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Audio and Video Talk
The Vintage Audio Section
Leak, Quad, PYE, Dynaco, Radford - Transformer Iron Quality
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<blockquote data-quote="marantz123" data-source="post: 846592" data-attributes="member: 16849"><p>Have an idea here....need expertise input from those with the experience...</p><p></p><p>If its only the iron ( E & I laminations) that is the problem ( as described in the post), is it possible to swop out the old E& I's with new high quality iron? ( whatever it needs...be it high quality cold rolled silicon grain-oriented electrical steel) or better ? Knocking the old E&Is out doesnt seem to be very difficult, but obviously needs patience and care in doing it ? </p><p></p><p>Secondly, Dynaco ST70 power transformers... There is a better spec transformer offered by Triode in the USA. The part has almost twice the lamination thickness of the original, to aid in better cooling and experts here would know what else..flux density/ eddy current stuff etc. The part is abt. $200.</p><p></p><p>Is it possible on the original spec transformer...to change out the E/I laminations with new ones ( if this iron is a problem), still keeping the original bobbin/ winding etc., and then.....build up the laminations on each side without the tongue sections of the E/I....i.e just metal laminations in the form of frames of the same metal at each side of the stack, and then replace the bell-ends with longer screws? ( I have seen the calculator/sheet for working out everything in Mars wonderful posts...so have some idea that the amount of iron is important).</p><p></p><p>This may result in a cooler running transformer, but is more iron better?</p><p>Is there any adverse affect of doing this?</p><p>Will it be beneficial in any way seeing that cost of doing this is relatively minimal?</p><p></p><p>Can this "extension" be done on output transformers without affecting Hz response etc. ?</p><p></p><p>I dont know why Brittany Spears is my avatar. Mods cannot explain.I had a wonderful Marantz woman there n she left. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Thanks</p><p>Marantz123.</p></blockquote><p></p>
[QUOTE="marantz123, post: 846592, member: 16849"] Have an idea here....need expertise input from those with the experience... If its only the iron ( E & I laminations) that is the problem ( as described in the post), is it possible to swop out the old E& I's with new high quality iron? ( whatever it needs...be it high quality cold rolled silicon grain-oriented electrical steel) or better ? Knocking the old E&Is out doesnt seem to be very difficult, but obviously needs patience and care in doing it ? Secondly, Dynaco ST70 power transformers... There is a better spec transformer offered by Triode in the USA. The part has almost twice the lamination thickness of the original, to aid in better cooling and experts here would know what else..flux density/ eddy current stuff etc. The part is abt. $200. Is it possible on the original spec transformer...to change out the E/I laminations with new ones ( if this iron is a problem), still keeping the original bobbin/ winding etc., and then.....build up the laminations on each side without the tongue sections of the E/I....i.e just metal laminations in the form of frames of the same metal at each side of the stack, and then replace the bell-ends with longer screws? ( I have seen the calculator/sheet for working out everything in Mars wonderful posts...so have some idea that the amount of iron is important). This may result in a cooler running transformer, but is more iron better? Is there any adverse affect of doing this? Will it be beneficial in any way seeing that cost of doing this is relatively minimal? Can this "extension" be done on output transformers without affecting Hz response etc. ? I dont know why Brittany Spears is my avatar. Mods cannot explain.I had a wonderful Marantz woman there n she left. :) Thanks Marantz123. [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
Leak, Quad, PYE, Dynaco, Radford - Transformer Iron Quality
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