开云体育

For my nanoVNA version H3.2? I measured Returnloss on CH1: -55dB on 1 MHz, and -33dB on 30 MHz. More than good enough for measurements on those transformers. Have you ever tried your VNA measurements

What about the new SAA2? Any practical eperience yet? On paper it's much better than either F or H4.

Your ship confirmation from Tindie should have included a tracking number (in my case, of the form LW...9 digits...CN). This form of tracking number is accepted by usps.com (which in my case shows

Neal: ? I just got a shipment of boards from JLCPCB that were shipped last Saturday. Dave - WB6DHW

Nanovna-saver seems to show a flat line. 1. I'm not sure now. I never noticed this before, because I always used this at over 100MHz. The problem appears when the sweep starts at low frequencies. 2. I

So glad I posted on here before I even got the NanoVNA. I was definitely going to try and run it in-line like a SWR meter as seen in videos and such, but now will not. : ) Many thanks to you all for

I calibrated my NanoVNA to the same frequency range as you. Then connected CH0 to CH1. Here are the plots of S21 and S11. My S21 is flat like yours but your S11 does not seem that good. This might be

Reach out to me at jjgalway@... and I will walk you through setup? On Wed, Mar 18, 2020 at 18:19, zfanibanda@...<zfanibanda@...> wrote: Hi all, As the title says, I may be way in

Being a CB'er I must email you a *HUGE CAUTION*, since you are learning about the NANOVNA: *UNDER NO CIRCUMSTANCES CONNECT THE NANOVNA TO THE RADIO AND KEY THE MICROPHONE. Better yet, don't E V E R

Well, there is a WARNING before you start burning things: Contrary to a SWR meter, the nanoVNA can not be used with the transmitter and cannot be left online while using the radio, as a SWR meter is

For my final tests this evening I put a programmable resistor board on the secondary of the 1 to 8 transformer and tried lots of different resistances to see if I could see what the matching

Hi all, As the title says, I may be way in over my head here.... That being said, I'd like to learn more. I bought a NanoVNA after I read a few subreddit posts saying I'd get the best bang for my buck

As mentioned above I wound a 2 to 5 ratio on a BN-73-202 core and terminated the secondary in 330 ohms - this appears to show a pretty good match. The return loss is below -30dB at 7.15MHz and the

Are NanoVNA V2 shipments still able to leave China? I ordered one a week ago on Tindie, but then it occurred to me that flights and ship may not be allowed to land at USA. Does anyone know real news

With my newly wound transformers, 1 to 8 ratio, I now get the following results (see images) when they are placed back to back. As shown in the S21 plot I am getting a loss of 3 to 6dB The matching on

Herb, I've been waiting for the V2 since I read the outlined specification in fall. My main interests are in 20m, 2m, 70cm bands and I'd like to be able to probe 1.575GHz as well, hence my wait for a

I followed the discussion about making BALUNs and the reference to "Beverage Antenna" which was new to me. With the Google I found the Wikipedia page on it and then the US patent application which

I noted the 73 material good LF material but not so good at over 10 mhz. When going for odd ratios adding turns sometimes works better. Or if minor loss is tolerable use a lower ratio and load down to

The reason I removed a bit of a turn (and then called it half a turn) was this seemed to make a better match. Though in reply #11793 I accidentally called it 'one turn' when I meant 'half a turn',

On Wed, Mar 18, 2020 at 10:32 AM, Roger Need wrote: It is my understanding that after you do a Clearconfig 1234 you must turn off the power and after turning the power on do a touch calibration and