03-10-2012, 10:40 PM
Hello, yes, copper "mershon" caps were on the Philco 90 sets. Most of them have since been replaced by other varieties.
On the model 90 with a single 47 output tube, one mershon negative side is chassis ground, but the other one is not. There is a special gasket and copper base for this, with an insulated grommet that passes through the chassis for the negative side of the mershon. The ~1/4 inch hole between one of the electrolytics and the 27 tube is where this would go. If you intend to re-stuff the mershons, this is important.
If they are there for looks, then it is not an issue.
On the model 90 with a single 47 output tube, one mershon negative side is chassis ground, but the other one is not. There is a special gasket and copper base for this, with an insulated grommet that passes through the chassis for the negative side of the mershon. The ~1/4 inch hole between one of the electrolytics and the 27 tube is where this would go. If you intend to re-stuff the mershons, this is important.
If they are there for looks, then it is not an issue.
