Video Problem need help

[John Marinello]

That's a 60 cycle hum bar caused by a ground loop, in both cases. Yoda, if you're lucky, your balun (matching transformer) is shorted, and you should be able to verify this with an ohmmeter. It should measure infinite between the 75 - 300 ohm ends. If it's not shorted, then you have poor isolation between your DVD player and your modulator. Kbmuri, your ground loop is probably between the source and the Ramsey. One way to narrow it down is by plugging individual equipment into an isolation transformer. Best to take your ohmmeter with you to Radio Shack if you find you need a new balun.