In Reply to: RE: Are there any "issues" with the use of a transformer in place of an output coupling cap (to stop DC)? posted by tesla on January 15, 2013 at 08:32:10:
1. Some transformers can't tolerate any DC in their primary winding, so you would have to use a coupling cap to keep DC out of the transformer so you would not replace the coupling cap. Transformers in audio really are AC devices and DC in their winding requires special construction, ie gaps to prevent saturation. Even in AC, saturation is a problem on peaks. There are many different types of transformers each for a particular application so you need to direct this question to the manufacturer.
2. In audio, you want a low output impedance feeding a high input impedance by a factor of 5 or more to insure good frequency response. It's not like an AC power delivery system where you are concerned about power efficiency at only one frequency. An audio signal is broad band. Ray
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Follow Ups
- RE: "issues" ...coupling cap (to stop DC)? - grhughes 05:05:01 02/17/13 (0)