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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I am having a LOT of microphonic trouble with the 7788s in a high gain stage. I run a 40mV input signal into a 7788 triode at 15mA CCS. Plenty of gain, nicel output. But dang, if I bump the tube or board or chassis, the grids inside...
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and I hope it will be up to the level … of FM in term of enjoyments. Anyhow, the phonostage is the already pack up in the chassis and running. I dropped the B+ supply to 270V and the R1 restore to 120K, keeping the 100V on the first plate. I can’t wa...
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There is a Restaurant at the border of the Universe. Well, it is not really a Restaurant, it is awful, stinky and oily hut where you can get only one meal whatever they call lunch with dark, glibber Peppermint Sauce. Always the same. Day for Day. And...
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I'm strugling with dreaded Mcintosh Mr67 tuner . I borrowed one from a friend and it was very nice ;clear , crisp , dynamic so I went out and bought one for myself . It sounds like a mud and matches 100% of your description of average tube tuner...
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I have recently been thinking about efficiency. Apart from enabling you to use low power amps, is there really any reason why high efficiency is better than low or medium efficiency, all else being equal (and I know perfectly well it never is, but le...
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In my view the leather as a suspension material is absolutely spectacular and this is because it's mechanical impedance is very close to that of the cone (of course made of fine paper) and there is no energy reflected from the surround back to the vo...
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...is a pita, no, no, PITA! In my circumstances I've had so farreasonable results using foamed natural rubber to mechanicalydamp the chassis. Has anyone tried that ridiculously expensivesilicone gel tape/chips?As for the multiple shields on MC's. Hig...
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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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Romy,I hate it when I realise I need a different transformer...The following is not an ideal solution because it breaks one of the Melquiades design features, but may be worth trying - cathode bias on the output stage? You could burn up some vol...
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I wrote, "When you have knowledge about chassis and their pricing..."when you have no knowledge, then nothing is an indicator of quality in drivers anymore etc. Or when you are a buddy from a manufacturer or even worse, a writer.And what I meant is n...
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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 waiting to get installle...
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N-set, clearly you have a much better understanding of electrical engineering than I do (as do most of my pets...)! Still, I am hardly terrified by tank circuits, just wary of inter-component/PS/signal mosh. And I really don't care what sort of div...
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Jarek,I would start at the beginning. Turn off and unplug the TT motor, remove the phono cable from the phonostage and use shorting plugs to short the inputs. This takes the TT/cart/arm/cable is out of the equation. Do you still have the humm? If...
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Interesting, I had a prolong conversation last night with Kevin Tellekamp of the Silent Running Audio and we discussed my case. He proposed that the reason why my imaging was changed was due to the Super Melq’s powers supply in my nest stand do not s...
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LX wrote:"...Lifting ground is OK for a simple test but I do not want to operate like this..."With ground lifted, why not simply run a single-conductor cable from the PP's system ground (or chassis) so that it makes electrical contact with one of...
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[quote user="Paul S"]Romy, doesn't Tim de P also use this cool Miller capacitance idea in his never-mentioned "high end" tubed corrector? Also, do I remember reading that he runs both channels through the two halves of the same twin-triod...
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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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Paul S wrote :
"...my wife would shoot me if she knew I was thinking of using the art as room treatment..."
My "wife" (we are not actually married) is an artist... A while ago I had the idea to stuff the chassis of her paintings from the rear s...
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Got today a December 2010 PS Audio Newsletter with an announcement from Paul McGowan:
“…So, in January 2011, we will release one of our secret projects that have been in the works for two years now, the PerfectWave P5 and P10 Power Plant...
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[quote user="drdna"] I am quite sure it is a ground issue, as it is noise coming from the loudspeakers regardless of source or volume. Lifting the grounds on the amplifiers… eliminates the problem. [/quote] If it so them there is no need to contact t...
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[quote user="Romy the Cat"]From what you describe I conclude that you have ground loops regardless of the PPs and the PP juts highlights the problem.[/quote]This may well be the case. I can't even remember the exact components I was using last year (...
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[quote user="decoud"]I am getting the components together for the full range version, and I was wondering if you would be kind enough to consider making available the drawings and the manufacturer for the enclosure. I rather like your design, a...
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Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor. I have another tri...
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Adrian, the neutral leg is "the" ground for any American AC-powered electrical device. The "ground" leg is +/- redundant, depending on the way the ground (or grounds) of the device in question is (are) configured. With some...
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In my case, I have not observed any fluctuations in sound quality other than those resulting from my own state of fatigue (maybe they are doing something right with power generation/distribution over here... I don't see many complaints coming from ou...
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I am with you on this one. I am also very suspicious of gigantic, 4-chassis phono stages if only because I just wonder why the need for all those damn noisy parts, along with concommitment connections?So it really pisses me off to admit that th...
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[quote user="starboy"]I would have left this alone but the facts and truth will out...
1) The Mantis was well known to me and others around me before Andre joined V.E. though maybe not to you Americans.
2) There are possibly 2 owners other than mys...
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There are a few manufacturers out there, Minus-K, Halcyonics, Vibraplane...The Vibraplane is a good unit for the money, I have no problems with it and it does the job the way it should.Those Vibration units work different from construction and are ve...
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I think when we are taking about the today TT we do not mean inventions – there are no inventions that I see in mega-priced turntables. All that I see are small manufactures, very inefficient production, very little market for sale and distribution a...
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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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