A pal of mine (harp player) has a Alamo amp with no PT (35W4, 50C5, 12AU6), now in the US a 1:1 isolation transformer would be recommended. As he is using a 240VAC-120VAC transformer, doesn't this effectively do the same job in isolating him from the mains?
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I am with Albert here, MANY step down transformers are auto-transformers - single winding with tap - and provide ZERO isolation.
If a 230/115transformer is in fact a primary and secondary type transformer with no connectiion between the two, then yes it provides isolation.Education is what you're left with after you have forgotten what you have learned.
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