... Shielding and performance above 300 MHz is the issue. Plus Hugen just released a new firmware update that deals with frequency glitches at 300/600

Hugan, Are you the person building the black ones? Can a larger screen be used? If I was to attempt to repair this by replacing the screen, I would rather pay more and use a larger screen. Dr David

On Sat, Jul 13, 2019 at 03:32 AM, Oristo wrote: > > > Two bad clones have been found, they have failed to understand the role of > bridge and shielding, and made some bad modifications to

Hi Hi LOL... I bet it does... Take care, Alan ________________________________ Sent: Monday, July 15, 2019 1:35 AM To: [email protected] Subject: Re: [nanovna-users] NanoVNA case with sun

I'll have to wait until tomorrow,?? it works great outside now :-)