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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The strangest (and most disappointing) thing I noticed is that this "review" is so threadbare that it pretty much boils down to a "testimonial". Could he have taken an easier path? Surely, along with calling the 2.2 "a worthy successor to the 2.0 a...
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I’m not convinced at this point that it is good – I need to see it more in context of everything else - but the initial results are very promising. What I do now, I keep the compression Fane 8M in horn but I very dramatically increase dumping of it...
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Yes, 10 uF is rather large for a coupler, alright, but not unheard of. Conversely, .47uF would be on the small side for a "powerful" amp using the 6C33C out (4.7 uF might be more like it...). My own phono stage uses 5 uF film couplers. One would supp...
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[quote user="Jorge"]If you put the Melqualdes in the basement you can put a smoke detector very close and maybe a camera and a monitor to keep an eye on them.NOw you cold also make a statement piece and put some sort of medieval looking cages around...
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[quote user="cv"]I presume this is with the new production diaphragms? Just wondering if the old ones might restore some of the youthfullness which was diminshed by the field coil?[/quote]Yes, if was the new production diaphragms with plastic suspens...
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I detected that the Water Drop tweeter has VERY interesting ability to react to the stage of out stage. I am driving the Water Drop with a full range Melquiades SET. As you know the full-rage Milq use a moderate Lindale transformer with a juts 200mA ...
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[quote
user="S.yorke"]Dear Romy,What would be your suggestion on the
operating point and OPT impendance if I were to drive a single driver Back
loaded horn speaker with over 102db/W? Knowing that you have mentioned a range
of operating points in ...
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Those both look fine, but all your voltages are hot...all of them. From afar it seems as though the primaries are not correct for the mains supply by about 15% eg. wound for 200V primary but you have 230V, or something like that. Where I am has nom...
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[quote user="Romy the Cat"]
Reading at my site Paul’s narrative about his fight with ML2’s tube and the ML2’s tube sockets I need to confess that I always was suspecting that he is some kind of odd wacko with bizarre and sick approach to the subject...
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KOT, I do not know the sound or character of that driver, at all, but I do think of the 6C33C as "vodka", since it is "tasteless", but it has some "kick". So, what have you mixed to flavor your vodka, and why did you settle on that driver?As for goo...
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[quote user="son"]Its very clear right know,so i decide to build with 12,6v in series….[/quote] Son, when I proposed the series configuration I thought that you have already have an amp and would like to convert it to single plate configuration. Howe...
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Yup i think i will use ac for filament,in my mind i wan't to copy and build the structure of melquiades ,so i don't need to recalculate anythink,only follow the stream, but maybe if i use 6,3v filament(i see melquiades use 12,6v) i must change someth...
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I have noticed the same kind of control and "density" of sound from KR audio amps, which are zero feedback. Have you tried this brand of amp? The one thing that I can tell conclusively about the two different amps is that neither one suff...
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Hi Romy,
I just want to add my experience I had last year with a transformer based (actually it was an autoformer based) "passive" preamp. I thought that this could be the final solution in my preamp quest. Alas, it was not the case.&nbs...
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Hi Romy,I do believe that you can benefit from the study of making violins. It is one of the few instruments that are essentially "finished" in development. They have an essentially perfect string length for the played frequencies, the body size and ...
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N-Set, I don't know about the 6C33C for tying directly to a load like that, if only because of its propensity to drift all over the place. My own limited experience with this tube suggests that there is indeed a "sweet spot", but I am pretty sure yo...
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If I try Trapped Horn then it will be ether 90” toll or 108” tool and as narrow as possible. I am not looking for “reverse engineer the tapped-horn and refold it in a different manner” but rather to somebody who know what they do to design the right ...
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Melquiades condition (both cathodes heated)Plate Voltage 220vBias Voltage -80v (-110v puts the working point in a ridiculous place on the curves I have)Plate current (according to the curves) 165mA approxPower Output 15.5 Watts2nd Harmonic ...
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[quote user="Paul S"] I think that bit of marketing hype must derive from Lamm's ML2 (& 2.1?) "Operating Manual", which says: [the ML2] "Maximum Output Voltage" "with continuous sine waves, at 1kHz @ rated line voltage" [is] "(blah, blah, blah), ...
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[quote user="drdna"] So, my thought was that below 35 hz, there are many ways of thinking about amplification. Some might say SS amplification is helpful due to power demands of horn loaded 18" woofers. To use 6C33 might be a trade off but I do not k...
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[quote user="ml8"]So sometimes i just wonder why do you need 6C33C at all, with your high-sensitive speakers.[/quote]Actually it would be VERY interesting to expend on it sometimes… Why the Supper Melquiades could not be juts one powerful 2-stafes LF...
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Thanks, floobydust.
There are a lot of interesting points in you post to consider. What speaker you drive with your 2A3? If they are relatively high sensitively (like compression drivers) then did you consider going with a single stage? I think I ha...
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Since I went single-stage Milq with output transformer on the Water Drop’s side I am witnessing an interesting phenomenon. When the amp is cold and juts tuned on then during the first 3-5 minutes (in addtion to the 2.5 minutes of start up procedures)...
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Nope, I am not a big friend of OTL amps generally… BTW, I have seen (did not heard) one Japanese amp that use 64 x 6C19P tubes. For whatever reasons Russians consider that 6C19P as very good sounding tube - the younger sister of 6C33C. It was not my ...
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Romy:I would suggest not to store tubes under the bench in an actively used sauna. While the temperature alone will not affect them, the combination of heat and saturated humidity may lead to corrosion of the pins. Also many bottles are held to bas...
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Wojtek, in reality all “problems” that you picked from Paul’s comments are purely inventions of his mind. ML2 is truly “turn and forget” type of amp and it requires no dancing or prying around it. The 6C33C requires some attention when it is new but ...
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[quote user="jessie.dazzle"]Since renewing all tubes in both ML2s, over the period of about 3-5 minutes, the V2 bias on one of the amps cylcles between .27 and .33VDC. Is this behavior indicitive of a defective 6C33C?[/quote] That is not good. Try to...
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[quote user="Romy the Cat"]Interesting. with sealed 280 sq feet and 8 drivers per side along a long wall you very much migh be able to use a singe 6C33C. With proper loading, good trasformer, DSET and these drivers you should be able to get bass that...
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Well two power supply's ready and one full range amp hooked up.Nothing blew up so that's good!1) output stage 200mA /187V2) driver stage 205v (test point A) and -4.3v bais3)setting 0.000v on input is ok but not stable,some DC drift4) bais lines are l...
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[quote user="Romy the Cat"]Make the full-range and then you will see where you are.
Still, I feel that for MF channels it is beneficial for do with a good DHT output
stage instead of 6C33C and perhaps it is a good idea to use DHT driver as well.
S...
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