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Audio and Video Talk
Valves / Vacuum Tubes
Help needed with a EF86 driven SE build
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<blockquote data-quote="Mars" data-source="post: 257520" data-attributes="member: 817"><p>Hi All</p><p></p><p>I currently building a single ended amplifier closely following the circuit below:</p><p></p><p><img src="http://www.audiofil.net/data/upload/20080222_130123_Kt88_7a.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>I have built this circuit before, and have always been surprised at how good it sounds. But one thing bothers me. </p><p>Resistor R6 is listed as 470K value. For a 6L6GC that is still within specifications, but for a KT88 470K is at the limit. How would the plate load and screen resistor values on the EF86 need to change if I selected a lower value for the grid leak; say 330K or 220K?</p></blockquote><p></p>
[QUOTE="Mars, post: 257520, member: 817"] Hi All I currently building a single ended amplifier closely following the circuit below: [IMG]http://www.audiofil.net/data/upload/20080222_130123_Kt88_7a.gif[/IMG] I have built this circuit before, and have always been surprised at how good it sounds. But one thing bothers me. Resistor R6 is listed as 470K value. For a 6L6GC that is still within specifications, but for a KT88 470K is at the limit. How would the plate load and screen resistor values on the EF86 need to change if I selected a lower value for the grid leak; say 330K or 220K? [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Help needed with a EF86 driven SE build
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