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What I need to do is replace all the components that have been overheated or strained, and remove the burned areas from the board (because burning - or more accurately, carbonisation - makes these areas become partially electrically conductive instead of acting as an insulator). This photo shows the result of that process - the red colour on the burned area is special insulating varnish which is applied once the burned areas have been cleaned up and the components replaced. |
Vintage Vet
Repair and Restoration of Valve Audio and Radio