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In Reply to: RE: musical loadlines posted by dave slagle on July 20, 2015 at 09:54:35
"The inductance value required depends on the reflected load"
The reflected load is the operating impedance of the circuit. Rule of thumb for acceptable loss resulting from a shunt inductor is the XL should be no less than 5X the operating impedance. More is better, all else being equal.
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Buy Chinese. Bury freedom.
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I'll agree that in a perfect world... more is better but in the real world, what is the "acceptable loss" caused by finite inductance?
I think there are two extremes at play here. One extreme is a plate choke attempting to deliver maximum voltage with very little current (large value load) and the other an output transformer attempting to deliver maximum current. What I am interested in is discussing the huge grey area inbetween.
When it comes to current delivery to a speaker through an output transformer, increasing the load value increases distortion since the increase of turns ratio requires more voltage swing and any gains from making the loadline more horizontal are lost by the increased voltage demand. This follows the same lines of for a given power output, an 845 will have less distortion than a 45.
dave
"This follows the same lines of for a given power output, an 845 will have less distortion than a 45"
For the reasons you explained this has been my belief ... well it's more than a belief, it's predictable and measurable.
Naz
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