On 3/22/11 23:18 , bpnjensen wrote:
On Mar 22, 4:14 pm, "D. Peter wrote:

Check the antenna select switch, and the DX/Local switch. It
sounds like you have some oxidation in your unit. These switches, if
oxidized, will produce the very symptoms you describe, especially
true if FM is now working.

Throw these switches several times. Move the toggle in a circle
until you get some change in the noise.

I experience this regularly with my own Sat 500.

Could you get the same results with a squirt of cleaner in the switch
innards?


You could. Wearing through the oxide is a better solution for
serveral reasons. Cleaners tend to dissolve, or at least soften,
existing lubricants within the switch, which can cause them to migrate
into contact areas, attracting dirt, rehardening into films that
interfere with contact. Or worse, creating corrosive elements by
chemical actions between the cleaner, the lubricants, and some airborne
crap. Which necessitates more frequent cleaning of the switch.
Eventually, replacement is required.

Cleaning may produce a result, but it often comes at a cost of
shorter switch life.