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H Johnson wrote in message . ..
If that does not work, and since Radio Shack stuff is normally readilly available, they sell a Ground LP Isolator (270-0054) that should do the trick or you can roll your own using their isolation transformer (273-1374) which is $4. The problem isn't ground-loop related; the problem is horrible with even battery-powered receivers plugged into the sound card. Interference goes from minor before I plug it in, to S9 hash all over the SW bands after I plug it in. I already tried isolation transformers. The capacitive coupling through the isolation transformer (measured to be about 100pF) lets way too much noise through... the net effect of the isolation transformer is a very minor improvement. Better grounding on the receiver side would probably help here, I'm going to drive a rod down just for the receiver soon. Perhaps a grounded receiver + an isolation transformer will do the trick. If that doesn't do it, it looks like fiber optics will be the solution. Tim. |
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