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![]() Andre Jute continues to be scorned by the cognescenti..... And must be tired of running and trying to hide..... Anonymous wrote: Run, Rabbit, Run was Magnequest transformer inductance These excuses, in advance, are offered by Patrick Turner of Turner Audio, Canberra, for the failure of his transformers in blind tests, if and when he ever winds any. Its clear that the blind testing results of output transformers yeilds no sensible results. Does anyone wonder why we bother with the fantasies of this nobody? Does anyone bother with your fantasies??? Does not the majority of those at RAT and now also Aus.hi-fi think that Andre Jute is wasting his time, again, and again, and again? No one is likely to put Turners transformers, if there were ever to be any, in a blind test of this magnitude - - - but he has his excuses on the record for their failure! I see you have run out of things to say which have meaning. Andre Jute goes on to say I re-published the work of the late Bill May, without permission, and infringed copyright. I chose an extract to repost to allow discussion on the summary of inconclusive conclusions about the measurement and listening tests. But Andre Jute has reproduced the whole of Bill May's text, and I don't see any permission from anyone for this. Yet he calls me a thief. Yawn. Who gives a farnarkle? Unfortunately, Andre Jute does not offer the audio world any reliable method on which to base a choice of output transformer. It would be ridiculous for any one maker to have to depend on having his products tested in blind testing a la Bill May's efforts, in order to be considered a credible alternative to the rest, because Bill's testings are not able to produce a result where a number of people in a test of 13 different transformers didn't all agree on just one which was the best. Regular testing of output transformers enmasse is not a common occurence. I have successfully demonstrated my products at audiophile meetings, and I sustain sales of products because people vote with their ears after listening with a large range of other amp systems. I do not spend any money on marketing, promotions. The amps just sell themselves. This is grotesque, unusual, bizarre, unbelievable. GUBU, an acronymic shorthand for Turner and his non-existent transformers. I have made it perfectly clear to everyone, on the world wide web, that I am an amplifier maker, and I do not operate a business for the sole purpose of winding special transformers.. I wind all my own tranformers for my amps, and I see no reason why the performance of these items does not equal or exceed the best produced in the world. The craft and skill involved in winding great sounding, and great measuring output transformers is not an insumountable challenge. AFAIK, Andre Jute has not wound a single transformer, nor constructed a single amplifier for sale to the public. He is grossly inexperienced, yet thinks he is well qualified and has the right to pour scorn on all I make, having never seen, owned, or listened to anything I have made, and he has made no attempt to contact those who have. I have no intention to lead him to those who have, because I know they'd regard him as a boring old wind bag. Andre, the more you denigrate my products, the more obvious it becomes that they are quite competitive, and great value for the money. I think I have almost said enough. Should anyone want to purchase a set of hand made transformers, they must realise they are not the cheapest, because I only build to order, one at a time, and my costs are higher than mass produced items. There would be a long lead time for delivery, since I am engaged in audio amp contracts for the next 3 months at least. Andre Jute is unable to make any meaningful recommendation to anyone about where to shop for a good transformer. Andre cannot conclude anything from Mr May's tests. I have mentioned a host of reasons why the inconclusive tests carried out by Mr May don't mean much, which Andre says are "excuses" but he has no replies to the comments I made. Patrick Turner. Andre Jute Patrick Turner ) Ross Matheson wrote: refer http://tinyurl.com/vrsz Thanks Ross for the search and find. I also got a blank page when I went to the reference quoted by Jute. In case anyone couldnt see the reference, I copied the conclusions by Bill May, for all, and place some comments below:- - - - - - extract from Bill May article reprinted without permission by Patrick Turner, a clear theft by Turner(1): The chief facts to emerge from these tests are that with regard to selecting output transformers for listening pleasure and fidelity: data sheet measurements and reputation must be supplemented by other means to predict listening pleasure careful weighting of measurements on hand of experience goes some way towards an initial rough selection sighted listening tests are too subject to the effects of reputation and hype to be used as a predictor of listening pleasure blind listening tests prove that some reputations are earned blind listening tests prove that a high reputation achieved by hype is no guarantee of listening pleasure blind listening tests prove that high price is no guarantee of listening pleasure blind listening tests prove that an industrial appearance, if kept out of sight, is no bar to listening pleasure blind listening tests prove that a modest price is no bar to listening pleasure success in blind listening tests is not always a guarantee of fidelity in reproduction blind listening tests should therefore always be used but only in conjunction with careful interpretation of the measurements Incidentally, after examining our results the Japanese manufacturer chose the mid-price Tango for sonic, marketing and financial reasons. The late Bill May spent forty years in high tension electricity supply. A long-time tube hi-fi hobbyist, he was then technical director of Real McCoy Audio, a design and prototyping shop. Bill May quote ends. - - - - - - - - Here start excuses by Patrick Turner Methinks if you conducted 10 blind tests, with ten different people at each session, you might get 100 different choices if finally, you asked those present to cast a secret ballot for which one they would each buy. It seems to me the unpredictablities involved would make it almost impossible to earn oneself a reputation for good OPT sound at any listening tests. One could make the very best measuring OPT, and fail to make any impression that would lead to a sale with some folks, but then others might be impressed. Then folks who hate tube amps might be repelled, or converted. Any outcome from blind testing of OPTs seems a most unreliable way of discerning which OPT is best. One could also say that from all this, perhaps the OPT is just as important as any one of other factors, say brand of output tubes, caps, resistors, chokes, rectifiers, cabling, terminals, solder, hook up wire, chassis materials, circuit topology, FB usage, driver tubes and all the preamp details, and what day of the week it was, and weather conditions, and the choices might be all different again with varying peices of music used for the test, or the levels at which it is played, and the order in which the amps are tested.. I can understand why some makers would try to bluff their way towards sales, with slick marketting, for money soils the soul, and that no matter what is said at a website, its no indication that their tranny is the best. So why would someone take great pains to describe just one brand as plain crummy? And obviously, with such a vague lot of conclusions about OPTs, then the ordinary DIYer who knows what he is doing with wire and iron could possibly build something which could be judged by someone, some time, some where, as being somewhere between utterly wonderful, and plain awful. I have never worried about these sort of tests, which raise as many questions as they answer, I just get on with it. I have never taken part in such tests as described, with so many entries to judge. I have taken part in tests when just one other maker challenged me in a sound off. People could tell between only two contestants. I think tube amps are like wines. There is no "best wine". Not amoungst ordinary untrained people. Maybe amougnst wine judges. But amp maker can be well pleased if his vintage produces smiles all round, and when the next fellow opens his bottle, to refill the glases, more smiles. Pity the fellow with the solid state amp, he needs luck that his tipple is not judged as vinegar. Patrick Turner. - -- - - - - - - - - - - (1) Turner deliberately ignores the wishes of the copyright owners that out-of-context snippets should not be published. To republish someone elses copyright material contrary to their wishes is outright theft. Here is the copyright notice: Copyright 1998 William May and Real McCoy Audio This article may be reproduced free of charge for DIY and amateur use as long as the entire article including the copyright notice and this permision is rendered complete and unaltered. Turner is also a commercial entity, specifically excluded by the copyright owners. Here, in restitution by me on Turners behalf, is the full article: Selecting an output transformer by Bill May Your average audiophile is lucky if he gets to hear two or three output transformers before he makes his choice. It probably takes him a lot of time and organization to hear that many. So how does he make his choice? There are only three ways: listening to enough transformers under controlled conditions to make a choice, buying on measurements, and buying on recommendation. Listening to one or two or three isnt really enough. For the test to be meaningful, the transformers must be installed in duplicate amps, or at least in very similar amps. For the choice to be meaningful, the transformers must be installed in an amp very similar to what the user will build. He can study manufacturers spec sheets. Some manufacturers lie, or take their measurements in such a way that they are not truly relevant to any real-life amplifier. Thats before the hype even starts. Those who read the hype can easily be misled into thinking there is a single figure of merit for a transformer. It can be bandwidth, low bass extension, power handling. It isnt true. Any transformer that will sound good has all its desirable technical features in balance. The hype includes the price and the reputation of the transformer. That makes sighted tests suspect to any engineer. He can ask for recommendations. The problem is that those who recommend a particular transformer may have heard only that transformer, or perhaps one other, and possibly not in suitable amplifiers. Or the recommendation may be informed by nothing more than spec sheets and hype. In the end, only relevant, blind listening tests count. This doesnt apply only to the average audiophile. Even professionals can be taken in! Here is an example of how measurements, hype and sighted tests can produce different results These tests were conducted to choose the output transformers to be used in an amplifier Real McCoy Audio was designing for Japanese manufacture. The manufacturer intended us to choose between the six most expensive Japanese transformers. The cheapest Tango, the Swedish Lundahl, American Magnequests and British Audio Note UK transformers were added as statistical controls, and the no-name potted Chinese and open-frame Russian ones as placebos. The electrical ratings are for weighted results of measurements taken in circuits optimized to the transformers. In the sighted tests knowledgeable listeners were permitted to see the transformers and were told their relative prices, if they asked. I have included a price scale, on which 1 is expensive and 5 is cheap. In the blind tests no-one in contact with the listening panel knew which amp was playing. The sighted tests were conducted after the blind tests. Several of the tests were repeated with a different listening group to confirm the result. Table reads in 12 pt Courier. RATING ELECTRICAL LISTENING TEST LISTENING TEST - MEASUREMENT SIGHTED BLIND 1 Tango 1 Tango 1 Lundahl 3 2 Lundahl 3 Tango 2 Nature Snd 1 3 Tamura 1 Tamura 1 Tango 2 4 Nature Snd 1 Nature Snd 1 Tamura 1 5 Nature Snd 2 Magnequest 1 Tango 1 6 Tamura 2 Nature Snd 2 Nature Snd 2 7 Tango 2 Lundahl 3 Audio N UK 4 8 Magnequest 1 Tamura 2 Tamura 2 9 Audio N UK 4 Audio N UK 4 Russian 4 10 Magnequest 2 Magnequest 2 Magnequest 1 11 Tango 3 Tango 3 Tango 3 12 Chinese 5 Russian 4 Chinese 5 13 Russian 4 Chinese 5 Magnequest 2 The Measurements column holds no surprises. On measurement, all of these except the Russian transformer are good performers. Some audiophiles scoff at the idea that a set of electrical measurements may predict the outcome of taste tests with certainty. That is true. But if one lowers the expectation a little, correctly weighted measurements will at least eliminate components on which further time should not be wasted. That proved the case here. Of the bottom five in the measurements rating, only one transformer is not in the bottom five in the blind listening tests. The Blind Listening Tests in the last column hold several surprises. A comparison with the Measurements table shows that the best-measuring transformer does not always sound the best. Price comparisons show that the most expensive transformer does not always sound the best, even within the same brand. The high rating of the Russian transformer shows that precision is not as highly valued among the musically inclined as engineers would prefer. The Russian transformer rose so far above its measurements in the listening tests because its inaccuracies are aurally pleasing in the "presence range". One of the listening panel noted in his Comments block: "Who cares about accuracy when you can have ecstacy." The Sighted Listening column shows the effect of brand name, hype, and possibly of appearance. Comparison with the Blind Listening column shows that some reputations are earned and some are not. The same comparison shows that an industrial physical appearance can depress the sighted rating of a transformer like the Lundahl which measures exceptionally well and in the blind listening tests came first. Equally hype can boost the sighted rating of a transformer, like both the Magnequests, well beyond its rating in either measurements or on blind listening. A comparison between blind and sighted ratings of the Japanese transformers is interesting. It shows that even where appearance is not a consideration, and the reputation is earned, knowledge of relative price can distort the rating. The chief facts to emerge from these tests are that with regard to selecting output transformers for listening pleasure and fidelity: data sheet measurements and reputation must be supplemented by other means to predict listening pleasure careful weighting of measurements on hand of experience goes some way towards an initial rough selection sighted listening tests are too subject to the effects of reputation and hype to be used as a predictor of listening pleasure blind listening tests prove that some reputations are earned blind listening tests prove that a high reputation achieved by hype is no guarantee of listening pleasure blind listening tests prove that high price is no guarantee of listening pleasure blind listening tests prove that an industrial appearance, if kept out of sight, is no bar to listening pleasure blind listening tests prove that a modest price is no bar to listening pleasure success in blind listening tests is not always a guarantee of fidelity in reproduction blind listening tests should therefore always be used but only in conjunction with careful interpretation of the measurements Incidentally, after examining our results the Japanese manufacturer chose the mid-price Tango for sonic, marketing and financial reasons. The late Bill May spent forty years in high tension electricity supply. A long-time tube hi-fi hobbyist, he was then technical director of Real McCoy Audio, a design and prototyping shop. Copyright 1998 William May and Real McCoy Audio This article may be reproduced free of charge for DIY and amateur use as long as the entire article including the copyright notice and this permision is rendered complete and unaltered. -=- This message was posted via two or more anonymous remailing services. |