[R-390] Power Line Filter

[Barry Williams]

On 10/22/10 1:01 PM, Les Locklear wrote:
> I have a Corcom line filter in my John R. Leary modified SP-600. I can say that out of all the receivers in the shack, it is the quietest. My noise level in very low where I live even though I live in the central part of town. Power line noise in non-existent. But, when listening to real tough dx, the Leary SP-600 hears it before the others and the audio is much clearer than others. So much for bells, whistles and modern engineering marvels. All other things being equal, it has to be the Corcom line filter. Oh, it has a marvelous product detector too, so listening on ecss isn't even an issue either. It certainly drifts much less than a Drake R7A I owned a few years back and is on par with a good R-390A as far as drift goes, + or - 200 hz from turn on to half hour. I regularly listen to ssb nets and enjoy the audio much better than the other lsited receivers. One item, I do use a Timewave DSP-599zx when the standard LC filters don't cut the mustard.
>
The Timewave is amazing when you have to dig.