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I reiterate, my V2Plus4 puts out ~140 microWatts = 0.140 milliWatts ~= 300mW/2000 ~= 33dB down from 300mW. That's the fundamental. The 3rd harmonic is roughly 15microWatts My MFJ antenna analyzer puts

My experience is with 40mw Cw at 28.060, on a minibeam I contacted most of the continental USA using only 4 "AA" batteries during peak solar condx. 8 milliwatts into a gain antenna would probably do

It is possible that the touch screen is being squeezed by the housing, try opening the housing.

Try disconnecting the battery for 30 seconds and then fully charging it? 73, Willie N1JBJ

With 300 mW of FM on 70 cm, I can put a good signal into a repeater 50 miles from me. 73, Maynard W6PAP

Thanks, Jim. Those are the types of off the wall ideas I'm referring to. Kind of the old 'Whack on the Side of the Head' (Roger Von Oech) type of thinking. Great book series by the way.? Cheers,?

When I turn the power on I get a blank screen with only START 50.000kHz, STOP 900.000 000 MHz and on the left side C0 D R S T Pa with no swr no smith chart just blank Touching the screen does not

Jim wrote: “They have kind of a weird terminology in that business: analog and digital antennas, for instance, because for them "antenna" is basically the "sensor, including the RF stuff".” I’ve

That depends on the penetration depth, etc. We used something very similar to the NanoVNA (a few mW output, stepped frequencies over 100 MHz range at 3GHz) to detect human heartbeats and respirations

You might see it more easily on a waterfall, just like ionosondes. If you've tuned a narrow band receiver, you might hear a periodic tick as it sweeps past. There are all kinds of monitoring systems

Another waterfall display application would be time history of EM properties of something under test as temperature changes. For instance, a VNA makes an interesting way to measure liquid water

Having worked with GPR, that little box is 40 or 50 dB shy in power!? hihi WA5VJB

On 8/3/21 11:16 AM, David Eckhardt wrote: > I can't imagine what a real time waterfall could do which is not already > provided! SWR? Just watch the Smith Chart. How would it apply to TDR >

Milliwatts coming out of the NanoVNA. I'm sure it can be detected if you knew what to look for - in fact, you could use it to send messages by controlling the step size and step rate.? The same is

My venerable MFJ-259B antenna analyzer puts out ~8mW. I get a 200mV peak to peak square wave out of my V2Plus4 into 50ohm. I believe that corresponds to ~140uW in the fundamental and ~15uW in the 3rd

Hi DiSlord, I would like to add to my SAA-2N SD card slot, the PCB 4 "display is ready for SD card slot. However, the pins are not connected, only the power supply (jumper must be added). Some SD card

Believe me, when I connect the HP 8753C VNA to an antenna, the results are definitely registered on any receiver or spectrum analyzer also connected to any sort of antenna, even a clip lead!! There

It would seem to me Randy and Larry that if the nanoVNA were connected to (example) a Log Periodic at 100 feet and the sweep were set from 100khz to 30mhz that it may be impossible -not- to create sky

Here is an online applet that illustrates what the resulting square wave looks like as you add terms to the series: https://www.intmath.com/fourier-series/fourier-graph-applet.php Play with adding

In case you are not familiar with what it takes to generate a square wave, consult Mr. Fourier and the Fourier series. A square wave contains all odd harmonics of the fundamental frequency. So, if you