1. In direct coupled amplifiers (Transistor Coupled), how can I reduce the RF interference (produce "Blast" nouns during the operation of AC switches or AC appliances such as Tube light)? It is the head painful problem in such open-handed of amplifiers.
2. Is the above problem may persist surrounded by MOSFET type amplifiers?
3. Today why the Darling series are highly preferred than adjectives PN junction transistor? Can you confer the advantages and drawbacks of Darlington Transistors?
Answers: 1)>AC filters on the principal power cord and rectifier bridge.Also a good RF shield for amp and low signal wires.
2)>The transistor type is not the problem!!
3)>I don't know!!
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