Sencore TVA92 has arrived and is working
I injected composite video to the grid of the video amp with the tuner powered and it had the typical traveling distortion in the image,
Then I killed power to the tuner filament transformer and it cleaned up quite a bit. Even better than when I ran the tuner on batteries.
Next up, I'm going to unmount the transformer and attach long lead to the secondary. I'll power the primary from a separate wall plug. That should allow me to determine if the issue is AV on the tuner tube filaments or a radiated magnetic field.
