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Re: PP Iron for SE - repost of a 1996 rec.audio.tubes by "Paul"....

well... we are gonna ge shouted off this fourum any minute now, but what the hell.

Will we? Why? I'm just an occasional reader of this forum so I'm not intimately familiar with the politics.

but you have to remember the old ace in the hole... the loops represent continuos sinusodal excitation, what happens when we put something somewhat intermittant and decidedly non-sinusodal up against that pretty loop with its predetermined origin and virgin curves?

Can't say for sure. But I don't think the presence of a DC offset would cause the basic behavior to be substantially different. You're still going to have hysteresis so it's not just going to go back to the same origin each time.

i have to wonder does the starting point count?

I don't think it would except for a very short period of time.

it isn't as clear cut as an initial curve then a reasonably symmetrical loop, but a random mix of the two happening dynamically.

Certainly. But you were originally asking whether the presence of the DC would cancel out the remnance. I don't see that being the case unless you eliminate hysteresis. And I don't see a DC offset eliminating hysteresis.

this brings us back to the IMPORTANT question of why some folks think that some DC offset improves the sound of some iron??? (or why some people have such fondness of abusing pp iron.... i think they may be connected)

I'd like to think why most folks think it improves the sound is because it sounds better to them. :)

As to actual cause, your guess is as good as mine.

i must admit that prior to you, the ony other person i can recall suggesting publicly that adding DC to a core to improve sonics from an empirical viewpoint is kondo.

Yeah? I've read some of Kondo's stuff but don't recall reading anything of his regarding transformers and DC. Do you remember where you read it? I'd like to see what he has to say.

there has been much theory tossed around about it, but balls on listening is another topic.

Unlike a lot of others, I haven't much interest in theorizing why I like (or dislike for that matter) certain things. I don't even know if my preference necessarily has anything to do with anything that's actually audible. My preference is to simply enjoy the results.

se






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