Dan Padova posted:RSJB18 posted:There sure are a lot of taps on the winding Dan. I've never see so many on a small transformer either.
Yes- you have a combination of either constant output which can be varied through the rheostat or stepped voltage in three ranges.
I'd love to open it up and see what makes it tick but I have a feeling that if I do all of the wiring will turn to dust in my hands. Think how well you would move if you were in the same position for 80 years.
Add in the heat and its a sure recipe for disaster.
Here's a better view of the top.
Bob
Aren't the casings for these transformers spot welded closed ?
They are not welded and the top can be easily removed after unbending those four tabs that show in the photo. I have a Type T with the same kind of case in front of me right now. The solder connections for the line cord are easily accessible. The secondary wiring is fabric, not rubber, insulated and in good condition. The line cord needs replacement because the rubber insulation usually is deteriorated after 80-90 years. Several other such transformers that I've opened were about the same.
I've worked with 90-100 year old locomotives and seen the same wiring results. Fabric insulation is usually still good, rubber just flakes off.
Malcolm Laughlin
