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Your two EXTREMELY short whips configured as a horizontal dipole will have very high losses and low efficiency? because they are physically short. Even though the whips load the elements to achieve

On the whip - loading coils.... The (B)and(W)ith of an antenna is determined by it's (Q)uality factor, thus of the R L and C components that make an antenna: L by the length of the whips C by he

Well, now the answer is beyond dumb ;<)) If you put a signal on a coax, it will start traveling along, very fast but not infinity fast. If it reaches the end of the cable there are 3 interesting

I know its narrow band but just its for a spot frequency of 3.775Mhz,heres some more pics of it and screen shots of it on my foxdelta analyser.also a couple of pics of my verticle.73

All explanations above are right. However there can be a confusion when looking at what is really displayed by the NanoVNA. REAL and IMAG parameters are not the samething as RESISTANCE and REACTANCE

Using mobile whips it will be rubbish. Its not a dipole - its 2 loading coils

A decent spectrum analyzer would need good image frequency (and spurs) suppression. And it would need a much faster ADC because a 5 or 10 KHz bandwidth is way too low to be useful. I need a real time

Although, thinking about this a little more - there IS alot more space for enhanced firmware on the new V2 board which uses Analog Devices freq generator chips so additional functionality -might- be

Not really worth it when there are countless RTL-SDR dongle projects that allow you to do this already on the cheap. https://www.google.com/search?client=firefox-b-d&q=rtl-sdr+spectrum+analyser

is there any plans to make a spectrum analyser along the same lines as the nanovna?,seems to me it would be a winner.

The first 2 pics look OK, but then you did something wrong to your VNA. Usually 80 m wire antennas are very narrow and cannot cover the complete 80m band. To make it broadband use multiple wire

Ive had this issue a few times on win 7 sp1,seems the windows updates screws the drivers up,normaly reinstall the st whatever it is driver and then it works,not sure on win 10 tho as i hate it with a

hi all i have a 80m dipole set for 3.775 Mhz,it seems to work rubbish,ive just done some adjustments,,take a look at the pics of it on the vna,does it look ok,views welcome,cheers m3vuv.ps,forgot to

The trace capacitance is ~ 6.5 pF before and after the modifications. The inductance is 0.046 uH. Insignificant? The PCB is small, 17mm x 25mm, not much trace area/length. Allison, The only examples I

A bad cable is among the first things to suspect.

From: Pierre Martel Hi David, Do you have some information about the maximum dynamic range the pluto can do in sa/tg mode? ==================================== Pierre, I've not seen any specifications

From: Leif M Are any these able to show close sidebands. Like what happens with 1kHz or 100Hz SSB modulation ================================ The minimum receiver bandwidth range is currently 2 MHz,

I have discovered that this happens and everyone tells you the problem has been solved. But when you try all the fixes, it still does not work! It seems that the WIN10 virtual comport gets confused by

Thanks, Dragan - clearly seen on the web page! Parts ordered... Dave

Recommended capacity and dimensions are listed on tindie page. wrote: