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Transformer-Coupled Audio-Frequency Voltage AmplifiersInterstage transformers are sometimes used with triodes. They have a voltage step-up ratio of about 3. If the assumption is made that negligible voltage drop occurs inside the tube, the voltage gain per stage is
where μ, is the amplification factor of the tube and n is the step-up ratio of the transformer.
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Last Update: 2011-05-18