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Greetings, diagnosis requires lots of accurate data. Do you know how to supply this?Greetings,
Our amplifier keeps tuning a radio program despite been troubleshooted by the technician. What is/are the problem(s) please?
Greetings,
Our amplifier keeps tuning a radio program
Yes, local AM station nearby. It is a speaker/audio amplifier.More information required.
Which amplifier type? Is "radio program" local AM station?
RF is usually invading equipment through connected signal (most likely) or speaker and mains (less likely) cables and demodulated by not well designed circuits.
No noise heard.Next step is to identify the interference path. E.g. what happens if you disconnect the input (microphone, whatsoever) cable.
Right. But depending on the amplifier design, even a shielded cable may inject RF into the sensitive input stage.The cable plugged into the amplifier input MUST be a shielded cable.
YesThe cable plugged into the amplifier input MUST be a shielded cable.