07-16-2010, 07:26 PM
It's tedious but can certainly be done. For starters, remove the laminations and then remove the cardboard layer right next to the core. This should expose the starting end of the primary. Unwind a layer or two and watch for a break, If you find it, bring out the wire and make a new cardboard tube to fill the space (manila folders glued with Elmers work well. Use the old core as a template to form the cardboard).
If the break is elsewhere, or the entire winding disintegrates, you could wind an entirely new primary but the secondary is probably in no better shape.
Re-using the old wire is usually more work than it's worth, and a bad idea if the wire is prone to breakage.
If this were a 1920s transformer, the primary is typically 4000 turns of #40.
If the break is elsewhere, or the entire winding disintegrates, you could wind an entirely new primary but the secondary is probably in no better shape.
Re-using the old wire is usually more work than it's worth, and a bad idea if the wire is prone to breakage.
If this were a 1920s transformer, the primary is typically 4000 turns of #40.
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