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Re: Question on remote use of NanoVNA
Complete nonsense, I have a BT module tapped to my Nano H clone and there are no issues. BT works at 2.4G, way out of the range of Nano.
By Dragan Milivojevic · #35792 ·
Re: where is the end fed natural resonance
The metallic conducting structure of the Zeppelin served as the "de-facto" image structure (I'm attempting not to further use the term "counterpoise" per my last email on the subject). Dave - W?LEV
By W0LEV · #35791 ·
Re: firmwares
Martin, where can I get your Nanovna-H, non SD card, firmware? I think is very appreciated between the ownwers of this device, as you can get an extra benefit of this old nanovna. When I try to get
By jesus fernandez blasco · #35790 ·
Re: RF output from nanoVNA-H and H4
A nice method using FM detection. A bit of advice. Above threshold the output S/N is linear invert of the RF input S/N. That is, increase the RF level 10 dB and the output noise goes down 10 dB. This
By Lester Veenstra · #35789 ·
Re: where is the end fed natural resonance
Pages 95 and 96 of the 1926 ARRL "Radio Amateur's Handbook" clearly define a counterpoise as a single wire in parallel with and below the antenna wire. By 1952, the Handbook was defining a
By Maynard Wright, P. E., W6PAP · #35788 ·
Re: where is the end fed natural resonance
The "partitioning" of the energy in EZNEC or other NEC-based codes is accomplished through the modeled interaction of launched fields from the conductors of the total structure. As far as a coaxial
By W0LEV · #35787 ·
Re: Question on remote use of NanoVNA
This very subject came to the surface about a year ago. I don't remember any resolution to the question of remoting any of the NANOVNAs via an RF or BT link. Problem is even a radiating BT source at
By W0LEV · #35786 ·
Re: where is the end fed natural resonance
The word counterpoise has no applications in amateur radio, but most times, it is misused and misapplied. I just checked all my graduate and one undergrad antenna references. Nowhere is the term
By W0LEV · #35785 ·
Re: RF output from nanoVNA-H and H4
I'm lucky enough to still have a working signal generator and ancient spectrum analyzer, so I set the generator to output -40 dBm and look at the result on the spec an. to get the gain. It doesn't
By montanaaardvark · #35784 ·
Re: where is the end fed natural resonance
Here is the ARRL policy and on antenna performance specifications in ads <https://www.arrl.org/advertising-opportunities#Acceptance_Policy> One paragraph states: "Antenna advertisements that specify
By Mike N2MS · #35783 ·
Re: Question on remote use of NanoVNA
The problem has been solved multiple times before. Just buy something like this: https://s.click.aliexpress.com/e/_DC0X5qz (BT) or this https://s.click.aliexpress.com/e/_DlbJOjb (WIFI), connect the
By Dragan Milivojevic · #35782 ·
Re: where is the end fed natural resonance
?Did any of you read the material I posted about the definition of a counterpoise? Both ARRL Handbook, Cebik, Laporte, and Rudy Severn make it clear a single wire is not a counterpoise. I will try
By Ray W8LYJ · #35781 ·
Re: Question on remote use of NanoVNA
Andy, My suggestion is to Email Ward, AE6TY, and ask him how he did it. John, W0GN
By John · #35780 ·
Re: where is the end fed natural resonance
Ok, the coax shield is essentially two wires, so how does Eznec determine how much current is flowing in each wire? I think there is something about Eznec I don¡¯t understand Ray W8LYJ
By Ray W8LYJ · #35779 ·
Re: Question on remote use of NanoVNA
I searched a bit more changing some wording and can back to an old thread here. /g/nanovna-users/topic/wireless_control_of_nanovna/70124668?p=Created%2C%2C%2C20%2C1%2C0%2C0&jump=1 So
By Andrew Harman · #35778 ·
Re: Question on remote use of NanoVNA
See this: http://ha3hz.hu/images/download/HC-05_preparation-for-connection.pdf
By DiSlord · #35777 ·
Re: Question on remote use of NanoVNA
I have the "H" model. I searched for AE6TY and SimSmith and found a groupsio page, nothing immediately specific to the subject. Looking at the BT to serial converters online it looks like they are
By Andrew Harman · #35776 ·
Re: RF output from nanoVNA-H and H4
Hi Zack One way to tune the preamp to best system Noise Figure is to feed a weak CW signal into the Preamp and your radio.? Put the radio into FM mode.? ?Adjust the preamp for best FM quieting.?
By KENT BRITAIN · #35775 ·
Re: RF output from nanoVNA-H and H4
I use at least a 40 dB attenuator on the input with preamps. I mainly want to scan the preamp to see where the passband is. If the preamp can be adjusted, I adjust it so the passband is centered on
By Zack Widup · #35774 ·
Re: RF output from nanoVNA-H and H4
On Auto, if the LNA maintained linearity, it would deliver 3 watts back into the NanoVNA. NOT RECOMMENDED! Safe guess the LNA will limit, but could still be enough power to damage the Nano. You really
By KENT BRITAIN · #35773 ·