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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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About DCSensui

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    RC-Cam Visitor
  1. Here's something that converts analog to Firewire: http://www.bhphotovideo.com/bnh/controller/home?O=WishList.jsp&A=details&Q=&sku=312315&is=REG Grass Valley ADVC-55 Analog to Digital Media Converter Price is about $150.
  2. Maybe have a few "barf bags" available, just in case? :-)
  3. Makes sense to do that. With full-scale aircraft, the antenna for the radar transponder is placed below the fuselage so the ground-based ATC receiver can "see" the transponder with less chance of the aircraft's structure blocking the signal.
  4. Yeah, I'm wondering if the counterpoise being that close to the tail fin might have an adverse effect. If it's a problem I'll have to make a Plexiglass version of a tail fin. At least the tail rotor blades are transparent to radio waves.
  5. So here's the actual "flying" version of the antenna. The elements consist of brass tubing with a diameter of 0.9". The length of the elements are 3.09", measured from where the conductor emerges from the ferrite bead. The brass elements are supported on a plastic base with tiny Plexiglass blocks. A quick range check -- almost line-of-sight -- got me 1/10 mile before the image started to break up a bit. I'm not sure how good the receiver antenna works since it's another crudely cobbled setup. Here are the basic parts. The mounting blocks are tiny Plexiglass strips that were dr
  6. Correction: I had it set at 3.12" Thanks again for your calculation.
  7. Thanks for the suggestions. This was the "stock" antenna that comes with the transmitter. And it was connected directly to the transmitter as seen in the photo, except that it was pointed downward instead of upward. I've read elsewhere that the stock anteanna can be pretty bad with a reported SWR of 3:1 or so. And pivoting the antenna 90 degrees can make it even worse. The thought behind the solution that I'm cobbling together is to get the antenna way back on the tail, away from the R/C receiver and away from the rotor blades.
  8. I got the length from an online calculator. Thanks for the corrected figure. Would both elements have to be trimmed? Or is the "ground" half of the element less critical? Regarding the metal fences, etc., I noticed something quite interesting. Doesn't take much to foul up a signal. I noticed that the receiver antenna could find tiny dead spots that were about four inches in diameter, and I could actually blank out the signal if I carefully placed the antenna in just the right spot, even though the polarization was correct. And if I used the metal body of my iPod Touch like a mirror, I could
  9. I finally got the ferrite beads and assembled a very crude dipole as a test. It's an RG-174 wire with a right-angle SMA connector. The ferrite bead sits right where the dipole starts. The center conductor is soldered to a short length of wire as is the shield. Both wires were trimmed so the length of each element is 3.2", measuring from point where the elements start at the ferrite bead. Everything was mounted to a piece of scrap plexiglas. Totally unflyable but it's just a "breadboard" version. I don't have any test equipment except a digital thermometer that I checked by immersi
  10. VHB isn't a garden-variety double-sided foam tape. This is an industrial product that's used in critical applications. So if it's applied to a properly cleaned surface, it'll stick extremely well. Among the applications include glass windows in high rises and certain aircraft components. I did a quick Google search. Apparently I saw a story about VHB on Modern Marvels: VHB is discussed at the 1:14 mark. Another video that compares VHB to conventional double-sided tape: A company like 3M wouldn't encourage its use in critical applications if it didn't work nearly perfectly: tha
  11. It reminds me of that martian character from the Bugs Bunny cartoons!
  12. I was using the "stock" Range Video antenna but read that it's not very efficient, and it gets worse when it's bent 90 degrees. I'm going to try a dipole that's in a better location and possibly more efficient. Here's how I had it set up. Unfortunately there's a lot of junk directly in the radiation pattern (tail boom, servo). It also works angled downward with the standard landing skids. Edit: by the way, the transmitter's attached with something called 3M VHB tape. 3M developed it to fasten windows and other high-stress, critical materials. I believe it was used to mount the glass on
  13. Thanks for the info, Terry. I hope to be able to get a few of the right type of ferrite beads. Apparently they're designed for specific frequency ranges. I'll give this a try and see how it goes. Dean.
  14. I'm new to this forum but have been lurking all over the place researching antenna information. Seems like each discussion forum has its specialties with great experts, and this is the one for transmitters and antennas. Thanks for sharing all the knowledge and experience! I'm considering making a dipole antenna for a 500 mw, 900 MHz Range Video transmitter, to be mounted on an Align TRex 450 helicopter. I wanted to place the antenna way back at the tail rotor, out of the way of the main rotor blade. An RG172 cable leads to the antenna. Attached is a crude diagram, not to scale. It sho
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