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Audio and Video Talk
Valves / Vacuum Tubes
Valve driving screens in Leak TL/25A amp
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<blockquote data-quote="handsome" data-source="post: 940790" data-attributes="member: 772"><p>The KT61 is set up as a cathode follower, feeding the screen a signal voltage as determined by the 1M and 2M resistors <em>and</em> the output voltage. It appears to be some sort of screen feedback, like an ultra-linear connection where a portion of the anode signal is fed back to the screens, here the screen is fed a signal based on the output voltage. Or the output voltage is bootstrapping the screen voltage keeping it constant relative to the anode signal. The heater is connected to the cathode to keep the heater-cathode voltage within spec.</p></blockquote><p></p>
[QUOTE="handsome, post: 940790, member: 772"] The KT61 is set up as a cathode follower, feeding the screen a signal voltage as determined by the 1M and 2M resistors [i]and[/i] the output voltage. It appears to be some sort of screen feedback, like an ultra-linear connection where a portion of the anode signal is fed back to the screens, here the screen is fed a signal based on the output voltage. Or the output voltage is bootstrapping the screen voltage keeping it constant relative to the anode signal. The heater is connected to the cathode to keep the heater-cathode voltage within spec. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Valve driving screens in Leak TL/25A amp
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