Grundig Satellit 800 - has a loud Hum that repeats at intervals all accross the AM and SW bands
Just purchased this unit. It has a loud annoying "hum" that blocks out stations and repeats accross the AM and SW bands, I am sure blocking out the reception of stations. The RF meter shows little RF strength at these spots which suggests to me the hum's source is internal to the unit. This happens with the built in whip attenna and with a external 30 foot bare wire antenna that has a 50 ohm shielded (grounded) cable running out of the house. Any ideas...
Re: Grundig Satellit 800 - has a loud Hum that repeats at...
I have the same problem with the buzzing sound up and down the shortwave bands. I have read somewhere the noise is generated inside the radio by the DC up converter used to power the LCD display.
I have noticed that if I move the antenna 30 foot away the noise was gone. To do this you need at least 30 foot of 50 ohm coaxial cable terminated with a 50 ohm balun and the shield grounded
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On the rear where the power adapter plugs in, it should show in input voltage and polarity. Check the power supply output voltage with a volt meter. Generally, it is the sum total of all the batteries, so it if takes 4xAA @1.5 volt batteries the voltage would be 6 volts DC. It sounds like it is faulty.
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.
HI, THE FIRST THING YOU HAVE TO LOOK FOR IS WHAT KIND OF ADAPTER 9V 1AMP YOU SHOULD HAVE FOR THAT PARTICULAR RADIO AND ANTENNA FOR SW AND FM SHOULD BE CONNECTED.IT MUST BE THE ADAPTER THAT'S ON THE OUTS NOT ENOUGH VOTAGE TO POWER THE RADIO.