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Salerno 2230 radio is humming

The radio can pick up signals and technically works. Although the speakers are very quiet and the is a very lound hum playing from the speakers on all sources. I am in the uk and have to use a power adapter to plug it in. Dunno if this makes a difference but it seems worth mentioning.

Comments
torokj
torokj picture

Hello Daniel,
First of all ,switch the voltage selector at the back to 240 volts.
Check the power supply ,selenium rectifier (B250C100),C796.797  2*50 uF capacitors.
The EL84 output pentode can also cause the phenomenon.
schema

Good luck to repair.
tj

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