[Boatanchors] Wierd Line Noise Observation on 40 Last Night

[Paul Manuel]

> On 8/24/05, Freeberg, Scott (STP) <Scott.Freeberg at guidant.com> wrote:
> > I went down to the shack early last evening and turned on the Johnson
> Ranger 1, Viking Courier, 75A-4.  It was already tuned up to 40 cw from
> the weekend so I didn't re-tune.  The setup runs about 350 to 400 watts
> output.  I listened around the band, found someone calling CQ, then for
> the first time, briefly keyed the rig to make sure the SWR was OK (as I
> use a Viking KW Matchbox), and was then greeted by 20/S9 line noise.  I
> turned on the KWM-2A and could hear it on there as well.  I then shut
> off the Ranger/Courier/75-A-4 to see if the noise might be coming from
> them, but the noise was still there.  This same thing happened last
> weekend too.  40 was nice and quiet, I tune up, bam, line noise.

Are you using the same antenna and feedline for transmit and receive? If
so, possibly your transmitter power is re-forming (for lack of a better
word) a poor cable or connection. It could be burning through dirt or
corrosion in the tuner, T/R relay, etc. I have seen this kind of thing
happen many times in antenna systems, so it is worth thinking about.

The bad news would be, of course, that the noise was there all along and
you were not hearing it because of the poor connection.
73,
Paul K4PDM


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