Re: Analysing Input Impedance Matching Circuit for the NE602
The NanoVNA output with older firmware is around the levels you posted. With Hugen's latest firmware it goes up to 0 dBm. Let's assume you are using the older firmware and you want to get a test level
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Roger Need
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#11629
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Recommended battery type/size/specs for nanovna-v2?
Please excuse this post if it's been covered previously, but with a nanovna-v2 enroute via tindie, I realized I believe it is not fitted with a battery by default. Is the battery specification (part
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David Feldman
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#11628
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Re: NanoVNA-H new user - can't connect to USB (windows 10)
All nanovna-h sold by us have version number marks on the PCB. Since rev3.4, we have also added version number marks on the shell labels. hugen
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Hugen
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#11627
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Re: NanoVNA-H new user - can't connect to USB (windows 10)
In case it matters - version 0.4.0-2-g7c2f745 No version marking on any of the PCBs as far as I can see (I took off the front and back covers).
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yah_ev
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#11626
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Re: Analysing Input Impedance Matching Circuit for the NE602
Kerr, I have wound these high ratio transformers using FT50-43 and FT37-43 toroids and always found leakage inductance which affected VSWR, Bandwidth and Insertion Loss. I then read about W8JI's
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Roger Need
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#11625
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NanoVNA-H new user - can't connect to USB (windows 10)
Hi all, I bought a new NanoVNA-H on ebay and received it today. It seems to work, but when I connect it to a laptop using the supplied USB-A to USB-C cable, I get a warning "USB device not recognised.
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yah_ev
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#11624
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Re: 70 MHz - 6 GHz spectrum analyser & tracking generator
Hi David, Do you have some information about the maximum dynamic range the pluto can do in sa/tg mode? [email protected]> a ¨¦crit :
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Pierre Martel <petem001@...>
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#11623
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Re: LPF Conundrum -- Eureka...
Ground loop due to residual inductance. EMRFD has a detailed example of what that is and how it can degrade a filter. Experimental Methods for RF Design, ARRL press. Allison ----------------- No
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aparent1/kb1gmx <kb1gmx@...>
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#11622
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Re: V2 Design
#nanovna-v2
Any idea when it is available at Ebay. I am lazy and would not want to open one more account to somewhere.
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Leif M
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#11621
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Re: 70 MHz - 6 GHz spectrum analyser & tracking generator
Are any these able to show close sidebands. Like what happens with 1kHz or 100Hz SSB modulation
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Leif M
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#11620
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Re: Analysing Input Impedance Matching Circuit for the NE602
Thanks for the book page image - this is essentially what I have currently breadboarded up although my toroids are wound for 1.5k rather than 3k. I am going to try removing a turn off the primary side
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Kerr Smith
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#11619
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Re: Analysing Input Impedance Matching Circuit for the NE602
Kerr, Wes Hayward (W7ZOI) did some tests on the NE602 (lower temp range than SA602) and published them in his book Experimental Methods in RF Design. The balance input configuration will give you
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Roger Need
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#11618
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Re: LPF Conundrum -- Eureka...
ground loop or pcb residual capacitance?
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Pierre Martel <petem001@...>
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#11617
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Re: ON7DQ_NanoVNA_Presentation_English
I put it online in pdf because that can be read/viewed by anyone. The pptx format is not compatible with e.g. OpenOffice, and the file is also quite large. If you want the original pptx file, no
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Luc ON7DQ
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#11616
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LPF Conundrum -- Eureka...
...maybe. Since last I posted, I've experimented with a variety of possibilities; none of which worked...8^( But, I reverted back to a message where I mentioned building a filter with half of the
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Chuck Carpenter
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#11615
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Re: V2 Design
#nanovna-v2
On Mon, Mar 9, 2020 at 07:31 AM, <mcebokli@...> wrote: "... I have the cables and standards from the old one, so no problem there."
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hwalker
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#11614
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Re: V2 Design
#nanovna-v2
This is great, just what I wanted: the same device, but with wider frequency and dynamic ranges. I love the smallness of it, same display as before is OK for me. I have the cables and standards from
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mcebokli@...
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#11613
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Re: Analysing Input Impedance Matching Circuit for the NE602
I have been reading a bit more about these matching networks and have found another one I think I will try as well. https://www.ece.ucsb.edu/Faculty/rodwell/Classes/ece218b/notes/Resonators.pdf
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Kerr Smith
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#11612
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Re: Dumb question: What are REAL, IMAG, and PHASE good for?
#general_vna
Resistance (REAL) is a value (at al freqs) and can be plotted on an XY graph on the horizontal axe IMAG is an? reactance value? (L or C) at a specific frequency and can be plotted on an XY graph on
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Gert Gremmen
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#11610
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Re: 70 MHz - 6 GHz spectrum analyser & tracking generator
From: jafinch78 . Looks like Signals Everywhere did an overview of mods in his "Adalm Pluto SDR Tutorial: 70Mhz to 6Ghz and Dual Core CPU Modification": https://www.youtube.com/watch?v=5V6CxTBDHVY
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David J Taylor
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#11609
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