Fully documented RX 9 Circle Array

We will be completely re-measuring the 9RX, this time ensuring everything is fully documented. You can find all my measurements under the RX9 2026/27 tabs. These will be updated on a regular basis. Thanks to an upgrade of our measuring equipment, we now have enhanced capabilities to measure and document everything with high precision.

Verify all preamps.

Verify equal electrical length and phase of all nine element coaxial cables.

Verify delay lines and direction selection in the combiner/phase unit.

Compare amplitude at the combiner for each selected three-element combination.

Evaluate front-to-back ratio, null depth and directional repeatability in the installed array.

Document any cable, connector, transformer or relay deviation before reinstalling the array.

Test equipment

DG8SAQ VNWA V2.

Calibrated Rohde & Schwarz RTC1002 digital oscilloscope.

Calibrated Rohde & Schwarz FSH8

Calibrated Fluke multimeter.

Bias-T used for simultaneous RF extraction and DC supply.

Identical coaxial cables and connections