Sound and video not tuning together with digital converter: 1956 philco 21"

[Tubejunke]

Before the loss of the perfectly fine analog TV signal my set worked fine. Now that I have to use a converter for the digital channels the sound is low for one thing and doesn't tune to the best picture. Another device like a VCR is better, but not much better. I haven't tried a DVD yet, but that's not the issue.

Channels 3 and 4 were never used around here, but now they are the only two choices. It is obliviously a matter of alignment which many of us are smart enough to stay away from. I am hoping that someone who does understand this condition and/or is familiar with these sets (one piece chassis) can point me to the right place to perhaps touch this up. It can't be off by much, so I assume that there is a coil somewhere that I can carefully adjust to bring the best sound over the best picture.

I have similar problems with all of my vintage sets when I use the converters. I have three, so it's not the box. Thanks folks!