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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="handsome" data-source="post: 986943" data-attributes="member: 772"><p>PP transformers are always smaller than the equivalent SE transformer so they need less iron (size) to achieve the same inductance. Toroidal and C-core transformers are more efficient than EI transformers (the traditional squarish jobbies) and so they can be even smaller. </p><p></p><p>Much is made about designing high quality/bandwidth audio transformers but lets not forget wayyy back when Pye as Charles pointed out, had 160kHz amplifiers, Leaks did over 20kHz, Radford, Partridge and Quad too....oh and Rodgers, and thats just the UK. Across the pond Dynaco, Scott, Fischer, Marantz, Harmon Kardon with triple nested feedback loops (you need bandwidth in your transformer to do that) oh and lets not forget Macintosh who were kicking that stuff out in the ?40s. And thats not counting the countless other brands from around the world. Really, getting 20-20kHz out of an output transformer wasn?t much of a challenge then or now as Ampdog previously noted.</p></blockquote><p></p>
[QUOTE="handsome, post: 986943, member: 772"] PP transformers are always smaller than the equivalent SE transformer so they need less iron (size) to achieve the same inductance. Toroidal and C-core transformers are more efficient than EI transformers (the traditional squarish jobbies) and so they can be even smaller. Much is made about designing high quality/bandwidth audio transformers but lets not forget wayyy back when Pye as Charles pointed out, had 160kHz amplifiers, Leaks did over 20kHz, Radford, Partridge and Quad too....oh and Rodgers, and thats just the UK. Across the pond Dynaco, Scott, Fischer, Marantz, Harmon Kardon with triple nested feedback loops (you need bandwidth in your transformer to do that) oh and lets not forget Macintosh who were kicking that stuff out in the ?40s. And thats not counting the countless other brands from around the world. Really, getting 20-20kHz out of an output transformer wasn?t much of a challenge then or now as Ampdog previously noted. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
How Much Audio Bandwidth must Output Transformers have?
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