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OK, yes, I can see

Hi Zac Sorry, Here i meant by coax resonant freq the freq that Give 1/4 lamda electrical length or zero impedance on smith diagram , coax supposed without terminaison . 73s

Rain gutter: i sometimes use my (horizontal) rain gutter, with its two vertical downspouts, as an antenna, at low power such as for WSPR. I feed it with a 9:1 balun (for 20 meters) and with a 1:1

* * * * *???? Multi-Band? HF?? Vertical* * * *In an effort to get a?? VERTICAL ANTENNA ? up for the 20/17/15/10 meter bands, I tried setting up a 14 ft vertical antenna* *made from old

Your coax is only going to have a "resonant frequency" if it is terminated in a very high SWR or a load with a very high or low impedance, such as an open or short. If the load is somewhere close to

Since you asked what we think - I think this: For amateur radio use, there is no reason that I know of to have high accuracy in the measurement of cable impedance. It may be fun for an intellectual

for my saa2n i have cal standards with plugs (male connector) .. but i wanted also female (so i can calibrate at cable end with a plug without double female needed) so i took 3 N sockets .. one with

QUOTE: ....a DIY fixture can be made using a female SMA connector with its centre conductor sawn to the same level as the dielectric. ..... *** You can buy such a connector with no need to

Wanted to add another "thank you" for posting that information. I've had nanoVNAs since they first emerged (2019?), and a ham friend recently gave me one dated from that era. Had never been updated,

Hi DiSlord Coax Zc measurement function, already installed on H4 1.2.40 firmware, seems need to measure C0 capacitance @ 100Khz and the f0 first coax resonance frequency (Hz) and then we

Please post the .s2p file. I'd like to calculate results using the Y21 method that suppresses stray, shunt capacitance in the test fixture. Brian

Indeed, the HP16092A is the butt end of an APC-7 connector, with just 3mm of the centre conductor protruding beyond the insulator. It has an advertised max freq of 500 MHz. I agree with Dave that a

Hi Dave, 1- I've upload the Kicad project as a zip file. 2- I also upload a PDF showing this part of the schematic and layout with different zoom levels in case you can't download or open the Kicad

Howard, I used the SMA to SMA jumper cables which came with the Nano VNA and calibrated using the open, short and load connectors ( https://youtu.be/qb38VI-9tV0). Then I used an SMA to SO239 adapter

Well, simply put: First, do an OSL calibration for the range you want to use, and store it in one of the memories. Then select Display > S11 > SWR. It should then display the SWR of whatever is

"NanoVNAs Explained" by Mike Richards G4WNC is the goto book you need, available from a number of Internet shops. 73 DE G4SDW Gareth

Welcome to the group! The archives of this group contain much good information including videos and a guide for the VNAs for DUMMIES. Those resources should get you going. Dave -

Hey guys just got a nano VNA. it is a "seesii, nano VNA-H. I need some help in setting it up to see the SWR on some antennas. I have gone through the various manuals and the one that came with it,

1- Would you recommend to clean all 3 elements of the matching network, as I don't know which component will go where ? Can you send me a schematic of the matching network? Possibly I can figure it

Dave, Thanks for the hint. 1- Would you recommend to clean all 3 elements of the matching network, as I don't know which component will go where ? 2- If you look at the trace between the