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Bob,You don't need a torque wrench for this device - it's just not that critical IMO.?An alternative would be the small 3d printed rings that were discussed a couple of weeks ago.?Also, take the

Hi Yes that's great that we can now look at all these components to see just how good they are/,were. Carry on and publish your results. We will all be interested I'm sure. A

I just measured about -10 dBm into 50 Ohms at both 100 MHz and 10 MHz.? Not enough to be illegal. Bob

Hmm. I measured 100mV PK-PK into 50 ohms at 50 kHz. My scope drops off at high frequencies (as do all). Output is, of course, a square wave. ? A [email protected]> wrote:

Several years ago I investigated potentiometers with the lowest possible reactance up through 30 MHz. I found the Allen Bradley TYPE J and specifically a 1 k ohm P/N JA1G044P102B exceptionally good.

Well Herb I have no idea how to upgrade the firmware.? I do have the sharp program on my PC if that helps. Anyway I am having a blast with this amazing unit.? I can't believe it's basically as good

Hello Rune, If you haven't done so already, please add my name to your list of Alpha testers if you would like. I will be testing on a Dell Laptop computer running Windows 10 and an iMac under Mojave

Bob, If you ever decide to upgrade your firmware you may run into something similar. My second NanoVNA arrived with only the 2 trace firmware installed. When I tried to upgrade to the 4 trace firmware

I made a page about this: https://oristopo.github.io/nVhelp/html/bridge.htm Basically, unbalanced bridge sensitivity is non-linear; for bridges balanced @ 50 Ohms, signal amplitude difference from 0

In reality, USB does not work that way. Here are "real" supported USB speeds: USB 1.0/Low-Speed: 1.5 Megabits per second (Mbps) USB 1.1/Full-Speed: 12 Mbps. USB 2.0/Hi-Speed: 480 Mbps. USB

What is the Z range of the NanoVna? I characterized a 500 ohm pot with another Z instrument with the pot set to 500 ohms. At 10 MHz the pot looked something like a resistance 480 ohms with about 80

Hello Rune- First, thanks for the very useful NanoVNA-Saver application! Earlier in this thread you mentioned setting the data rate at 115200 bps. This is 2nd hand information- somewhat anecdotal- but

Herb, You nailed it!? I did the reset and calibration and now the unit works! I am not so delighted with what I see, as it isn't that close to my static measurements.? However, the unit now behaves

Thanks for asking the question. I am familiar with them methods of old. Like sala nimi outlined. The R ch and the A and B ch's are down converted to a low IF and these are applied to the inputs of

Hi Bob, You will find everything in the forum Wiki and Files. Calibration is probably required, please read the latest manual on how to do it. There you can get answers to many possible questions. I'm

I haven't looked in detail at the nanoVNA method, but normally you would mix down to a low frequency and do IQ sampling. This is a complex number that can easily be converted into a magnitude and

I understand how a (Wheatstone) bridge gets a voltage or magnitude relative to reactance difference. But how does it get the phase of the that vector. I think there are some hard ways of getting that

Bob, One other thing to try before you start looking at the hardware. The first NanoVNA I bought came pre-calibrated and was ready to go out of the box. A second cheaper NanoVNA that I bought came

Any time you push new F/W to the device it is good practice to re-cal the touchscreen. Now, with that said, I just updated one of my units and found the touch surface was still calibrated. So - if you

Hmm. Can newly installed firmware detect that it has never been touch screen calibrated and automatically start in TOUCH CAL the first time?