Radio Frequency Interference (RFI) Is not an Adler Barbour
refrigeration problem as Larry indicates it is a boat refrigeration
industry problem. It seems that only a very few boaters are concerned
with RFI, the others are willing to set the VHF squelch high enough to
silence it out. A few system manufacturers have received complaints
from ham operators about RF from their refrigerators or other boat's
refrigerator's parked nearby. On the few boats that are experiencing a
problem the full box copper screen over the condensing unit does seem
to satisfy at least three radio operators that answered my resent
survey.



Larry W4CSC wrote in message ...
"David&Joan" wrote in
news:9i4Fc.6732$151.2942@fed1read02:

Skip:

Theoretical considerations aside, my advice would be to insulate your
box to the hilt and then install one of the many DC driven Danfoss
compressor systems with a direct evaporator coil, ie no holding plate.
Alder Barbour and others make them.

David



AAAAACCCCCKKKKKK!!!! ADLER BARBOUR!!

If you install an Adler-Barbour electronic 12V compressor, be SURE you put
it into an RF shielded screen room! We had one on "Claire's Navie" that
had this AWFUL pulsing RF noise ON VHF CHANNEL 16!....

Bzzt....Bzzt.....Bzzt,Bzzt,Bzzt.....Bzzt......Bzzt .......Bzzt, Bzzt,
Bzzt....repeating the exact sequence of SQUELCH OPENINGS on both VHF radios
for your entire watch!

Drove us crazy until I turned the damned thing OFF~! Only bothered Channel
16...of all the channels....JUST 16.

Larry

In article ,
(Richard Kollmann) wrote:

Radio Frequency Interference (RFI) Is not an Adler Barbour
refrigeration problem as Larry indicates it is a boat refrigeration
industry problem. It seems that only a very few boaters are concerned
with RFI, the others are willing to set the VHF squelch high enough to
silence it out. A few system manufacturers have received complaints
from ham operators about RF from their refrigerators or other boat's
refrigerator's parked nearby. On the few boats that are experiencing a
problem the full box copper screen over the condensing unit does seem
to satisfy at least three radio operators that answered my resent
survey

and why on earth, would one want to purchase an RFI Generator in
the first place just because the OEM's are to cheap to engineer
the refrigeration package right in the first place. For you
guys, that sell your junk to unsuspecting noncommercial boaters,
you can get away with that stuff, but just try and do that on a
Commercial Vessel (tug, pushboat, passenger boat, fish boat, or
ferry, ect) and you'll see the guy back in your shop after the
first trip, complaining about the NOISE it is causing in his radios,
and ready to rip the stuff out and toss it thru your front window.
These guys depend on a working radio with no noise. That radio
is their lifeline, when things go wrong, and when that happens,
they don't have time to go lookiing for the noise, and how to
turn it off. On an Inspected Vessel, they would tolerate that
kind of stuff onboard as they couldn't get a SOLAS Certificate
Issued, with RFI coming from onboard.


Bruce in alaska who HAS denied SOLAS Certificates due to
onboard RFI.......
--
add a 2 before @

Comment below....

On Sun, 04 Jul 2004 00:18:06 GMT, Bruce in Alaska wrote:

In article ,
(Richard Kollmann) wrote:

Radio Frequency Interference (RFI) Is not an Adler Barbour
refrigeration problem as Larry indicates it is a boat refrigeration
industry problem. It seems that only a very few boaters are concerned
with RFI, the others are willing to set the VHF squelch high enough to
silence it out. A few system manufacturers have received complaints
from ham operators about RF from their refrigerators or other boat's
refrigerator's parked nearby. On the few boats that are experiencing a
problem the full box copper screen over the condensing unit does seem
to satisfy at least three radio operators that answered my resent
survey

and why on earth, would one want to purchase an RFI Generator in
the first place just because the OEM's are to cheap to engineer
the refrigeration package right in the first place. For you
guys, that sell your junk to unsuspecting noncommercial boaters,
you can get away with that stuff, but just try and do that on a
Commercial Vessel (tug, pushboat, passenger boat, fish boat, or
ferry, ect) and you'll see the guy back in your shop after the
first trip, complaining about the NOISE it is causing in his radios,
and ready to rip the stuff out and toss it thru your front window.
These guys depend on a working radio with no noise. That radio
is their lifeline, when things go wrong, and when that happens,
they don't have time to go lookiing for the noise, and how to
turn it off. On an Inspected Vessel, they would tolerate that
kind of stuff onboard as they couldn't get a SOLAS Certificate
Issued, with RFI coming from onboard.


Bruce in alaska who HAS denied SOLAS Certificates due to
onboard RFI.......

I have to agree with Bruce. As one who has designed a number
of commercial and industrial electronic products, I'll be the first
to admit designing to minimum RFI is a pain...mostly the testing
to make sure it was done right...but the techniques are so well
known it isn't rocket science anymore. There's really no excuse for
electrical equipment to cause RFI, either conducted or radiated.
Norm B

engsol wrote in
:


I have to agree with Bruce. As one who has designed a number
of commercial and industrial electronic products, I'll be the first
to admit designing to minimum RFI is a pain...mostly the testing
to make sure it was done right...but the techniques are so well
known it isn't rocket science anymore. There's really no excuse for
electrical equipment to cause RFI, either conducted or radiated.
Norm B


The yachties have been conditioned to accept RFI tearing everything up.
After all, their whole damned unshielded NMEA network with the screw
terminals, bare wires, unshielded cables and connectors are RADIATING LIKE
HELL into everything with a receiver......dammit all.

Look at the wires hanging out of your electronics....all of
them....balanced, unbalanced, unshielded.....damned NMEA cheapskates.