Quote:
Originally Posted by Jeffhs
...One thing I did not mention in my previous post is that none of my other radios have this problem, only the T/O.
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Are you using the T/O on batteries when the problem's occuring? And have you tried another battery operated radio in the same location?
In any case, try this just as a suggestion: With the T/0 on and displaying the problem, begin unplugging, one by one, every AC line-operated device in the apartment (not just turning off, but unplugging from the wall, every wallwart, electronic device, and appliance). See if the problem disappears or diminishes at any point.
The problem sounds like a classic case of tunable hum*, in this instance re-radiation from the house wiring. This happens due to the power diodes in some device switching the re-radiated signal in and out, causing the distortion.
*Another form of tunable hum can be caused by an open loop antenna in a tube radio (discussed in another thread).