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Valves / Vacuum Tubes
Manley Amplifiers
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<blockquote data-quote="Ampdog" data-source="post: 38354" data-attributes="member: 144"><p>No, and No.</p><p></p><p>The topology is interesting and straight-forward but somewhat original. Input triode followed by cathode follower as isolation from following stage (improved h.f. response as result of isolation from Miller C of following stage). That is a LTP (Schmitt) phase inverter, feeding 4 x p.p. parallel EL84s. All stages use high current, output stage puts 420V on EL84 UL output stage, but current just low enough to stay within EL84 maximum power spec (fixed bias). But the lady uses very little NFB, resulting in an unimpressive distortion figure of up to 1%. (By the way, a change-over switch between UL-triode is provided.)</p><p></p><p>My question was with genuine regard to experiences of others. I have the circuit diagrams, but hesitate to put on the forum for fear of infringing with copyright.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 38354, member: 144"] No, and No. The topology is interesting and straight-forward but somewhat original. Input triode followed by cathode follower as isolation from following stage (improved h.f. response as result of isolation from Miller C of following stage). That is a LTP (Schmitt) phase inverter, feeding 4 x p.p. parallel EL84s. All stages use high current, output stage puts 420V on EL84 UL output stage, but current just low enough to stay within EL84 maximum power spec (fixed bias). But the lady uses very little NFB, resulting in an unimpressive distortion figure of up to 1%. (By the way, a change-over switch between UL-triode is provided.) My question was with genuine regard to experiences of others. I have the circuit diagrams, but hesitate to put on the forum for fear of infringing with copyright. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Manley Amplifiers
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