[Fwd: Re: [Kenwood] Good rigs for power line noise]

2003年3月24日 12:43:30 -0600

Hi John:
At my old QTH, I had enormous problems with 60 cycle noise on HF and at
the time, I was interested in 40 and 20 meters. It is my understanding
that typical noise blanking circuitry is most effective against random
high peak-value noise like automobile ignition noise. I never really
experienced any benefit from the rig's built in NB circuits in my
particular situation. Although it could be that I am using relatively
old
rigs: TS-430, TS-690 and TS-50.
Maybe you could try a different approach - perhaps in front of the
receiver... I did have some success with shielded loop antennas,
although
I found that transmitting through them was a different story!
Best of Luck & 73,
Steve Kent
KW5CQ
Houston, Texas
John Geiger wrote:
> I have been chasing the ST0RY dxpedition for the last
> couple of days, with frustration. The best band for
> propagation to ST seems to be 30 meters, but I have a
> high noise level on that band, so they are very rough
> copy. I think it is power line noise, and have been
> contacting the power company, but they have been no
> help so far. I am also in touch with the ARRL to try
> and get their help. Of course there is always the
> possibility that the noise is coming from elsewhere.
> It seems to be a constant S6 on 30, and about the same
> on 40. 80 is usually a little quieter.
>> I also have this noise on the higher bands, but bought
> a Yaesu FT100D based on the reputation of its NB. It
> does take out the noise on 20-6 meters, lowering it
> from S5 to nothing most of the time. However, it
> doesn't seem to touch the noise much on the lower
> bands. I used to have an Icom 746 (original model)
> and it didn't do anything against the noise. I also
> used to have a Kenwood TS2000, and I seem to remember
> that it handled it pretty well on all bands. Guess
> the IF DSP or Kenwood NB was worth it.
>> Does anyone have a suggestion as to what rigs really
> handle this type of noise well, other than the TS2000.
> My budget is a little tight right now, so cannot
> afford an Icom 756PRO or 775, although someday hope to
> have one of those. Looking for any rigs that are a
> little less expensive that knock out power line or
> other noise really well. Any suggestions?
>> This ST0 deal so far has me considering giving up
> DXing and sticking with satellites or 2 meter FM (not
> really but it feels like that at times).
>> 73s John NE0P
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