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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi Romy,What a busy year just gone! Finding enough time to just sit down and get the DSET's going has been impossible, but I have time now and have started the process.At the moment I am introducing some high voltage to the first amplifier chassis, ...
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Lamm introduces a new product, the LP1 Signature phonostage. Vladimir was planning to do it for a long time as his parley into “reference” series and after his from my point of view failure with LL2 phonostage.
The new LP1 Signature phonostage...
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I must say I've never came in to intimate contact with cables and avoid it untill I can, so yes all my arguments are theoretical.By amplifying I ment of course voltage, not power and ass-u-med that the external noise as well as the cable distortion a...
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Yesterday my machinist informed me that the End of Life Phonostage’s chassis will be reedy next week. So, I desisted update the power supplies of the thing replacing the FRED diodes with those no reverse/forward recovery Silicon Carbide Schottky diod...
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[quote user="Paul S"]Romy, I have noticed the same thing with the phono stage power supplies, that the big multi-chassis units with dual 100 lb. PS get no overall sonic advantage, all said and done. So how do we deal with the stupid, lousy AC that is...
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[quote user="Romy the Cat"]I do use some vintage elements in my playback but I use them purposefully. I recognize their strengths and weaknesses and I capitalize on the strengths only. I think this is the only sane approach I see; when some vintage ...
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In "High End" today we can see nearly every possible Design and obviously it seems that we find for EVERYTHING a fanatical Fangroup.Be it Tonearms made of Wood, or Plastic (of course it has a different, more important sounding name), multi speaker ch...
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I have huge AMCC800A cores for two such transformersand good winders with HV experience. I also have a lot ofquiality coax cable, good to few kV for the chassis hook-up.Again, if somebody is willing to take care of that, I can lend.I'm myself 3000km ...
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How great it would be if there was some kind of "breakthrough" every so often, in order to make linear "progress" with the driver evaluations and speaker development! In fact, it is almost impossible to keep meaningful "controls" in place between eva...
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[quote user="KOTriode"]Ok, I will try to lower the primary impedance like you suggested, but it will be on the new 6C33C mono block amplifier that I am building. The custom made chassis will be finished by next week and I have the better components w...
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[quote user="KOTriode"]Ok, I just read your "Melquides Remote biasing". This technic can not be duplicate in my amp due to DC coupling, the C3G (I dont use 6E5P) driver stage basically adjust the 6C33C current in the output stage. Just for curiosity,...
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[quote user="son"]Hallo Romy, i'm interested with half triode at 6C33C , but im confuse how to set it,... Full Triode : pin 1&2 give 6,3v , pin 6&7 give 6,3v.Half Triode : series pin 2&6 1&7 give 12,6v or just use pin 1&2 give 6,3...
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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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Hello Romy
This is my first post. Did you take courses in electronics and mechanical engineering or have you learned yourself outside of a structured environment? I am very interested to become proficient in working on/modifying my own electronics. ...
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Dear Romy,
The engineering basis for the K-LEVEL feature of the K-Stereo machine is described in Bob Katz's US Patent Number 7,076,071 "Process for enhancing the existing ambience, imaging, depth, clarity and spaciousness of sound recordings". ...
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Yep, you re right, the Yamamoto A-06S is SET, I did not read it carefully and I was under presumption that A-06S is PP monoblock. Good for Yamamoto! The only amps I heard with AD1 were PP. Somewhere in the very end 90s I shortly was exposed to i...
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It is confusing, but the NEUTRAL is not only "referenced to ground", but in properly-designed components it is THE reference to ground. Too bad most commercial hi-fi gear splits any and all grounding, at any point in any circuit, between the ne...
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Romy notes:[quote]The Lamm ML3 with it’s (looks like) composite driver stage might most likly to pump a lot of current and it would be so rational to put in there a second GM70 on the same chassis with own transformer, driving it from the same driver...
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[quote user="ricksmet"]PurePower, www.purepoweraps.com, just updated their site and have some interesting videos on the new PurePower+ products.[/quote]Yes, thanks, ricksmet, it does sound “updated”. I am not sure that the better box shall have as mu...
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[quote user="thegooddoctor"]This looks to be extremely well made with the recharging, battery, and regeneration portions separated into three discrete chassis with industrial-type umbilicals/connectors between each. I have seen such a configurati...
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My main 6 speakers are modified Edgar horns with 105 dB/ watt sensitivity, and the others are overhead emotive speakers with standard 90 dB/ watt sensitivity. There are two JL self powered f12 subs, and 4 self built subs with a sherbourn five channel...
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Hi Romy,Minor question with hopefully a simple answer.In the DSET schematic you have a 12.1k resistor in the bias for channels B, C, D and F. I have some nice 12k resistors here (not 12.1k) that I could use in those positions...can you see a problem...
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Jarek, I don't have as much time to look for stuff as it might seem like. If naked Cu is not available, directly applied (no intermediary metal) Au has been my next (reluctant) choice, in terms of sound. I've gotten China stuff, too, some OK and so...
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I think you'll have trouble adding a copper sleeve to the power tube. The thermal coefficient of expansion for copper is probably much greater than that of the glass used. Hence, the copper will enlarge much faster and break the glass.&nb...
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Not necessarily. Collect the large parts that you will be using (Power Transformers, Output Transformer, Plate Choke(s), Plate capacitors, etc.) put them all together on a table and try to visualize how you would like your amp to look like preserving...
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My Dear friend Romy,Indeed it took me a very long time to decide upon regulate or not. I ended up with regulation option to save some chassis space and weight, otherwise I would need at least 10 kilos more and 30% bigger space that would make the who...
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With 6C33C output run at 40W plate dissipation, this amp run much hotter than an 845 amp with output tube running at 100W. I measured the hottest point on the bulb and it is about 380F. I guess the due to short bottle , the heat spread on the ch...
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The transformer in this preamp was given from a friend who want to learn how to wind transformer. If I remember correctly it started out as UBT, they were bought (when UBT was operating in the Silicon Valley) at the company swap meet. They were rejec...
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I find it quite ugly, and who knows about the sound, but maybe another company has a similar product you could listen to...
MC-3 Music Center
2006.12 produce
Combining high quality CD player, tuner, dedicated i-PO...
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If you can do it, try isolating both cases/chasses from your "ground plane(s)". Use one inclusive "ground plane" for both the PS and the gain/RIAA sections, and ground this "ground plane" to the house "neutral" wire. Do NOT connect any shielding to t...
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