Class D Amps - FM reception

Interestingly, no one except Vic said anything about the antennae they're using. And he has a directional yagi that's well away from his locally generated rfi. So if you're using a dipole FM antenna in the same room as your digital gear, what do you expect?

That said, a lot of rfi can be dumped into your power lines by the PC on the digital equipment -- shielded PCs help keep it from broadcasting into the air but not from contaminating the house wiring itself. Using a conditioner or regenerator with digitally filtered outlets can keep this from becoming a problem -- and eliminates the necessity of plugging the digital gear into a separate circuit.
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I use shielded power cords and an Exactpower EP-15A. The antennas I have used are a Magnum Dynalab ST-2 and a large Godar. I remember trying each in the same room as the system. In the case of the ST-2, the eAR amp was in use and the H20 with the Godar.

There was no noise problem. The reception is better with the antenna in the attic through.

I am doubtful of of typical filters curing a noise problem of sufficient magnitude. I wonder where the FCC stands on components generating noise...

Bob

I had FM interference with the Nuforce 8s and was able to totally eliminate it by using a coax cable hooked up to the FM tuner for reception.

Thanks, all. Sounds like a headache I can avoid with a traditional SS amp. Perhaps next generation of Class D amps will solve this problem.

Neal

The Nuforce is the only brand I recall as having the reported noise problem as well as turn on noise and the no-load vulnerability. These strike me as implementation issues and not reflective of class D amps in general.

It may be that only the Nuforce models have FM noise problems to solve.