开云体育

Here's the pdf:

はぁ (ha), that did the trick. I did the surgery on only one leg so there is still some imbalance, but the directivity improved from 8dB to 16dB, on par with the performance with tuning (see

The S11 plot is attached...not pleasing at all. VNA measurements require phase stables cables. The ones I use for microwave use (upto 26.5 GHz) are 24” long and cost $5000 a pair. The changes in

Hi Peter, go to my website and read more about this topic (ha3hz.hu) 73, Gyula HA3HZ

Hi Gabriel, As an experiment, you could try to make a more symmetrical balun by placing the core vertically over the pcb and making sure the wires have equal length. Another request, could you publish

From: Robin Midgett I've calibrated my NanoVNA & connected it to an approximate 350' length of coax with a known good dummy load on the opposite end. The S11 plot is attached...not pleasing at all.

For an N connector, the seller must have an adapter option with a calibration kit. My counterpart. It is very convenient to work. And the BNC option should be similar. It solves many technological

Please forgive me for using Chinese reply.

Hi Jeff; Per my post: @ Gary O'Neil - /g/nanovna-users/message/9184 I don't find any source of disagreement in your posts: @ Jeff Anderson -

Thanks Dave, I'll try that soon..hopefully tomorrow evening.

Hi Clyde, Thanks for the quick response. Here's a plot of the dummy load across the same span....looks good to me, but I'm here to learn from others. I haven't tried VNA Saver yet...would have to

Thanks for the follow-up Chris. I ordered on Friday and pretty much followed the same procedure although I have not communicated with her since I sent the payment because they were already well into

Port 00 or Port 01, that used for one-port measurement of s11, may not be a good 50+j0 source over your frequency range. You exhibit everywhere better than 15 dB return loss which is pretty good, but

Sorry, didn’t notice your question till now. I started a chat with “Maggie King” on the Alibaba site via hugans store on their. I simply let her know I would only purchase via a paypal payment.

Additional info...it's a piece of 1.25" hardline, and the response is much worse going up in frequency; ~-5 return loss at 146 MHz.

On Sun, Jan 5, 2020 at 11:22 AM, <nanovnagroup@...> wrote: > > Amazon has become a disaster. You never know from whom you are getting the > product even dough you might have purchased from a

Most rf lines like low density foam has a spec return loss of about 20 db.

Did you put the load on the output of the VNA? This looks somewhat normal but the return loss is a bit marginal. I am curious about the return loss of the load by it self. Do you have the VNA saver

I've calibrated my NanoVNA & connected it to an approximate 350' length of coax with a known good dummy load on the opposite end. The S11 plot is attached...not pleasing at all. Can anyone on the list

Hello again Erik; @ Erik... - /g/nanovna-users/message/9167 @ Erik... - /g/nanovna-users/message/9166 @ Jeff Anderson - /g/nanovna-users/message/9158