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Phone line as SW antenna [12-Jul-06]
Billy Burpelson wrote:
mc wrote: Either way I'd use a 600-volt (not 250-volt) capacitor in order to have a lot more "headroom" in case of lightning, etc. If you are going to couple to your radio directly versus using an insulated wire wrapped around your whip antenna ['gimmick' capacitor], then a 600 volt capacitor is a good idea. The -nominal- firing voltage of the telco protector on the side of your house or in your basement is around 600 volts -- which is to say, it passes along everything below 600 volts. Which is to say if you had a 250 volt capacitor, possibly bye-bye radio front end. If you are worried about the voltage rating of a series capacitor and how it protects your radio from transients, you may want to consider what kind of protection, if any, it actually gives. |
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