"I was wondering if you can answer a question: Does a CHERRY oil capacitor have a positive and negative pole?"
The old Cherry capacitors (oil or paper) are of the tubular type with the aluminum armor wrapped around in the middle a sheet of plain paper or paper soaked in oil (oil). In these types it is customary to place a mark (black ring) to indicate the internal armor, important when they are used in audio. In this way, if we connect it to the earth, it works as a shield for the internal, avoiding the capture of snoring in the audio circuits. You can use the metallized polyester tubulars in place that are equivalent.
