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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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newbie here but this interests me as i have the baby raven one. the platter of the ac is hollowed out and filled with a gel and then topped with the copper "mat". why is this important? because vibrations exists is 2 forms, s-w...
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[quote user="Romy the Cat"]fiogf49gjkf0d1) 3) The common mode filter you have at the PS’s input- why do you use them? They do eat some dynamics. As many time I removed them from all imaginary components as many time I witnessed better sound. ...
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I recorded the output of my cartridge/ phono stage/ line stage with the stylus resting in a groove of a stationary record while playing a CD at high volume with heavy bass through another path. Since my system uses tubes I was also getting tube micro...
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The most terryfying thing is that the war was still possible in Europe...and this kind of war with heavy indiscriminative shellings...Yes Pieter needs time, but I haven't been pushing too much. We have bought silver wire so it sits there and waits. I...
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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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[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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Referring back to "retro-fitted", under-floor shoring in finished rooms, such as basements, I forgot to mention something I have run into a few times, in "traffic areas". This is the disintegration of the drywall ceiling board that almost invari...
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The problem of most solutions in high end audio is "one step forward, two steps back". Personally I prefer to hear all information/dynamics of sound even if the sound is out of control.when I use Isolation Transformer, AC filters (both parallel and ...
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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="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 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="decoud"]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...
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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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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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After spending considerable amount on the hum problem, one way to fix it is tho remove transformer and place it in a different chassis, the noise level will improve more than 15 db to -74db. But that cause too much hassle, so I got it improved to 62d...
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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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[quote user="jessie.dazzle"]
I just poked around on eBay and it seems the 6c33C-B tubes are not so easy to find. There are however plenty of the model 6S33S-V. My understanding is that this is supposed to be a more durable version, intended to...
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Hello Haralanov,That's a nice strong heavy box you have there.You might want to check and add some more sand in the future because vibration helps the grains to adjust which in turn reduces volume.[quote user="Romy the Cat"]10) Do you know that you...
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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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Romy,You maybe thinking of your a/c problem backwards.
In use, air conditioning vents become louder as the air speed and turbulence increase. Reducing the aperture of a vent can increase noise because a reduced aperture increases air flow spee...
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[quote user="joaco"]
bernie_f wrote:fresh powder snow in the countryside? The zillions of crystals of water are doing a perfect job of damping noise - at least in the audible spectrum.but the point is that there are so many variables out there tha...
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We should define some borders here; LF, when you have an UBH, should be from around 100 hz down to 30 hz, where the last fundamental tone of an instrument is played. ULF should be under 25-20hz.I would say that a driver playing 25-30 hz should...
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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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Maybe make a manifold and mount drivers vertically in push pull. No sagging, much less vibration. But I would not use fiberglass insulation behind the bass channel and remove any existing fiberglass in that area, replace with cotton/denim insulat...
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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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[quote user="Romy the Cat"]Well, wait what you put properly working
PurePower generator on your dedicated line... My estimation that a dedicated
line gives 25-30% of benefits that comes from good electricity.[/quote]This is very encouraging as the ...
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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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So here is the promissed picture of yet unfinished rack:It's huge (the columns are 10x10cm) but still quite elegant-looking in my room. The electronics rack on the rightwill be put inside the TT rack when I finish working on it. It's all thick (4-5m...
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