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On a NanoVNA the CHO port connects to a bridge with ~50 ohm DC resistance. See the schematic of at least one version. CH1 connects to a attenuator, also with approximately 50 ohm DC resistance. That's

All RF devices have input and output resistance of 50 Ω - unless you're in the TV business (they have 75 Ω) - otherwise youi'll get reflections (bad SWR). Martin

Paul, Trace 1? Yellow is the color of the 1st trace (Trace 0) - but nevertheless: Menu - Display - Trace - set Trace 0 active - Back - Format S11 (Refl) - set SWR active Enable/disable the other

Hi all,long story my homebrew pi network atu wasnt tuning so stuck my v2 vna on it to have a look,at one point in the c2(variable cap nearest the output jack for the rig)looked as iff the vanes were

Hi ,i have loaded this but cant seem to get swr to show on trace 1,it says logmag,it used to have swr in yellow numerals in the top middle of the screen with my old fw,any ideas?.

In terms of the raw message from the NanoVNA (in response to the "data" command)? It's real and imaginary of the reflection coefficient(for CH0) or transmission coefficient (for CH1) You'll also need

Is there a document that better explains what the returned data from a sweep really means? 73 de Glenn N3MEL (FRNPA) 1st Responders Network of Pa PKT:145.090 &?VARA HF:3.596?WL2K:145.670 Emergency

I would also encourage you to try PayPal, and to include any independent statements you can get about the non-delivery of your item. I raised a case with eBay about non-delivery of an item from a UK

I'm careful, but my experience with PayPal fixing bad deals, frauds, non-deliveries, etc, is very good and has been for years. I never leave money with them. Chuck

I've been lucky that I have not actually lost any money. I've always managed to get a refund. My close calls have all been on deals that seemed too good to be true. One was half the price of any other

Of course anyone’s experience may vary, but over a period of years I have made purchased dozens of purchases from both AliExpress and Banggood. I have never had any issues with either group. However

You are covered when you pay via PayPal. Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1) lester@... 452 Stable Ln Keyser WV 26726 USA GPS: 39.336826 N

Similar story on AliExpress out of China on a few orders. In this scam the vender would issue a FedEx tracking number that would show delivered, after some time. However, in conversation on line with

I agree, Paypal is UNSCRUPULOUS, disagree?? Read the story about the guy that made a huge buy of 18650 li-ion cells and then got SCREWED by Pay@$#^ because they (Pay@#$^) wanted to hold the payments 6

Yes, I think we need to use payment methods that offer protection for unscrupulous sellers. And PayPal is a good example. ?n joi, 24 nov. 2022 la 00:33, John <ve3kkqve3kkq@...> a scris:

I realize that this bit of advice is too late, but always buy from the OFFICIAL vendor. I had a similar experience with a "really good deal" on a Chinese VHF mobile radio. I was very excited to

Unfortunately, such situations have also appeared on Aliexpress. Fictitious tracking numbers, seen only by them. Shopping in China has become an adventure. The biggest loss I took was 120 USD, but I

I purchased a model SV4401A 8-inch VNA from eBay seller Hui3165 on Oct 24 because their price was much lower than any other supplier. I followed the tracking on SpeedPAK Standard from China to my

I ran some quick NEC models, results attached. The R doesn't change a lot until you get outside, say, 0.3 to 0.7 split point (0.5 in middle). This was a dipole "cut" for 10 MHz resonance. And the

One might want a transformer (which could serve as a balun or RF choke) on an OCF dipole, because the resistive impedance at resonance is typically quite high, compared to 50 ohms. OTOH, if the