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<blockquote data-quote="gavinbirss" data-source="post: 53603" data-attributes="member: 60"><p>Are there any KT88... DC heated amps ? </p><p></p><p>Can one assume that heater will draw a relatively constant current (power/wattage) and if AC voltage is increased current draw will drop?</p><p></p><p>Also the AC line voltage may also fluctuate but power transformer may offer some regulation.</p><p></p><p>There reverse is also true. Running a 230/240V primary with 220V AC yielding less voltage swing on secondary and reduced power, especially for transistor circuits.</p></blockquote><p></p>
[QUOTE="gavinbirss, post: 53603, member: 60"] Are there any KT88... DC heated amps ? Can one assume that heater will draw a relatively constant current (power/wattage) and if AC voltage is increased current draw will drop? Also the AC line voltage may also fluctuate but power transformer may offer some regulation. There reverse is also true. Running a 230/240V primary with 220V AC yielding less voltage swing on secondary and reduced power, especially for transistor circuits. [/QUOTE]
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