In article ,
Earl Haase wrote:

Bruce,
In the past you have posted here about all your experience in
electronics repair. I am confident that you knew what I was asking.
After all, I just asked a couple of questions in order to get the
opinion of others who would hopefully share their collective knowledge.
I don't know why this ****ed you off so much but if you don't want to
play nice please feel free not to play at all.

Earl



I am not '****ed Off" at all, I just want a clarifacation on what you
are trying to do. We get all kinds, asking for advice, and most can't
detail what they really want, let alone ask intelligent questions, about
subjects they are just learning about.

Now, first off, you NEVER eliminate noise at the receiver, but ALWAYS
eliminate it at the SOURCE. Filtering the power leads of marine
equipment, is only effective, IF that is where the noise is being
radiated FROM. ie Get a GOOD filter on your Alternator Output,
to keep it from using the DC Power System as a Radiating Antenna,
to the rest of the boat and all the folks in the same harbour.
Put a Cap ACROSS all the Brushed DC Motors, onboard wheather they are
noisy now or not, and do it as close to the motor as possible, and NOT
from each lead to the motor case. Most GOOD marine electronics has a
"Ground Lug" on the case. Use them, to connect each case to a common
LOW IMPEDANCE Grounding Point for electronics. If you have a "Plastic
Boat", build a common LOW IMPEDANCE Grounding Point for electronics,
before you do anything else. For SSB Radios, move the Antenna Tuner
as close to the RF Ground as possible, and keep it as far from the rest
of the electronics as practicable. Radars need to have their cases
connected to the common LOW IMPEDANCE Grounding Point, and make VERY
sure that you keep the Grounding Shield of the Interconnection Cable
between the display and antenna good and tight on BOTH ends. Put Caps
ACROSS the drive motor of your AutoPilot, and the Switching Relay
Contacts if your pilot has them. If you have multiple VHF Radio's,
make sure that the antennas are seperated by 3 or 4 wavelengths, both
vertically and horozontally, so as to eliminate direct coupling between
the radio's. If you have multiple MF/HF Radio's, design and build a
complete PTT/Antenna Break Interswitch system between the radios. If you
support multiple RADARS on the same Band, seperate them vertically, so
as to keep their 25 degree vertical beamwidth antennas from seeing each
other. Mount Inmarsat Antennas way from GPS Antennas, as they use the
same bands.


Bruce in alaska who gives away $1000US advice, for free, to
those who ask
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add a 2 before @