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Mag Engine Dynamo

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Mag Engine Dynamo
Alan Offline
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Joined: Aug 2017 Posts: 1,337 Threads: 34
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Location: Cheshire
Car type: Race Ulster, 1926 Special, 1927 Chummy, 1930 Box
#1
01-08-2022, 10:58 AM
This morning I’ve noticed that the cut out points aren’t opening when the engine is switched off. They stay closed until the master switch is off.  Can an electrical expert point me in the right direction? Please.
Alan Fairless
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Alan Offline
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Joined: Aug 2017 Posts: 1,337 Threads: 34
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Location: Cheshire
Car type: Race Ulster, 1926 Special, 1927 Chummy, 1930 Box
#2
01-08-2022, 03:46 PM
Another question - I’m fairly sure this will turn out to be a problem with earthing. Am I right in thinking the secondary coil leads to earth? If so between which points should I check the resistance, and what should it be roughly?
Alan Fairless
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Dave Mann Offline
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#3
01-08-2022, 09:24 PM

.jpg   Generator_type_2.jpg (Size: 24.99 KB / Downloads: 77) The voltage coil, the fine wire one, which closes the cut out resistance can be measured between D and earth I've no idea what it should be.
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