[rfeenstra]

Ditto to morzh. I have rewound a couple of PT and have found the # of turns the same but DC resistance substantially different. Wire length is substantially different. Am rewinding an Atwater Kent 165 PT right now. Resistance readings were sort of close but enough different to question it. Wow, that thing was cooked inside. Really makes me question the long term reliability of these old transformers with old insulation. Yet, i have not had transformers fail on sets I have rebuilt. Fingers crossed! Good reason to add fuses to these old sets.