Bicycle Man: My EE friend says that anything that acts like an antenna (even a power cable that is plugged into a component but unplugged from the wall) can pick up rf.
Shorting plugs....
Do these really work well? And if they do does one need to worry about unused Balanced inputs?
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O.k. Power cords can pick up rf, depending on the length of the cable and wavelength of the rf. In others words, yes, I agree. That is why cables are generally shielded. That is also why ferrite rings are put around cables (as I described earlier in this thread). On power cords, here is a nice link. It pertains to accessories, marketing tactics, and specialty power cords. It is a fun read; judge for yourself... http://www.nvnews.net/vbulletin/archive/index.php/t-106050.html |
That's not turning it off if it's a unit with a switching power supply (i.e., most consumer electronics these days); the only way to turn off such units is at the wall or unplugging them. In any case, what was the configuration you used to test on since your current system can't accept more than one input? In addition, how close were the electronics to the system? |
The Fisher 400c pre-amp shorts the input rca's that are not in use. Cool! This, from a 1950's design. I learned this from the schematic of the pre-amp. I cannot say that this was progressive; I just don't know, but that is my thought. However, I can say that this was prudent design. It eliminates spurious noise from entering the active input signal path through cross-talk. And, that is the point of shorting your unused input rca jacks. |
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