kyle.wbst@XEROX.COM (10/02/86)
A friend has a new gift of a "Ring-On" Model TL-6630 AM/FM Clock Radio/Telephone with built-in speaker phone feature that has a fairly loud humming noise when using it as an ordinary phone. The sound is similar to the noise I often hear in jumbo jets when listening to music on the headphones (that's a 400 Hz tone, I think). Any suggestions to solving this problem? Thanks, Earle.