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Audio and Video Talk
Valves / Vacuum Tubes
Line Magnetic 211IA Impressions.
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<blockquote data-quote="Ampdog" data-source="post: 317082" data-attributes="member: 144"><p>Winslow,</p><p></p><p>Great to hear your positive comments on this amplifier, unknown to me (also not much information on the internet).</p><p></p><p>Not wanting to rain on the parade, but kindly - for the benefit of the amplifier - go easy on the switching "on the run" between U.L. and triode. There is with that a change in operating conditions, and the wrong circumstances can generate violent peaks in the output transformr, especially if negative feedback is used, as I believe it is. (Unless they use some funny circuitry to evade that - but all "switchable" amplifers I know of simply switch the screen grid from tap to anode without further ado. If you are a technical person I can explain the dangers, but will leave that be for now.) One can understand the desire to compare, but once you have formed an opinion, I would advise to rather do the change-over when the amp is off.</p><p></p><p>Otherwise enjoy!</p></blockquote><p></p>
[QUOTE="Ampdog, post: 317082, member: 144"] Winslow, Great to hear your positive comments on this amplifier, unknown to me (also not much information on the internet). Not wanting to rain on the parade, but kindly - for the benefit of the amplifier - go easy on the switching "on the run" between U.L. and triode. There is with that a change in operating conditions, and the wrong circumstances can generate violent peaks in the output transformr, especially if negative feedback is used, as I believe it is. (Unless they use some funny circuitry to evade that - but all "switchable" amplifers I know of simply switch the screen grid from tap to anode without further ado. If you are a technical person I can explain the dangers, but will leave that be for now.) One can understand the desire to compare, but once you have formed an opinion, I would advise to rather do the change-over when the amp is off. Otherwise enjoy! [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Line Magnetic 211IA Impressions.
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