Frequently Asked Questions

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Contact us at hugo@truerc.ca.

This is a tough question. We would like to give you accurate figures, but the real answer is: "It depends." Hugo wrote an article on RF link budget that gives excellent insight on the subject.

Even poor antennas are likely to get you farther than this. This is about the range you get with no antennas at all or on the wrong channel. Check antennas connection and/or channel selection.

It is normal. Our moxon antennas are a "tweaked" design that allows better performance at microwave frequencies. At DC they measure as a short-circuit, but operate normally at their design frequency. Our newest moxon (white panel) is not DC short anymore.

Although Hirose rates the U.FL at 30 cycles, we found by testing thousands of them that they last longer than that, especially the male side (VTX side). It is not something you should worry about if the U.FL "snaps in" well.

The X²-air uses two X-air paired together. The combined antennas have a wider horizontal beam and more gain. The compromise is a more narrow vertical beam.

Neither is better than the other. A RHCP antenna is described as RHCP "dominant" where most of the waves (97%+ in our case) are RHCP waves. Same for LHCP antennas. As long as both Tx and Rx antennas are either RHCP or LHCP, most of the signal passes from one to the other. If an odd RHCP-to-LHCP antenna combination is used, you are left with only 3% signal — you'll still have video, but not a pretty one.

It is false. A properly designed antenna is independent of its coax cable. You can change connector and/or reduce the cable if your skills are up to it.

On paper, it is 3% more range. However, a gain specification with 0.01 precision is hard to believe. Gain values change slightly with frequency and many other factors, so a manufacturer using such precise figures can hardly be taken seriously. It's like measuring cheese with a micrometer.

For omnidirectional passive antennas, there is only one way to increase the gain: flattening the radiation pattern. This means that when pushing the range limits you will lose signal every time you bank, climb, or dive the plane. We prefer to design omni antennas with the lowest possible gain and increase the gain on the receiver end. This way you can fly much more acrobatically without video glitches.