SublimitySam 0 Posted March 12, 2012 I purchased some cheap no-name baluns through Amazon and THEN I read the discussions about some cheap baluns being only pass-through w/o the required circuitry. So what do I do? Well take one apart and find out what's inside! Here's the balun: and the other side: And what did I find inside?? Is this what I might find inside a brand name balun? ~Jim Share this post Link to post Share on other sites
Soundy 1 Posted March 12, 2012 Looks about right... Share this post Link to post Share on other sites
SublimitySam 0 Posted March 12, 2012 Thanks, Soundy. I've done just enough research on baluns to be dangerous (Wikipedia, etc.), and know there are different types. Just wanted to be sure. Share this post Link to post Share on other sites
Numb-nuts 1 Posted March 12, 2012 If you have loads of money, why not buy a range of baluns and rip em apart for us all to see? Share this post Link to post Share on other sites
SublimitySam 0 Posted March 12, 2012 If you have loads of money, why not buy a range of baluns and rip em apart for us all to see? Don't have loads! I said these were cheap, US $15.90 f0r 6 pair. My goal was to gently remove the "cover" to see what I've got. I succeeded in that. As you can see the balun literally came apart at the seam. Super glue will render this balun transmission worthy again. It's going back into service... " title="Applause" /> ~Jim Share this post Link to post Share on other sites
survtech 0 Posted March 12, 2012 Ignoring cheap crap, there are two distinct designs for video baluns - isoolated and non-isolated. Both use transformers. Isolated - no direct connection between input and output Non-isolated - autotransformer type. Isolated video baluns are rare but have certain advantages, especially immunity from ground loops. Very hard to find... Share this post Link to post Share on other sites
Birdman Adam 0 Posted March 13, 2012 Where did you buy those? I think I bought the same 6-pair-pack on Amazon for cheap. They work great! Share this post Link to post Share on other sites
SublimitySam 0 Posted March 13, 2012 Where did you buy those? I think I bought the same 6-pair-pack on Amazon for cheap. They work great! Yep, that's where I got 'em. Glad to know they work great. Thanks! I'm thinking I should put heat shrink around them after they're attached.. Did you? Share this post Link to post Share on other sites
the toss 0 Posted March 13, 2012 Basically baluns are just impedance matching transformers. The better quality ones will also have a bit of filtering to block low frequencies. So you may see a few small caps & inductors in the better quality ones. Share this post Link to post Share on other sites
Numb-nuts 1 Posted March 14, 2012 I mix baluns all the time and have never had a problem. What I mean is I us pigtail baluns at the camera end and boxed 4 & 8 way baluns at the DVR, I gave up bothering to match brands as it made no real difference. Of course I always test them before installation just to be sure but it's never not worked well. If it works well, why question it, is my motto. I only try to analyze when things don't work, then I wan't to now why not. Share this post Link to post Share on other sites
ED209 0 Posted October 23, 2013 Hi folks Not sure if dredging up an old post is frowned upon...if it is then I'm sure a mod will give me a good ticking off. Anyway, I'm wondering if anyone has any comments on the quality of baluns that I have recently purchased. I have examined pictures uploaded by the OP, mine don;t seem too much different. Any advice from anyone? Share this post Link to post Share on other sites
Kawboy12R 0 Posted October 24, 2013 It's all good... Share this post Link to post Share on other sites
Numb-nuts 1 Posted October 28, 2013 I have had the odd few that had problems but I resolver to destroy those immediately so they don't get mixed in with the good ones. I buy them in big batches and the only time they are an issue is when I have had to use active baluns with them, but not always an issue. Good to remember they are NOT water resistant and take the necessary precautions to protect them from water/moisture. I always squeeze a little Contralube into the terminals and into the plug, and onto the DC or 24VAC connectors I never find that white dusty corrosion, in my junction boxes. Doesn't cost much and lasts ages, a little goes a LONG way. Share this post Link to post Share on other sites
pal251 0 Posted November 7, 2013 I have some from Ebay that I purchased that have a similar label. I would be willing to sacrifice one in a day or two when I get time for the cause of people to look at them If anyone is interested let me know Share this post Link to post Share on other sites
wozzzzza 0 Posted November 20, 2013 ive bought heaps of power/audio/video baluns from china for like $5/pair and have been great, went down to the local CCTV shop and he said he could sell some to me cheap if I bought a camera, I asked how much is cheap, he said $29 a pair, they are normally $59/pair he said. same thing with camera, $300 camera I can get for $80 from china. only thing different is the name of it, a generic camera rebranded. another one, a GPS unit http://www.ozspy.com.au/gps-tracking/mini-gps-tracker-with-audio I got mine direct from the real manufacturer in china for $90 delivered, they want $270. Share this post Link to post Share on other sites
cctvboss 0 Posted April 24, 2015 Sorry for burining the steak but this one: Talvico LLT-202C will give you a lot of troubles (interferences). Each single piece behaves the same (vertical bars on the screen). The one shown in the first post is superrior and cheaper . Share this post Link to post Share on other sites
Numb-nuts 1 Posted April 25, 2015 Sorry for burining the steak but this one: Talvico LLT-202C will give you a lot of troubles (interferences). Each single piece behaves the same (vertical bars on the screen). The one shown in the first post is superrior and cheaper . I won't be able to look a balun in the face now knowing I've seen them in their underwear.... Share this post Link to post Share on other sites
