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Audio and Video Talk
Valves / Vacuum Tubes
How Much Audio Bandwidth must Output Transformers have?
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<blockquote data-quote="marantz123" data-source="post: 982467" data-attributes="member: 16849"><p>This got me thinking about something, never have I thought about the higher audio-frequency loss across a transformer, similar in some way to the losses in an inductor (low pass) as used in an audio crossover circuit. I read a while ago that output transformers are more expensive as the size goes up, hence design for the best budget but nothing of a drawback in going bigger.</p><p></p><p>So heres a thought, three methods of coupling that is common...Direct, Capacitive and Transformer coupling. Has there ever been a "hybrid" form of this where compensation for high frequency losses could be achieved ? (not referring to inter-stage coupling which is practiced) A crude example I am thinking of....is it possible to use a larger output transformer and get whatever benefits there are from this and compensate for the higher audio frequency losses with a suitably calculated capacitive network coupled to the primary winding to filter those frequencies and add them to the output signal in some way ? </p><p></p><p>This may belong elsewhere under a new topic (or deserve junk status), if desired it can be moved if needed, not meant to detract from where we are currently but related to bandwidth and frequency response.</p></blockquote><p></p>
[QUOTE="marantz123, post: 982467, member: 16849"] This got me thinking about something, never have I thought about the higher audio-frequency loss across a transformer, similar in some way to the losses in an inductor (low pass) as used in an audio crossover circuit. I read a while ago that output transformers are more expensive as the size goes up, hence design for the best budget but nothing of a drawback in going bigger. So heres a thought, three methods of coupling that is common...Direct, Capacitive and Transformer coupling. Has there ever been a "hybrid" form of this where compensation for high frequency losses could be achieved ? (not referring to inter-stage coupling which is practiced) A crude example I am thinking of....is it possible to use a larger output transformer and get whatever benefits there are from this and compensate for the higher audio frequency losses with a suitably calculated capacitive network coupled to the primary winding to filter those frequencies and add them to the output signal in some way ? This may belong elsewhere under a new topic (or deserve junk status), if desired it can be moved if needed, not meant to detract from where we are currently but related to bandwidth and frequency response. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
How Much Audio Bandwidth must Output Transformers have?
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