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Audio and Video Talk
Valves / Vacuum Tubes
Simple PP circuit using KT88s
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<blockquote data-quote="handsome" data-source="post: 969040" data-attributes="member: 772"><p>The topology is sound. 71V is rather low for a 12AU7, traditionally one uses a pentode here for both its gain and its ability to pull its plate lower but the feedback should straighten out any non-linearity from that stage. Although with 450V of HT The constant current source is a nice addition in the driver stage and will enforce better balance than just a (lowish value) resistor. You would have to either build it, simulate it or break out the pencil and ruler, crank out the load lines and decide for yourself!</p></blockquote><p></p>
[QUOTE="handsome, post: 969040, member: 772"] The topology is sound. 71V is rather low for a 12AU7, traditionally one uses a pentode here for both its gain and its ability to pull its plate lower but the feedback should straighten out any non-linearity from that stage. Although with 450V of HT The constant current source is a nice addition in the driver stage and will enforce better balance than just a (lowish value) resistor. You would have to either build it, simulate it or break out the pencil and ruler, crank out the load lines and decide for yourself! [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Simple PP circuit using KT88s
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