Beolit 707 Hum

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Ramzis Posted: Wed, Aug 1 2018 8:52 PM

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hello

My 1975 Beolit 707 has a background hum on all the bands. Its reception is great and its sound too but there is a background unusual hum.

could it be a capacitor? Anyone has faced a similar problem?

thanks

ramzi

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Dillen replied on Wed, Aug 1 2018 11:08 PM

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Are you using it on batteries or mains?
If on mains, check the filter capacitor and the rectifier diodes. 

Martin

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Ramzis replied on Thu, Aug 2 2018 8:52 AM

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Hi Martin,

I am using it on the mains. Shall I replace the capacitor and the 2 diods in the power supply? 

Do you knows their values?

I was unable to read the value of the capacitor...perhaps a 1000uF or 100uF? 

What about the value of the 2 diods? 

Thanks,

Ramzi 

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Dillen replied on Thu, Aug 2 2018 3:47 PM

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Are they bad?

Martin