Jan 2, 2024 · TRX Bench shows VNA CH0 output is split thru 2x 25 ohm res to shield and center conductor of the choke and then the choke output is recombined thru 2x 25 ohm res to VNA CH1. The other shows a similar fixture, but without the resistors.

YouTube video where this test fixture is used. VNA CH0 output is split thru 2x 25ohm res to shield and center conductor of the choke and then recombined thru 2x 25ohm res to VNA CH1. I have seen test fixtures like this but without the resistors. Can someone please explain why the resistors are used? Why 25ohms? Thank you.-- *Dave - WØLEV*--

May 12, 2020 · I use a crystal test fixture that I built for the Poor Ham Scalar Network Analyzer (PHSNA) and I used it very much with good success with the nanoVNA also. It consist on two 50 to 12,5 Ohm broadband transformers with resistive attenuators at both ends to insure correct loading and adequate drive level for the crystal.

May 16, 2022 · The nanoVNA provides reasonable reactance measurements for most of the needs of a radio amateur. In cases where better accuracy and precision is required, a well calibrated laboratory VNA should be used with an appropriate test fixture.

I made a fixture for my NANO VNA that provides electrically solid and repeatable connections but prevents damage to the rather delicate SMA connectors on the...

Does using a more formal test fixture with the nanoVNA result in better measurements when testing inductors and capacitors to confirm their nominal values? ...more.

With A Nano VNA the attenuator can also adapt the measuring reference in the test fixture to be a different value from 50 Ohms as long as the new value is included inside the fixture at the measurement plane for the S-O-L calibration.

Some of this information was moved and updated from VNA Bridge and Support Circuits. I will have a limited number of PCB's available for all of the projects on this page. Still have a few Miniature Step Attenuator boards available too. Revised & New Information. Series Fixture for VE3NEA Ham VNA1.1 SeriesFixture_06102014.pdf

homemade "thru" test fixture for vna (504 thru fixture) reference: crystal motional parameters a comparisons of measurement procedures" by: jack r. smith k8 zoa 11 june 2006 we will cover : measurwl co meters or nano wna measuring rm nano una - measuring lm & cm using:-63uur method couter-phase shift method nano una. -3db method series ...

This is intended to get anyone going with a Nano VNA from the absolute basics to being able to turn it on anywhere and immediately read the SWR, resistance and reactance. Feel free to leave...