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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Roman,[quote user="Romy the Cat"]Nevertheless, if that bass was truncated between the stages then the devastations are way more severe. [/quote]That may be so, however an LF response of less than -0.1db down @ 10Hz is what is normally called "ruler f...
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Romy, in the contrary, it is very unfair to compare my 845 amp with the 6C33C. The main reason is the 845 amp used the best output/interstage transformer available, while the 6C33C's output xformer is pretty good but far from being best for the 6C33C...
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As to the best transformers souding more transparent than the best resistors, I'll believe it when I (don't?) hear it. You claim to have heard this but I most certainly haven't. Based on theoretical arguments the noninductive metal film r...
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[quote user="haralanov"] According to a friend of mine, who has a lot of experience with GM70, this tube starts to sing only with (very high quality) interstage transformer coupling. He told me that when it is used with coupling capacitor (as is the ...
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Jim,UL has applied a compatability test to insulation materials since 1976. This test places representative amounts of each material, found within a potential transformer coil, in a test tube. This tube is then evacuated and subjected to infrared hea...
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Ok, let dive a little bit further into my examination of the subject of Lamm ML3
What is important is to undusted that my view less targets the Lamm ML3 but rather it targets the ML3 as a representative of entire class of amplifiers. When I to...
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This material is courtesy to Mr. Shibazaki, the owner of Sibatech Shop in Tokyo, that sell internationally Japanise Hi-Fi equipment.
http://www.sibatech.co.jp/
I hope that Sibatech people are more decent then our american distrib...
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[quote user="Romy the Cat"]Ok, let dive a little bit further into my examination of the subject of Lamm ML3
What is important is to undusted that my view less targets the Lamm ML3 but rather it targets the ML3 as a representative of entire cla...
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[quote user="KOTriode"]Romy, in the contrary, it is very unfair to compare my 845 amp with the 6C33C. The main reason is the 845 amp used the best output/interstage transformer available, while the 6C33C's output xformer is pretty good but far from b...
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Panos, it is not about convincing me. My standing is absolutely irrelevant in this subject – I do not sell audio and do not making living by evaluation of SET amplifiers. I report what I have witnessed, nothing more. Sure, it is very possible that y...
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In my upcoming DH Milq MF DSET I will have an Innerstage transformer and output transformer. The loading of output tube has known effect to harmonics vs. transients, it is know, it is predicable and it is manageable. The Innerstage transformer might ...
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Nope, I do not have any proof to the rumor as I do not use the Japanese transformers. I heard them many times, was not liking the entire sound of the playbacks (do not blame only transformers for that) but since I never myself dealt with Japanese tra...
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[quote user="Paul S"]"...Obviously I will have to keep a closer watch on the OPs..."[/quote] Paul,Though I don't let my ML2s go more than a month without verifying the bias, once, due possibly to a screwy tube, one ...
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I have a 10KVA Isolation transformer that feeds on two separate 8 ga cables running direct from the house meters into an breaker into de transformer. This breaker is the one I use to turn my system on and off. The Isolation transformer recieves two ...
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Hi,[quote user="morricab"]You may be right. It would perhaps be worthwhile to look into "better" transformers but I am not sure that an advantage can be found over just going RCA to XLR adaptor into the balanced inputs and thereby bypassing the...
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[quote user="Romy the Cat"]Sure, there is nothing wrong with a transformer-attenuator if it has a pure restive load but as we know it is never the case. If we need a drop voltage elsewhere then we use resistors, right? We do not we use transformer-at...
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Hi,[quote user="Romy the Cat"]However, even if you did succeed to preserve dynamics in your line-level transformer then the LF cut off of this transformer will “get” you. The solution is very simple: do not run any transformer attenuators within a re...
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Since I know about a few ongoing attempts out there by different people to build Melquiades I would like to share with some of my observations regarding corrections, simplification and possible modifications of Melquiades amplifier.
Obviously you ha...
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[quote user="oxric"] You may find it surprising how builders take an idea and make such profound changes to it that it is barely recognisable. One person I approached wanted to change the output tubes, because he considered the 6C33s, I quote, " a de...
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After years of using the Expressive Technologies SU-1 and SU-2 step up transformers I come across to a fact this morning that the Expressive was reviewed by Robert Harley in June, 1992. I read the Expressive’s preamp review but I never seen this one....
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I made experiments running HF filaments from dedicated Hammond 6.3V transformer vs. lifting ground on my 6.3V IDH filaments. I did not listen Sound but rather measure the noise – the result was identical. In the best cases I was able to get 0.63m...
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This post will be in a way off the wall as it has little relation to the regular subject of my site. I have quite enough people out there who love to spread rumors about me. I rarely ague with them and prefer juts to send those people to hell: come o...
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[quote user="Romy the Cat"] Well, I figured out – if digital is dead then I need to put the heavy artillery in the fight I begin to spin records. With my TT setup I have an interesting tool - I run my input-choke powered “End of the Life” Phonostage ...
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Hi Romy,I realise that this is a very old post, but you might want to take a look over here=>> http://www.valvediy.com/simplexpg1.htmlThe article can be downloaded as PDF, the writer Ari Polisois developped a new kind of transformer called SC O...
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I do know why it is necessary for anybody tell you anything – use your own judgment. Leaving aside the advantages and disadvantages of transformer coupling use you own common sense to think about the bandwidth of the transformers loaded with se...
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[quote user="mark"]with reference to the LL1627a as used in full range application in melq.you mentioned a good choice gapped at 200 ma but i would prefer 300ma but they do not do it.i had k and k check with lundhal and they will do it and at the sam...
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After spending considerable amount on the hum problem, one way to fix it is tho remove transformer and place it in a different chassis, the noise level will improve more than 15 db to -74db. But that cause too much hassle, so I got it improved to 62d...
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I never seen any insulation transformer to do the effect that you depicted. No transformer will correct the waveform unless it is a resonating transformer (Ferro, parametric or any other type). In any case it has have a cap to crate own resonance. Ab...
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It is unfortunate that this thread will not lead to anything practical or tangible to me personally, so any talk from me are very much worthless. Still from the purely conceptual perspective I would like to explain why I would prefer non-transformer ...
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Anthony, I do not know anything about them. I used Jensens, Altecs, EVs, Ears, Shelters, Grahams, UTCs, S&Bs, Otophones, Tamuras, Denons, Cotters, ET, Siemenss, Sowters and few others no-name transformers and I can comment of them. I only heard a...
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