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@ qrp Thank for the info. Seller did mention right information (without battery) & i opted for it because of restrictions from customs dept. for clearance of items with battery.

it's better to perform 32768 points IFT for TDR. But I suspect it will not fit into the chip memory :)

drkirkby@...> wrote: What I meant to say is that changing the system impedance doesn’t change the efficiency of the antenna. You change the efficiency by changing its losses. Dave

Thanks guys - I got it corrected and have posted the new result to the link listed above. The fix was that I have to recall the saved cal data each time I change the sweep. I calibrated the nanoVNA on

SWR and resonance are not the same thing. An antenna can be resonate but have a VSWR of 100:1. Another antenna may have a 1.5:1 VSWR, but not be resonate. Efficiency = good antenna is a matter of

Thanks for info. Is it safe to solder it with heat gun? It seems that the plastic parts can be damaged.

I got NanoVNA with 3.7V 450mAh battery It has code 602040 and no other identification. But NanoVNA works 2 hours from it. My shipment is delivered with air mail. So, it seems like your seller provided

Mouser has a 600 mAh Renata ICP622540PMT for $17.79 (USA only) and I might buy that, since I know it will be good, if I can't find a cheap MP3 player with a suitable battery in it. Bear W5VZB

this is exactly the document that I had read, thank you

HI qrp.ddc, this is the replacement OEM joystick recommended on the wiki: https://lcsc.com/product-detail/Multi-Directional-Switches_Korean-Hroparts-Elec-K1-1502SA-01_C145915.html this one is also

I added a Goggle translated user guide (NanoVNA_manual _ch045) to the "Files" section of this group. Full credit and appreciation go to Hiroh Satoh (user "ch045"). The untranslated version can be

Bruce, I added the full Goggle translated user guide (NanoVNA_manual _ch045) to the "Files" section of this group. Again, full credit and appreciation go to Hiroh Satoh's (user "ch045").

Ok, thanks I'll focus on transmitting then as it generally goes that an antenna thats good for transmitting on a certain band will also receive on that band ;)

John, The first step before performing the OSLT (Open-Short-Loa-Thru) calibration is to select "RESET" under the CAL menu. Neglecting to do this can result in the -10dB offset you are seeing.

@Reginald Beardsley via Groups.Io : /g/nanovna-users/message/2927 /g/nanovna-users/message/2948 Hello, Allow us, please, to point out that frankly we are not sure if

the only issue that I have with NanoVNA bought on aliexpress is the switch (joystick). It seems that I got defective joystick, because it is often triggers push when I'm trying to make right turn. The

I bought the NanoVNA from eBay - not that it makes much difference. Lithium ion batteries can fail with catastrophic consequences. I know that the switch on the NanoVNA is of appalling quality, but I

I bought NanoVNA on aliexpress in this store: https://www.aliexpress.com/item/33016805196.html It comes with battery - 602040 3.7V 450mAh. The battery includes protection module. I tested it, NanoVNA

David, yes, SWR (resonance) is fairly pertinent for an antenna. But once again, this does not say, if this is a good antenna or not. Efficiency = good antenna is a matter of antenna gain and resonance

@erik@...: /g/nanovna-users/message/3008 Hello, First of all, allow us, please, to express, on the occasion, our deep respect for your impressive Work with NanoVna. Next,