I've sent my radio in for repairs 3 times. The AM and SW works for a short time, but then all I get is Humming. FM works fine. I've used the whip ant. and the ext ant. Nothing seems to work. Any help would be great.
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Re: I have a Grundig Satellit 500 "Radio Boy"
If you sent it in 3 times, then I would suggest getting a new one if you know for sure that other's work in that area. If other's don't work, then then you have some type of interception between the radio waves and your radio. There is nothing I can do about that, and probably nothing you can do.
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Offhand, can you pls try and do a reset. This model don't have a reset button, but you can try removing the batteries for say an hour or so. The idea is to reset the microprocessor if the problem is software/firmware. Preset/memory would be erased as well as any personalized settings if you do this. But the unit will be back to factory default.
If the reset doesn't work, then your particular version/model has a slight offset resulting to the "humming sound". This is a known problem and many in the "ham" world have written corrective procedures which would require an insulated tuning/alignment screwdriver or at the very least a jewellers screwdriver and doing a bit of alignment by "ear"
If you are adventurous to give this a try, pls post back. Otherwise your best bet would be to seek the services of a qualified ham radio technician.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Assuming its broken outside the unit: most aerials are very similar to fit, serving the exact same function and not worth the cost of locating the exact same one used for your model due to time, and purchase costs.
Find an old transitor radio with similar sized aerial, ie length and diameter to fit your radio. Measure it and the replacement from an old radio you or a friend does not need.
Purchase a small screwdriver to remove and refit aerial to your grundig. Small sets of screwdrivers can be bought cheaply from discount stores, ebay etc.
I had such a pb.
IC 103 CX7961 stopt to oscillate after ~30s ...
so the plls ref was out
I changed it without results
In fact the plastic trimmer C138 (4-20pf) was bad???( insulation?)
Since changing (10 years ago) : no problem