[TomBoy]

Thanks for the quick reply. I have found that the noise is worse or better depending in which receptacle I have plugged the cord into. Then I plugged the Philco into a special receptacle that has a Cornell Dublier EMI filter installed and that seemed to help. However that did not totally solve the problem.

By the way, when I replaced the power cord, I used a 3 wire grounded cord and the ground pin wire has been connected to the chassis.

On the AM band I have the local oscillator above the station frequency.  Perhaps I will try to tune the LO for the SW band above the station frequency as well. However, it probably should not make a difference.