开云体育

Ok, understood, but a picture would help to clarify it. -- El software de antivirus Avast ha analizado este correo electrónico en busca de virus. https://www.avast.com/antivirus

The BN cores aren't actually toroids, they are "balun" cores or "binocular" cores that have two holes through them. So, if you wind through only one hole, you have a half turn.

Thanks, this is what I was trying to figure out. And thanks for those files! -- KV0A - Robert

hi Kerr, I really don't understand the 0.5 to 8 ratio and the "full turn" comment. In toroidal cores, one pass through the hole counts as a full turn, there are not things as half turns, so probably

To this reply I have attached the images from my NanoVNA, there are two VSWR plots and two smith chart plots. When using the FT37-43 toroids on the input and output I get about a 1.58 to 1 VSWR at

I have received my new toroids (BN-73-202) and have been having a look at the difference between them and my FT37-43 ones. In this reply I have attached three images. The first is the NE602 with an

Well, I think that the right number is? 1000000 or 1E6 Regards, Ignacio EB4APL -- El software de antivirus Avast ha analizado este correo electrónico en busca de virus.

Thank you Herb! I've made note of your instructions. Rick

Dear Luc, Before, congratulations for this nice presentation. On page 52 (TDR measurement), there is a small typo error with the example in the formula. With 1 MHz frequency step, divider must be

On Mon, Mar 16, 2020 at 06:37 PM, Hernán Freschi wrote: Hmm that seemed to work! I wonder why? ============================================= Hernán, That shows that your cable is o.k., CH0 is

Hmm that seemed to work! I wonder why?

One more thing to try. You can do a thru calibration without doing an OSL calibration if all you are interested in is the S21 loss/gain. I often do that if I am checking an attentuator or filter over

Yes, I was doing that too. I also did as Roger suggested and hit RESET several times with no luck.

Hernán, Ensure that you do a "CAL->RESET" before you do the OPEN, SHORT, LOAD, ISOLATION, THRU calibration. Skipping that step can result in a bad calibration state even though all screen indications

Are you doing a RESET before Calibration. I find sometimes I have to touch RESET a few times to perform the operation. Roger

I had tried with another set of cables with the same result. I measured the cables not connected to anything and on DC they measure fine. Connected to the VNA both read 50 ohms (DC)

Check your cables with an ohm meter (DMM). Your photo is fuzzy but it looks like you have a short.... Roger

I recently tried to measure the loss in my cables for HF ham radio. I did the calibration steps, but when I do the THRU calibration, after calibrating the CH1 LOGMAG line isn't flat at 0dB. It looks

Hot on the heels of his beta 0.8 firmware release for the NanoVNA, DiSlord has followed it up with an additional beta firmware release which adds user selectable averaging via a "DISPLAY->BANDWIDTH"

Regarding, "...am leaning more toward the -F because of the IPS display being (much?) more visible outdoors (in bright light)." Although it is cloudy so I cannot do the experiment in sunlight just now