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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Noisy Creek OBH-8 posted by Steve on February 22, 2000 at 13:51:59:
Unfortunately, I live within less than three miles of three separate television transmitter towers here in Washington, DC. These are pumping megawatts of RF into the air, and everything in my house that is powered by a wall-wart powersupply is picking up the signal. This includes a keyboard and a telephone (which picks up the TV station audio quite clearly) as well as my OBH-8SE, which produces an objectionably audible hum in the right channel. So far, I have reduced the noise level by replacing the connecting cable between the preamp and the power supply with a shielded cable (altho grounding the shield does not seem to help). Ferrite rings have not proved effective. I'm still working. If I find something that really works, I'll post in the vinyl area. I'm going to try RF chokes and possibly mounting both the power supply and the preamp board inside one metal chassis.For now, the only thing I can suggest is experimenting with coiling or moving the power pigtail in a position that minimizes the RF pickup.
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- Re: Noisy Creek OBH-8 - Bruce from DC 09:52:30 02/23/00 (0)
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