![]() This is a factor of the way transmissions happen and the material used to receive them. ![]() The native impedance of most antennas is about 300 ohms. It’s only important to understand that it’s something you have to measure, and everything in your wiring has to work together or it gets really messed up. Really understanding impedance in a real-world way is a lot harder than you think. That’s a very simple explanation but it will suit for now. More precisely, it’s a measure of the total ability that a material is at stopping power from being sent through it. Impedance is a measurement of how effective a material (like a cable or antenna) is at sending power through it. What’s the difference between 75 ohm and 300 ohm anyway?įirst of all a word about impedance. And then I listen and try to figure out what they’re actually asking. Still, when someone says, “do you sell 75-ohm antennas,” it does make me shake my head a little bit. I had the help of some very patient people to get me to the point I’m at now. No one, myself included, was born knowing everything there is to know about antennas or anything else. I don’t blame people for asking questions. I don’t even blame them for asking dumb questions. But it wasn’t because of the wire it used. I was able to help them out and it turned out that old antenna on the roof wasn’t worth saving. ![]() At some point they had picked up the idea that the flat wire has an impedance of 300 ohms and that coax cable has an impedance of 75 ohms. They meant, would the antenna on their roof, which still used that flat wire, be enough for them. It took me a little while to suss out what they really meant. So they asked me, “Do I need a 75 ohm antenna or a 300 ohm antenna?” They know that I test a lot of antennas, and that I’m sort of a local expert on this stuff. Ma| Podcast #520: What happened to HD Radio?Ī couple of weeks ago, a neighbor asked me a weird question.Ma| Should you be using a VPN all the time?.Ma| Can you move your DIRECTV power inserter anywhere in the house?.Ma| Spring is here! Time to check those connections.Ma| HANDS-ON REVIEW: Televes Evoca Antenna.Ma| BREAKING: DIRECTV and Newsmax reach agreement.Ma| What’s the best way to measure antenna performance?.Ma| How can you get great internet on your boat while you’re in the marina?.Ma| EDITORIAL: Maybe this app thing is a little out of control.Ma| THROWBACK THURSDAY: Online Pizza Delivery.Ma| What’s the most futureproof DIRECTV LNB?.Ma| Does a cell booster work with all carriers? Even the little ones?.Ma| You need this smart moisture sensor.Ma| What would it take to get DIRECTV Satellite down to just one location?.Ma| FUN FRIDAY: Model T Ford and a tank full of gas….Ma| STREAMING SATURDAY: Taking aim at STARZ… is it just me?.Ma| Viasat to Provide In-Flight Connectivity to Additional Delta Aircraft, Including Widebodies.Ma| Can you use RG59 cable for satellite TV?.
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