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Old 8th Oct 2011, 10:09 pm   #1
Ken
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Join Date: Oct 2003
Location: Near Glasgow, UK.
Posts: 309
Default Goblin time spot power supply

This radio has two large mica 0.01 microF mica caps wired in series across the primary of the mains transformer marked C12 and C13 on the attached part of the circuit diagram. For safety reasons I thought I would replace them. As this seems to put 0.005 microF across the mains I thought I should use X2 types. However, the connecting point between the caps is connected to earth and so one is connected L to E and the other N to E and I then wondered if I should be using Y2 types. I suspect the correct type to use here is the X2 type but I would just like to confirm this. I am also wondering how critical the values are here. I do not have any 0.01 but I do have 0.033. Will 0.033 do here? The voltage ratings seem a bit confusing as they are marked 250V AC on one side and 275V AC on the other. They are made by "RIFA". I seem to remember reading that this type of cap can fail in a spectacular way. Has anybody had a bad experience with this make?

Regards,

Ken.
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