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Attention: RC-CAM.com will be closing down August 2021.

The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

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How do I verify the freq of my TX to make perect GP Patch?

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Hi guys (and gals if there are),

I'm new to this but have a Trex600 flying with an HD cam and I'm about to go FPV when I mount the Tx.

I also just got my video glasses/goggles today :D

Ok, the question is how can I find out the exact frequency of my Tx found here:


I actually have a 1w Tx also but do not have a link for that. It's the same ranges though as it appears all these 900mHz units are.

The reason is that I want to be the most accurate with my dimensions for the GP Patch antena.


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The frequencies that are selected with the switch are very stable. Just use the mfg's published values.

So, what you are saying is that if I use the correct math in getting my ratio correct for the GP at say 910mHz, then it will be good?

I just didn't know if anyone actually tested these and found the frequency to be off... so then you make the GP Patch accordingly to match the adiusted frequency.


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