开云体育

Sounds like a calibration issue. Mine will correctly show 1.1:1 numerically and graphically, I just checked. 73 de Andy

Hi All, I have been subscribed to this group for quite a few weeks now, but this is my first posting. Why? Because it has taken me that long to read through all the previous posts! Anyway, I have not

this "jitter" is just because phase has noise. The phase is limited to -180 to +180 degree, so when it come to -180, you will see jump to +180. Unwrapped phase will not have such "jitter"

I think you can use 220 Ah battery (220'000 mAh) and it should works ok

Hi David, The .dfu files are used to flah firmware into the? NanoVNA device, you can do that with DFUseDemo software from STI under windows. Regards Jos Op 14-11-2019 om 23:38 schreef David Eckhardt:

Thank you Gyula for the information. I didn't replace any components. I received this complete device with this plug included and without a diode D2. Ok, I'll desolder the connector and will solder

I think the frequency of the cross point of those curves is the most important parameter? Trimis din Yahoo Mail pe Android Pe vin., nov. 15, 2019 la 0:06, David F4HTQ<f4htq@...> a scris: Hi

Based on the pictures, the socket soldered to the pcb has a 1.25mm plug and the battery has a 2.54mm plug. I suppose you replaced the power plug with a smaller one so that the D2 diode could be

HiCan you plese advise the whole procedure and test fixture to identify and characterise unknown ferrite cores with nanovna? ?73 de YO4AUL? Trimis din Yahoo Mail pe Android Pe vin., nov. 15, 2019 la

just desolder connector and solder wires directly to the pcb. My NanoVNA don't have battery connector at all.

Hi myy NanoVNA was shipped w/o a battery. Thought that's no problem, opened the back cover and realized that my battery doesn't fit into the connector which is installed on the board. You can see it

Dave, You are very welcome. :-) -- Rune / 5Q5R

Hi Nan VNA2180 that Steve used have 50 ohm impedance on both ports (A & B). So those formulas will work if vna ports of NanoVNA have 50 ohm impedance. But do they?

The crossover point between the real and imaginary part of the complex permeability is a good marker on the usable bandwidth or upper application frequency for the ferrite. Obviously the higher perm

I am retired and I like to learn new things. I am a ham and l like experimenting with antennas. I am interested in xfmrs for efhw antennas. I have a VNWA and thought it would be fun to play with the

David F4HTQ wrote: "finally I do not wait for the weekend :)" ------------------------------------------------------------------------------------- The test method you described seemed simple enough

Because I am new to all this, I'd need some specifics about that. This thread is comparing what is apparently two VNAs from different Chinese sources. I will pull the case in a few days and compare

Check out e-Pay. You can get 50 pcs for $1.25 AND free shipping. 73, Dick, W1KSZ ________________________________ Sent: Thursday, November 14, 2019 5:34 PM To: [email protected]

As Herman said, they can be had on eBay https://www.ebay.com/itm/50PCS-Slide-Switch-SK12D07VG2-Toggle-Switch-2mm-Stents-Toggle-Switch-BBC/142724639312?

finally I do not wait for the weekend :) This is the curve for 61 http://alloza.eu/david/WordPress3/wp-content/uploads/2019/11/image-3.png ( one turn of emailled wire on BN61-202) There is the