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Audio and Video Talk
Valves / Vacuum Tubes
Output Transformers
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<blockquote data-quote="Mars" data-source="post: 252667" data-attributes="member: 817"><p>Turner suggest this formula:</p><p></p><p>Afe = 300 x sq.rt ( audio power, Watts ), in sq.mm (<a href="http://www.turneraudio.com.au/output-trans-PP-calc-2.html" target="_blank">http://www.turneraudio.com.au/output-trans-PP-calc-2.html</a>)</p><p></p><p>So you should aim for a Afe = 300 x ^/(25) = 1500 sq mm or 15 sq cm</p><p></p><p>This gives you tongue width of sq rt (15) = 3.8cm (which is exactly the width of a EI114 lamination)</p><p></p><p>So you need to start with a 32mm tongue (50mm stack) or a 38mm tongue (38mm stack)</p></blockquote><p></p>
[QUOTE="Mars, post: 252667, member: 817"] Turner suggest this formula: Afe = 300 x sq.rt ( audio power, Watts ), in sq.mm ([url=http://www.turneraudio.com.au/output-trans-PP-calc-2.html]http://www.turneraudio.com.au/output-trans-PP-calc-2.html[/url]) So you should aim for a Afe = 300 x ^/(25) = 1500 sq mm or 15 sq cm This gives you tongue width of sq rt (15) = 3.8cm (which is exactly the width of a EI114 lamination) So you need to start with a 32mm tongue (50mm stack) or a 38mm tongue (38mm stack) [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Output Transformers
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