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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.

RC-CAM.com (main site and forum) will be closing down August 2021. This was announced several months ago (March 2021) to allow our members ample time to download any information that is important to them. After the site is shutdown the information will no longer be available here.

We appreciate every member's involvement with advancing the FPV hobby. It is indeed sad to say goodbye to all our online friends. Be safe and stay healthy.



How to open 3dBi 900MHz for SWR fine tuning ?


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It is weakly glued at the base and can be wiggled apart. However, the Hyperlink antenna is not just a piece of wire that would be easily trimmed. Once inside, you will find that it is a coaxial design that uses big diameter metal tubing for the dipole elements. Trimming or extending them will be interesting.

I would be very surprised if you found that the good antenna had different element lengths from the bad one. Are you sure there isn't something else going on that is causing the difference in performance? For example, maybe your Rx's SMA jack has a worn/damaged center pin and the two mates are not making good contact. Or some other goofy thing like that.

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It is weakly glued at the base and can be wiggled apart. However, the Hyperlink antenna is not just a piece of wire that would be easily trimmed. Once inside, you will find that it is a coaxial design that uses big diameter metal tubing for the dipole elements. Trimming or extending them will be interesting.

I would be very surprised if you found that the good antenna had different element lengths from the bad one. Are you sure there isn't something else going on that is causing the difference in performance? For example, maybe your Rx's SMA jack has a worn/damaged center pin and the two mates are not making good contact. Or some other goofy thing like that.

Hi Mr.RC-Cam,

Thanks for your feedback, it will be very helpful for me.

Best Regards,

Jacky65

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What test gear do you have ?

Terry

Hi Terry,

I have a receiver AOR AR-3000-A.

I just look the signal meter of the receiver to compare antennas.

I know it should be better to connect a SWR-meter but I don't have one.

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