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Good to know about the limitations in the VHF UHF domain. I'll keep that in mind when testing for now I'll mostly stay in the HF domain trying to analyse my "future" EFHW antenna. I guess as you said

Those are good up to ~100MHz, really useful for all sorts of small components. Don't overpay for it, these usually go for ~$3: https://s.click.aliexpress.com/e/_DB7YAkD A really useful addition when

You don't need "precision" resistors. "Close enough" like 47 or 51-ohms for a 50-ohm non-inductive resistor. The most importance consideration is that it's non-inductive. Dave - W?LEV

*Now down to two HF antennas at new QTH at Crosslands Retirement Community (Kennett Square) SW of Philly* * * *Still have major high noise level from 1-10 MHz? and? working to solve it. * * * *1)?

Gervail: Thanks for the tip*. There really is NO definitive, easy-to-understand users' manual for the NanoVNA-H4. There are many YouTube sites that you can find. I've looked at many of them as I

Really interesting document, I'll definitely try to reproduce the steps and I will be really happy if I can make it work. And also really nice little fixture. I did a bit of digging and found this

<snip> Mike C. Sand Mtn GA

The attachment should at least get you going. Dave - W?LEV <gervail.antoine@...> wrote:

Terminate port 1 with a 50Ω load, measure S21. Add ~10db to the trace and more or less you get your safe limits. <quineatal@...> wrote:

Nizar & Don... Thanks. As different as they are, both are helpful answers. ???

For a 20dB attenuator, none. 73, Don N2VGU

Hello guys, I'm new here and I'm having a hard time figuring out how to use my NanoVNA to measure those things. I made a search in the group topics but it's always about the results and I can't really

Hi Matthew Good and nice question : it seems to me that harmonics are less reproductible than fondamentals of the LO , so it should have more erratic behavior then calibration will not stay as good as

Can someone describe the impact of the H4 clock rate on a measurement? An example: I do an S21 test on a 20db attenuator sweeping 401 points from 1 to 900 MHz (the VNA calibrated across this range).

For all frequencies above ~300MHz H4 uses harmonics of the clock generator so it hurts the dynamic range. [email protected]> wrote:

the h4 (or other "older" nanovna models) have a clock up to 300 megs and up to 900megs or 1.5ghz is done with third or fifth harmonics the newer V2, saa2n etc.. are made with a clock up to 4.4ghz or a

No. All of the vna models I am aware of have only one. The MS vs SI chip is really an 'available supply' issue rather than a performance one. The firmware selection is to accommodate whichever one is

Can I ask you to explain further?

https://www.amazon.com/hz/wishlist/ls/3DN6GKKJS0HZH?ref_=wl_share This is a list I generated when i was trying to sell my employer on getting one or more. There are some super cheap bare knuckles

H4 is a wrong device for that range. <ray@...> wrote: