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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 is being announced now (March 2021) so that everyone has 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.



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Friends,

I need some help fine tuning my 900 MHZ FPV system. I purchased a 900 MHZ 500 Mw system from Range video about 1.5 years ago. I have used it infrequently primarily because I get such lousy performance from it.

I have some experience in RF so I know a few of the basics.

Problem: Whenever the TX exceeds ~75' from the RX, the signal quality drops dramatically. I see the "noise" lines across the screen, or the video picture drops completely. I have experimented with the following possible solutions:

1) I initially had the TX+cam mounted on a Trex 600. The camera itself was mounted underneath on a separate camera frame and the TX was near the rear the the helicopter. I was careful to route all of the video lines away from other power or RFI/EMI power sources. The Tx uses its own separate power source. The cable from the camera to the TX goes thru a toroid ring (10 wraps) and is close to the TX. Result = Still having signal drop issues.

2) As you can see from the photos, I have utilized four different omni style antennas on the TX. Each style TX was used at both vertical and horizontal orientation. The largest omni is a 5 dbi I purchased from L-Com. I used the second large omni on the RX, also in different orientations. I have even tried different combination's of both large and small omni's pictured on the TX and RX. Still having signal drop issues.

3) I then purchased a large panel/patch antenna rated at 12 dbi to be used on the RX. Again using different omni antennas at different orientations on the TX, I was getting only marginally better signal quality, but still having poor performance overall.

4) I then repeated the above listed trials using a large foamy airplane (Multiplex Mentor). I mounted the camera, battery, TX & omni under the tail, on a flat aluminum plate (see photo)far back away from the nose containing the electronics. Still having performance issues.

I do not have a recorded video....yet.

So, here's my theories:

1) Range video product is junk, or I got a dud, or both.

2) I need a more powerful tx, like this model:

http://www.nghobbies...products_id=292

3) I need a different model TX, like this model:

http://hobbywireless...&products_id=71

or this one:

http://www.dpcav.com...page=1&featured

Any and all suggestions are welcomed

TIA to all in advance

Any suggestions would be helpful.

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