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My nanoVNA came with three plugs 1 Gold without pin - OPEN 1 Gold with pin - appears to have a solid gold insert 1 Silver with pin - insert has white center around pin, silver ring and black ring

Hi all, Seems I've ordered the same item (due next week), but there was no mention of shielding in the description when I ordered it! For testing homebrew antennas I'm not concerned; Considering some

Hi all, Seems I've ordered the same item (due next week), but there was no mention of shielding in the description when I ordered it! For testing homebrew antennas I'm not concerned; Considering some

Sorry for getting back to you late. My wife and I were were up in NC, her father wasn't doing well and passed away on the 15th. I'm back in NC now. It is not on Thingiverse. I'll send you the file for

I bought this one from eBay: Item ID: 233265098213 Seller ID: sqcase because it was a UK source (Birmingham) but as it had no shield (and was described as having such) I sent it right back. Waiting

Obviously the seller stole my product picture, but in the sale of inferior clones, I am very disappointed.

...but one advantage to using the equations based on the ideal A terms is that you should be able to fold the references’ parasitic elements into them (e.g. the open’s 50 femtofarads capacitance).

Thanks very much, Roger, Dick Benson, my go-to VNA guru, just sent me the following Matlab script for a single-port correction: function Gcor = Cal_Function(Goc,Gsc,Gzo,Gm) Gcor = ((Goc - Gsc).*(Gm -

Transporting lithium ion batteries legally is not easy. Of course, a lot of the sellers don’t worry about that sort of thing. Dave -- Dr. David Kirkby, Kirkby Microwave Ltd,

!!@%$*^(#!! Sorry, didn't see that. Well, you can always order form the guy several of us on the forum bought from: Guangyi0016 on Aliexpress Good service and Hugen's version, WITH battery and

The referenced tomtop sell price seemed like a good deal until I noticed in the specification list that a battery is not included.

Today's TomTop.com specials includes what appears to be Hugen's version of the nanoVNA. It's on sale for a tad over $42 US. with FREE shipping https://www.tomtop.com/p-e7175.html I've ordered from

wrote: I agree with the original poster. The return loss of a passive device should be a positive number. There was an article about this by the editor of one of the IEEE journals. Dave. -- Dr. David

Gary N3GO I deeply thank you for your message. Not only I have learned more from it more than the dozen messages before, I also retained one of the last paragraphs you wrote: "We really shouldn’t

FWIW I am of the opinion that it would be more beneficial to users of this group who come here for understanding if they could build knowledge on what they read rather than wading through long debates

Hi Jerry, Thanks for the comments. On the Si5351, it is not uncommon for the AC source impedance of an RF amplifier or buffer to appear to be 50 ohms. However, the available source current

Dr. Dave I was not addressing theoretical simplicity. I was addressing the practical simplicity of “dynamic range” as it applies to this device. I HAVE done serious measurements of the NanoVNA.

A minor correction, I said: With an open across Z in my simple bridge example, the voltage on the left side of Vd is equal to Vs. The voltage on the right side of Vd is still Vs/2, so the voltage

drkirkby@...> wrote: My grammar is poor, but more importantly I am not explaining the technical matters correctly. For a professional VNA, the maximum power the receiver can take

Warren, I am afraid to say it *is* more complicated than what you state. There are actually at least *two* dynamic ranges on a VNA. The lower limit of useable measurements is usually set by the noise