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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I already have some PY500 (it's a sign =))) ) and I have 836 too.I read about Malquiade amplifier threads.So it seem peoples on this forum like horn speakers (I love them too) and are looking for fast transient response, it's exactly what I like.But ...
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My DSET amplifiers are starting to go together (slowly).Bias string and bleeder relays/resistors...The remainder of the filter caps. The middle floor goes on and the filter cap for the First Stages (6E5P/6E6P).Then the OPT's go in place and the shel...
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[quote user="N-set"]I'm well aware of your discovery. But I find it somehow a cheap trick. This is a purely irrational feeling, absolutely irrelevant for you and your system. [/quote] I world not call it irrational, in fact it is very rational and I ...
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[quote user="AnonymousUser"]Thanks for your response! I have never tried grounding the cathode in any of my tube projects. Even my amp output stages have been mostly cathode biased. But I am going to try grounded cathodes (and the +/- input stage sup...
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[quote user="KOTriode"]Romy,I looked at your Melq schematic : http://www.goodsoundclub.com/PDF/Melquiades_SET.pdf regarding the 6E5P bias. Would it be simpler to use two alkaline battery in place of R5 to provide 3V , or 3 Rechargeable for 3.6V ...
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[quote user="Romy the Cat"]To simplify everything: the Melquiades was at attempt to make two stages, capacitor coupled, no feedback SET, having the cathodes sitting on ground and using the unique 6E5P as a driver. My selection of output tube was beca...
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Thanks for your help Romy. Have a look at this (barely legible) sketch so we have a common reference:This is Channel B First Stage bias circuit. All is identical to your published schematic apart from R9 which I had to increase to get the other sta...
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Thanks Romy!I went with two tiers as I do not have much space between the speakers and the side walls as I have a 2.5M cabinet on the front wall.I named my amp Koshka as I always felt Koshka made a contribution to the development of the Melquiades an...
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Thanks again guys,
I should be getting out of the virtual CAD horn world, and into the physical horn world for the Mid and HF horns some time very soon. The Bass horns have not yet been designed, but are going to be something like 10 feet in lengt...
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Well, I have little comparative experience of this cos the required chokes get huge and expensive, but some people I trust swear by low DC resistance chokes; they feel that this parameter is so important that they will sacrifice inductance to achieve...
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[quote user="cv"]Romy,Are you currently implementing "nominal" 3200Hz x/o on the mid range channel S2 using a cap at the driver? I know this works nicely to ameliorate the "secondary" resonance of the plastic edged diaphragm.Reason I ask is because t...
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I have a preference for making the power supply a certain way and using certain types of components. If I do that and am consistent about it, I can get better results from some of those old tubes than I can from the more recent types. But hearing one...
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Sorry Romy, i can't tell you about life longevity of 6E5P in my amp 'cause i'm not using them there anymore :)For my speakers two-stage SE sounded much nicer, more balanced and clear with more volume. Well at least it was easy to predict, considering...
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[quote user="scooter"] One thing is sure: either the user's measurements or the SMS has a serious issue.[/quote] Yes, I read it and this is why I would like to open the SMS up and to see myself what it does. I still have no idea who to open it. I do ...
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I had in my basement Marchand X26 crossover that I use over 10 years back. Since my B-2 power amp with passive filter is being fixed I setup the stock fixed B-2 with external Marchand active crossover. I spent some time to modify the Marchand X26 bi...
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[quote user="ArmAlex"] Romy, I plan to build Melquiades. But there are couple of questions:1-One of speaker options is Gryphon Trident, it is an active bass speaker so Mel should drive MF & HF only. In your opinion can Mel drive these speakers? ...
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N-set, actually, I have seen a stacked-L schematic like you posted, with stacked caps layered over and R at earth for the tank, and I am on record as saying it is very elegant. So, sorry to be such a skeptic, but I learned a long time ago that the o...
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This is what I try to stick to: Try to create closed magnetic (steel) loops around magnetics. Ideally acompany itwith closed electric (copper) loops. This I think Pieter has done that already for you, but,as Romy impicite suggests, double boxing will...
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I see now. Quad can’t be driven by single 6C33C. This is well know fact and I did a lot of experiments with Quads and Lamm ML-2.0. For whatever reason as ML-2.0 drives Quads it produces Stingy Sound. I can’t explain it but it is not the sound that ML...
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Perrew,
LCR is not active at all; it is the very same passive EQ as your RC? I think you a bit confused with terminology. The main logical explanation (there are many of them) is that capacitive filtration is very bad one and need to be minimi...
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The two stages 7788-7721 phonostge can go at near 70dB and it were what I was intended to put in that Chinese chassis. I would like 6-10db more. A transformer? A semiconductor gain stage? A third tube stage? I do not know…
Actually reticently, two s...
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[quote user="hagtech"] I didn't want to steal any of your ideas. [/quote] This is very bogus notion. If the 6E5P is somebody’s idea then would be not me but Dima’s as he discovered the tube “for Sound aplicatios” in 90s while he was fixing a TV. Howe...
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Hi Romy, Here is my dilemma. I like the SU1tremendously. Don't laugh....I had it hooked up to aRotel Michi RHQ-10 and the combo is sounds amazingwith my cartridges. I recently was feeling itchy and bought a Pass XONO.The Pass XONO cannot touch the so...
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The new sites announce that Parasound introduced John Curl designed Halo JC 3 Phono Preamplifier. It is passive EQ, three-position input impedance switch, DC coupled amp stages with FET followers. It reportedly has average noise ratio and unknown gai...
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[quote user="Romy the Cat"][/quote]This is a technical post.I've made some progress on my assault on the above version of EAR 834. After hard (mostly because of my idiocy) labouring through the soldering, I've creeped to the level where I can make so...
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I've spent two more nights examining and fighting my ham (I'm vegetarian and I want my phono to be so as well).1) I did Romy's excercise with shorting the stages via a 0.47u cap to GND. Shorting the plate of V2/grid of V3 resultedin the biggest reduc...
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Well, this sounds pretty much like consumer society as a whole, where the consumer is fed only what he pays for many times over, and marketers chase their own tails looking for the next hot item, or at least the next popular catch phrase with wh...
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[quote user="Romy the Cat"]The point that you have EU (240V version) is well taken.... [/quote]LX, I wonder if in context of dimmer and PurePower regenerators the voltage of a given country make any difference. PurePower is essentially a power amplif...
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Stephano Two good ears has put a post on his site about his new 4 way passive xover.I think this is a better direction than the digital xo. The designer, Thomas, designed also the preamp and I guess he has taken into consideration the input and ...
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Big header, small discussion...The well-designed hi-fi component will not require that a "ground" wire (if any) be connected, at all. In fact, the ground wire can actually introduce noise in some cases, for a number of reaso...
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