开云体育

I found the same case that Terry VK5TM did on eBay, item 174039026524. Looks like an interesting case for the -H. The listing also led to this: https://www.thingiverse.com/thing:3818979 73 -Jim NU0C

On Tue, Dec 17, 2019 at 04:42 PM, <bing-wang@...> wrote: Anybody know how to set negative value for reference position. For example, -20dB. seems the num. keypad does not have "-" symbol.

Thanks for the update. Could you use a more robust switch like that on the NanoVNA-F? Looking forward to getting a unit. Mike N2MS

Hi Bing Wang Reference position is the grid lines from lower Line = 0 to top line 0=8 Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] <[email protected]> P? vegne

On Sat, Dec 7, 2019 at 09:06 PM, Clyde Spencer wrote: In the TDR display there are two traces, One Red and one blue. I understand the red but not the blue. Would some please give me an explanation of

Anybody know how to set negative value for reference position. For example, -20dB. seems the num. keypad does not have "-" symbol.

Reminds me of the rising edge of a square wave pulse, That's how i measure TDR using fast edge pulse from Schmitt trigger inverter and oscilloscope. Alan W2AEW has good youtube video on it.

Clyde, I had the same question. Maybe the author of the software or someone else will reply. Roger

Any chance you can add the option of rotating the display graphics 180 deg? I can see the cables coming out of the bottom being a nuisance in some instances. And please get rid of that ridiculous

You are correct Alan, I was too hasty in my enthusiasm.? And when the result is pure resistance there is resonance.? At frequencies above self resonance an inductor acts as a capacitor. Which

I would also like to add my voice to the many that would want to purchase this with a larger screen. How does the larger screen you may or may note use compare with the 4.3" on the NanoVNA-F? The 4.3"

However, the result of distributive C for an inductor which is one appropriate model, shunt C, leads to an inductor value which INCREASES as we approach SRF. The arithmetic for this is; Xt=

Thanks Bob. I'll give it a go. Martin K0BXB [email protected]> wrote:

On Tue, Dec 17, 2019 at 10:40 AM, Dale Parfitt wrote: Thank you Herb, So much traffic, I missed the specs. ==================================================== Dale, I'd like to add a correction

Roger, it's really very easy to make your own cables. There are SMA connectors that use the 'solder the center' and 'crimp the shield' type of construction. I use this method on all my connectors,

One addendum regarding inductance.? I did mention that 50 kHz as a low limit prevents measurement of large inductances. I just measured a few and got good results up to around 50 mH.? My inductance

I have read numerous comments that state that the quality of the cables supplied with the NanoVNA is poor. However Hugen has supplied good calibration terminators in his NanoVNA-H in the gift box

@Gary O'Neil, N3GO - 17 December 2019 /g/nanovna-users/message/8320 - O K ! -

Great stuff. Sorry if this has been answered elsewhere but are there plans for Bluetooth? Thanks, Brian WB8AM

Thank you Herb, So much traffic, I missed the specs. Dale W4OP