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frank.hinde(at)hp.com
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 Posted: Mon Mar 20, 2006 9:58 am Post subject: RF |
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Speaking of RF...I have had a long standing noise in my radio
problem...Ok unitl the alternator starts charging then you get
everything, ignition, alternator, strobes...Lovely....And its not on the
intercom as it varies with radio volume.
A complete aside...While working in my shop I noticed National public
broadcasting got noisy the moment I plugged in my battery drill battery
to its smart charger...Hmmm I wonder?
In the plane I have a battery charger on the GPS powered from ship....So
yesterday while out flying I unplugged it.
Noise went away immediately and I can turn the noise on and off by
plugging and plugging the power lead...Ah HA!
Did I simply not ground the charger properly?
Frank
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nuckollsr(at)cox.net
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| Posted: Wed Mar 29, 2006 6:40 am Post subject: RF |
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At 09:55 AM 3/20/2006 -0800, you wrote:
| Quote: |
<frank.hinde(at)hp.com>
Speaking of RF...I have had a long standing noise in my radio
problem...Ok unitl the alternator starts charging then you get
everything, ignition, alternator, strobes...Lovely....And its not on the
intercom as it varies with radio volume.
A complete aside...While working in my shop I noticed National public
broadcasting got noisy the moment I plugged in my battery drill battery
to its smart charger...Hmmm I wonder?
In the plane I have a battery charger on the GPS powered from ship....So
yesterday while out flying I unplugged it.
Noise went away immediately and I can turn the noise on and off by
plugging and plugging the power lead...Ah HA!
Did I simply not ground the charger properly?
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Not necessarily. I have several cigar lighter chargers
for maintaining cell phones in the car. One particular
model is a prodigious producer of noise in the AM broadcast
band. The types and numbers of switchmode power supplies in
the wild on consumer products have made the FCC's noble rules
for management of inter-system interference a fond wish with
zero chance for meaningful enforcement.
This phenomenon is going to grow.
Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >
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