[codefox1]

OK, you need to make sure that the tuning capacitor is not shorting. One by one disconnect and use ohmmeter to test all three sections from full open to full close. If there is a short, there might be a bent fin (rotor) that is contacting the stator. Since you are getting reception on the high end or the band, I think this might be the problem.

But if you are testing this in your basement, and there is only one or two local AM stations, bring the set upstairs.

Since you have changed so many components, you probably need to have an alignment done as well. Check to see if there are any locals who would have the equipment to help you do this.