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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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How strange... I was thinking about this, and discussing it during lunch @ the lab a couple days ago... Got there from a totaly different direction though, was thinking about harmonic vibration dampers used on crankshafts, (usua...
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Ok, here is another subject. I feel that I kind of screw it up as I did not foresee it in my planning. What I need is to add some decupling devised to my horn in the location where it will be mounted to the surface of the house frame. The horn will ...
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[quote user="unicon"] Roman, It is interesting to see you using your pipe in room.You mentioned its wrong to use them as LF consumer. You got it somehow wrong1-sealed tube traps can absorb LF and yet again absorb all HF in the same time...2- the ...
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For vibration control coming from multiple powerful indictors I feel there is nothing better then the “wing strategy” that invented for 6-ch Melquiades. Sine I have all transforms and chokes in toroid shape I put them on L-brackets and lifted them up...
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It seems reasonable to begin with the science -- as a preliminary to listening -- but I do not follow the logic here. The source of the vibration is principally the floor: the table should therefore not be coupled with spikes but decoupled from the f...
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[quote user="Romy the Cat"]I am personally inclined toward the BC scenarios.[/quote]C allows for manipulation of the Platter 1 bearing with different belt tension in a linear fashion that includes a potential nadir in friction. B will hold the ...
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[quote user="decoud"]For sand to work here in friction does it not have to be load bearing itself: i.e. inside a steel cage that propagates the vibration through the walls there will not be much friction, no? What you want is a sandcastle.....[/quote...
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It's finally ass-embled! All in all I'm quite pleased, but I have to live with this mastodont in my room for a while to get used to it.Now I move to listening and repeat some measurements.The insert is on it's own independent pneumatic suspension:and...
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[quote user="Romy the Cat"]What attracts me to the TW TT is the idea that it is possible to discard anything that we might consider important but to make the platter as a sandwich what the bottom of the platter care bearing but the top of the platter...
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Hi Anthony Agree, waste is waste. The bigger the better. If you care bout sound too, i recommend the RG213 radio cable. Its perfect for that purpose. First, its coaxial which eliminates the inductance. Second its very hard so that during vibration th...
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Time Allignment has nothing to do with the placement of instruments in an orchestra. Did anyone wonder why a violin playing 2nd space A sounds different that a trumpet playing the same pitch? In physics, when a string or air column in excited into ...
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Paul, I thought about the wall mount, but eventually decided to go with a more universal, pref. end of life solution, I could place anywhere. I've never had a dedidcated rack, a time to have one.The result is a slate-on-steel-frame 500kg mastodont, I...
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[quote user="AOK_Farmer"]Do you think you would lose the ability to hear stereo properly and that for the Van Gogh type person Mono is as sufficient as stereo? [/quote] Absolutely, a person with one ear do not need stereo. You can easily try it by co...
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Looking at the better photos, with a rear view of the LF speaker, the "felt-covered large port" is actually not the worst possibility (a quasi "IB"), depending on some things we can't see and how well that driver "likes" it. I can also see that what...
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Romy wrote:"...I usually suggest to set your new 6C33C tube for operation of 250mA-270mA, use it for a while and only then set 300mA..."This is what I did; in fact, I've had to leave them set at 250mA so that during warm up they don't go over 310mA. ...
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Romy, thanks for the explanation.
I was not sure if you still kept an eye on that thread Romy. As far as I know you need to be logged in to view the images in the diy threads so I will post a couple here to show where...
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I ran across this Negative stiffness isolation platform (the anti Viagra??) independently but I should have known the Cat had pounced years earlier. It is hard to tell how much the concept has advanced since 2007 as I only found one firm doing it (Mi...
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Since I am now in the Super Zarathustra conceptualization mode am paying attention to the hybrids out there.
http://www.goodsoundclub.com/TreeItem.aspx?postID=2362
I still do not see any interesting Class “A” hybrids but it looks like regular AB hy...
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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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N-Set, why would you disconnect from the house neutral, unless you are using battery power??? This "neutral" is the "ground" leg of your circuit! The house neutral wire is typically white, and the house ground wire is typically green. The "extra", g...
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About vibration, there is this technology championed by AR9 a few years back and now seems to be everywhere. Opposing woofers, the force cancelling technology says the movement of one driver gets cancelled by the movement of the other and no vibrat...
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Well. That dude down my street in the esoteric shop would say "i feel negative vibration is in the air here"...Though "only positive counts" may sound very positive in the first place, it rather seems to be used for discrediting majority of opinions....
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[quote user="Michaelz"]Where does this come from? [/quote]It coming from a danger that we all under what we think about those things. With all our desire to equate loudspeaker with a musical instrument this comparing might be juts figurative as a mus...
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Paul, I can olny speak within my context and with no audio tests, only knuckling.I use pure silca sand in 3 granulations (2 of them fine unfortunately), mixed with steel shots.Of course the sand is there to quench the steel ringing. But while achievi...
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Modern automotive sound damping is typically focused on "shaping" a targeted range of frequencies, based on how engineers want the cabin to sound and feel to the driver and passengers. No reason why audio damping should not also be targeted, for the...
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[quote user="guy sergeant"]Are this company thinking along the same 'Oops' lines?http://www.layeredsound.com/index.html[/quote]I have some experience with the 'Layered Sound' concept and although I haven't read all of this thread, I think that it doe...
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http://www.cascadeaudio.com/marine/vb_1x_damping_compound.htm After reading the tech notes on VB-1X, I have difficulty with the manufacturer's claim that the product is effective at damping frequencies down to 10Hz, when at the same time they specify...
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[quote user="floobydust"]I do agree that the internal structure makes a big difference... but, if the tube specs properly and has adequate immunity to mechanical induced interference, then you should not be able to discern any major difference in sou...
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[quote user="Romy the Cat"][quote user="drdna"]As I had been looking at all these tubes I began to also inspect their interior construction. This will amuse you: one thing I would do is to hold the tube right up to my ear so the glass would be touchi...
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[quote user="PurePower"] You point out that if a capacitor can hum it is faulty and wound improperly.
You are absolutely correct - the way a capacitor is wound will determine if it can hum or not. Unfortunately almost all capacitors on the m...
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