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Is anyone interested in an extended back cover for the NanoVNA? I designed and printed a sample it has a 6mm deep "pocket" that is 71mm X 40mm. Should be big enough to double sided tape a bigger

I just ordered 1 from Banggood preorder, I hope this is the correct one to make sure Huegen gets paid for his work

Several discussions with my ham colleague Gary, N3GO and wrestling in a quite area, I believe I have ONE approach that works well and is consistent with proper results. The main items to note: Only

You know, of course, that the signal out is a square wave. According to the schematic, the Si5351 feeds the output directly through the resistor bridge..

I believe that's exactly how they have extended the range of this instrument to 900MHz: by using the harmonics. otherwise Si5351 is only rated up to 200-300MHz. This is the same principle used in

I was interested in the performance of the output signal. So at first I measured the output power: 10 MHz -12,13 dBm 50 MHz -12,57 dBm 100 MHz -13,21 dBm 200 MHz -14,85

This is a very interesting group. I am not a radio expert or hobbyist. I am using vector network analysers to make biological and chemical sensors from piezoelectric resonators ranging from 200MHz

This is the highest filter I had from the junk box without exceeding the limits of the instrument. The next filter up was centered at 902 MHz. So trying to get a sense of measurement DR would be a

Thanks Larry, Yes... understood. My acid test so to speak was the 1 dB pad shorted which resulted in a Gamma of 0.86. I found the white unit quite good and published the polar response in a prior

Hi Alan, I've got the antenna analyser firmware installed and I'm not really using the device for S parametric testing. My 'lower noise' comment referred to a quick & dirty test (I'm at work so can't

Hi Larry, thanks for the inputs. Can you elaborate on the statement: big difference in noise levels. The second photo shows a closeup of the installed shields - big difference in noise levels! If

Hi Larry, You can also add solder points to the SMA sockets. On the black NanoVNA they are welded on both sides, but only one PCB side is soldered on the white NanoVNA. David, F4HTQ.

I have been hacking my Gecko unit to add shields and I also decided to add an SD card slot I removed from an old Blackberry cellphone. As I mentioned in a previous post, old 2-way radios and

Hi Ernst, I have updated with nanoVNA_800_aa_20190705.dfu and no more spikes are present. Thanks. Georges.

I have not taken enough 1 port data between the two to state their measurement delta if any. As far as I can tell, the white unit is no different electrically other than the firmware, 2 track display

Oh well, I guess I spent money for naught?? Maybe I'll save them for another project. I'll check the date code, they still could be old stock Thanks Frank

I looked at the part, and they are 602. I'll replace them and add shield cans (there are none) and I paid $75 for this one. Oh well live and learn

Hi Georges, those peaks are from the ocsillator circuit. Hugen - great thanks to him for immediate action - has released another firmware nanoVNA_800_aa_20190705.dfu and nanoVNA_800_ch_20190705.dfu

Hi Ernst, I have the exact same 300MHz, 600MHz peaks. I'm actually trying to full charge the battery before making any measurement. I suspect the LiPo switching battery charging circuit to generate

My white version. I added the RF shield cavities using kapton tape to isolate the electronic and coper foil as RF shield, soldered in each corners. No more signal variation on the mixers when