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Michael Coslo wrote:
Slightly OT, but kinda fun anyhow..... I'd been trying to locate a reasonably priced USB cable over the weekend It seems that you often pay as much for the cable as you fo for the device you are connecting to the computer. Has stereo voodoo physics entered the computer realm? Anyhow, I ended up in a Radio Shack store, found the cheapest cable I could, (20 bucks) and made the mistake of mentioning something to the salesman about the funny claims on the packages. Big mistake, I had blasphemed his religion. In the next couple minutes I learned that: Turns out that different frequencies travel at different speeds down the cable. Good cables have special formulations of wire that compensate for this. Everybody knows that! He didn't know what velocity factor was, but let me know that he had taken physics classes, so he knew what he was talking about. So why have u antenna gurus been misleading us?! Now that my eyes have been opened I understand.... Looking at an antenna, it becomes obvious that the lower the frequency, the slower the signal moves. The extra length of the antenna allows the RF to accellerate enough so that when it reached the end of the antenna, it has enough velocity to shoot out and not float straight up. Those really high frequencies are zipping by so fast that they hardly need any wire to get to TOSP (Take-off speed) Wow, I have reached true enlightenment............... Funny that you brought this up today, Mike. I happened to hit my local RadShack yesterday in search of a Cinch-Jones power connector. I told the salesman what I was looking for, an 8-pin Jones plug/socket set. He asked if I was looking for a microphone connector. I explained what the Jones plugs looked like and told him that they used to be standard fare in at Radio Shack and that they stocked them in 2, 4 and 8 pin varieties. He told me that he'd never seen nor heard of them. I told him that I could likely use a strip of the European-style nylon electrical connectors with screw terminals. He'd never heard of those and said RadShack didn't stock them. I walked to a different section of the store and pulled two of them off the rack. I've gotten into several heated discussions with audio weenies over oxygen-free cable, gold-plated connectors, carbon vs. metal film resistors and mylar vs. paper capacitors. All of these guys swore up and down that they could hear a difference in one item vs. the other. I've offered to set up blind tests to see if they could, but none would ever take me up on the offer. Dave K8MN |
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