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rvella

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  1. I have an odd problem with fuzz in my camera image. It ONLY happens at night. It looks crystal clear in the day. I've replaced the camera with an identical camera and swapped lenses a few times. My last solution is to change the camera out to a different brand/model/etc, but I want to know if there's another instant solution. Any suggestions appreciated. Thanks!
  2. I'm bidding a job with underground conduit. The conduit has a greyish material sealing the pipe. I've been told this is common with gas stations because of fumes leaking back into the building. Question is: How do I remove it? I want to then, of course, reseal the conduit with a similar material. Anyone had experience with this sort of thing before? Another contractor bidding the job mentioned a solvent that will dissolve the material. Any help is appreciated and rewarded with large amounts of thank yous. - Rob
  3. What technique does everyone use for mounting into each of the following mediums? I've never mounted a PTZ camera and imagine they require a bit more support. I'll likely be mounting mine on a metal building. Also, what do you do to usually finish the work (Seal the holes with foam, etc..)? - Metal (Sheet metal building?) - Stucko - Wood Any help is appreciated, thanks. R
  4. It happens on every camera, which of course leads me to believe it's the power supply. I'm going to bring in a DC power supply and isolate the AC from the DC. The power supply in the DVR is internal.
  5. They're a mixture of 12V and 24V cameras. It's a dual voltage power supply. My extent of knowledge on ground loops is limited, but I've always tried to keep the DVR and the power box on the same circuit if that helps. I've heard of ground loop "blocks" that are meant for multiple cameras. Any suggestions on a particular product? I may just end up replacing the power supply all together. Suggestions?
  6. I installed a new system for a client about 10 months ago. We used a mixture of new cameras and existing cameras. The DVR, power supply, and most of the old equipment was replaced. Problems started to occur recently. The DVR will show "video loss" on random channels and have frozen images, but this is a separate but possibly related issue. I'm having lines and random jitters in the image that seem to be power issues. But I don't have a confirmation. I thought about first putting a UPS on the power source and the DVR to see if bad power would be filtered, and if that didn't help, replace the power supply instead. But I want a second opinion. I've recorded about 30 seconds of footage from the site in order for other people to see. http://aegisbak.com/f/index.php If anyone has a solution or thoughts I would greatly appreciate it.
  7. I installed a new system for a client about 10 months ago. We used a mixture of new cameras and existing cameras. The DVR, power supply, and most of the old equipment was replaced. Problems started to occur recently. The DVR will show "video loss" on random channels and have frozen images, but this is a separate but possibly related issue. I'm having lines and random jitters in the image that seem to be power issues. But I don't have a confirmation. I thought about first putting a UPS on the power source and the DVR to see if bad power would be filtered, and if that didn't help, replace the power supply instead. But I want a second opinion. I've recorded about 30 seconds of footage from the site in order for other people to see. http://aegisbak.com/f/index.php If anyone has a solution or thoughts I would greatly appreciate it.
  8. rvella

    Is more IR LED's always better?

    I've hardly ever seen IR done right. From my experience IR cameras are a way to compensate for low quality CCDs, as well as for creating a "general" camera that can be boxed into DIY kits. I've seen some successful IR implementations, but I would have to agree that good ole' fashioned white light does a better job when done correctly.
  9. rvella

    Cabling Outdoor

    I use weatherproof 1 gang boxes on the surface with a gray faceplate, and flexible gray tubing to the camera. The connector that hooks into the camera is usually a liquitite connector, which can be purchased at Lowe's. A kit can also be purchased that has the tube and the connectors. If you do it often, I'd recommend an electrical supply store. i also usually use some sealant (silicone caulking) on the hole where the wire goes into the wall.
  10. Yeah, agreed on the pricing there. I buy Siamese for around 10-11c a foot (95% grade w/ 18 awg power). I also buy BNC twist on ends for around 30c each.
  11. rvella

    Cabling Estimates

    Most every wire I've purchased has footage markers, except the one I mentioned, of course.
  12. rvella

    Cabling Estimates

    I pay around $90 for 1000ft of 80% Siamese wire, white or black. Shipping is usually around $15 a spool. The only thing I don't like about the wire I buy is that it doesn't have footage labeled on it -- I'm forced to use a scale and a bit of algebra to estimate how many feet I use, but its pretty accurate. I'd prefer a box, but due to the low cost I'm willing to use a cart I purchased. It is a basic shop cart that I've drilled some holes through to put some 3/4" EMT. I pull the EMT out and place my cables on the pole, thus creating a pulling platform. It stays sturdy most of the time, but it falls over from time to time; I'm slowly learning. I generally quote out 100' per camera in normal offices where drop ceilings are in play. When I know I'm dealing with a larger building, I'll 1.5 my estimates on wire, but more often than not my actual feet end up being half of my estimate. I charge between .50 and 1.00 a foot on Siamese, so the extra padding helps with unexpected costs, such as additional wiremold, parts, etc.
  13. rvella

    CCTV camera 12V DC or 24V AC?

    When dealing with DC, voltage will dissipate much quicker. It's called Ohm's law -- basically the more distance involved, the more resistance, thus more energy loss. There are several Ohm's law calculators out there online that will tell you how many volts you need to push into a wire given a certain distance. The only one I can reference is this power over ethernet one: http://www.gweep.net/~sfoskett/tech/poecalc.html That will give you an estimate for 22 guage wire at minimum.
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