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I was having trbl with whine in my am/fm thru the speakers
but it was fine thru the headset.....I thought hmmm ground
problem in the radio maybe?.
Well Yesterday I had the stator connector changed out due to
alittle cooriosion (sp) and slight melting of part of the
plastic. I want to keep it stock so I didn't want to go
the remove and solder routine. Anyway guess what? The whine
is gone, and is still gone even today, so I have to conclude
that there was somegrounding or what ever thru that connector.:)
 

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agoguen wrote:
I was having trbl with whine in my am/fm thru the speakers
but it was fine thru the headset.....I thought hmmm ground
problem in the radio maybe?.
Well Yesterday I had the stator connector changed out due to
alittle cooriosion (sp) and slight melting of part of the
plastic. I want to keep it stock so I didn't want to go
the remove and solder routine. Anyway guess what? The whine
is gone, and is still gone even today, so I have to conclude
that there was somegrounding or what ever thru that connector.:)
Most likely the corrosion in the connector distorted the AC from the stator enough to generate some odd frequency components which got through the rectifier/regulator. Corrosion will increase the resistance of the connector and can also act a rectifer, as was discovered by GIs in WWI who used rusty razor blades as a crystal detector in their foxhole radios. A resistor and diode can distort a waveshape which when mixed with the frequencies already present in the stator output can easily creat audio range AF noise.
 

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agoguen wrote:
I was having trbl with whine in my am/fm thru the speakers
but it was fine thru the headset.....I thought hmmm ground
problem in the radio maybe?.
Well Yesterday I had the stator connector changed out due to
alittle cooriosion (sp) and slight melting of part of the
plastic. I want to keep it stock so I didn't want to go
the remove and solder routine. Anyway guess what? The whine
is gone, and is still gone even today, so I have to conclude
that there was somegrounding or what ever thru that connector.:)

It might have been stray RF signals from the stator on the the base 12 volt system but could also have been improperly routed wires along the antenna wire running to the rear that were moved when the connector was replaced. I had an electrical whine in my Wing's radio (all except head phones) that was cured by re-routing the antenna pig tail running along the L/H side of the seat and regulator area.

Twisty
 

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twisty wrote:
It might have been stray RF signals from the stator on the the base 12 volt system but could also have been improperly routed wires along the antenna wire running to the rear that were moved when the connector was replaced. I had an electrical whine in my Wing's radio (all except head phones) that was cured by re-routing the antenna pig tail running along the L/H side of the seat and regulator area.

Twisty
Agreed another common problem when mixingsignal wires with power leads.
 

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The only sure way to make your charging arrangement reliable and interference freeis to cut that connector out and solder the wires, even if the connector looks ok the pins and receivers wear causing arcing inside the plugs leading to unexpected failure.

It's good that you want to keep your bike 'stock' but you'll find 95% of 1200's will have had the connectors soldered and some have the Dave Cambell's special harness, see http://gl1200harness.tripod.com/,to get rid of all the inherent electrical problems
 

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Soldering is the best long-term solution. You won't need to undo the wires unless for some reason you need to pull the engine.
 
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