On Sun, 08 Jun 2008 11:27:09 -0500, msg wrote:

Search the Sangean ATS803A and Realistic DX-440 resources (Yahoo group,
websites, Usenet archives) -- the rotary encoder can exhibit the same
symptoms and there are recommended cleaning and rework suggestions together
with good photos on the net.

Thanks. Now that I know that I'm probably dealing with a bad rotary
encoder, that should narrow things down quite a bit.