[Radioroslyn]

Hope both of yous guy are right. I've got model 600 with an intermittent problem of the IF going in and out in oscillation (regeneration). Granted it's a bit older (1936) but I think the feedback winding is causing the problem. Did get it apart kind of as the rivets at the bottom of the can won't let the ceramic trimmer pass by. It doesn't have lugs just wires extending out of the top and bottom. Everything looks good inside so I was thinking about use a heat gun and an ohm meter to see if I can get it to act up. I will be sure to resolder the internal connections and hope for the best. When it's working it surprisingly well for a simple set.
Terry