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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I would like to offers some thoughts about possible avenues for Pure Power 2000 improvements. Those thoughts are no specific to the recent November-December events and have broader generic implication. I initially intended to write it to Pure Po...
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[quote user="PurePower"] In the world or audio you learn new and interesting facts every day. AC caps (ceramic, electrolytic, polyester and polypropylene metallized foil types) can buzz at various frequencies. This is not nonsense, and is quite...
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[quote user="morricab"] Interesting test you have conducted. Were the responses mostly unflat near the frequency extremes or was there variations even in the midrange? The reason I ask is because if you look at most of the published curve...
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I spent a bigger part of day today to finish the “End of Life" Phonostage, there were many things to do but it is now over. Done! Complete! Amen! I it closed up and sat in it’s permanent place.
A few observations looking back. First, I spent a LOT...
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And The first thing I did was I grabbed the multimeter and started measuring what JJ suggested. I think we're on the trail of "something". I discharged all the capacitors in the amplifier and with the amplifier turned off, when I put the red tip ...
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[quote user="hoan da ox"]Hello to all, After following the comments of Romy for some time (have learned a lot, thank you), I would like to ask a question on this subject.This circuit is built with resistors, diodes and capacitors. Could someone elabo...
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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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[quote user="Romy the Cat"]My attitude with my main TU-X1 is “do not harm” as I pretty much have no complains of frustration to it’s sound and I would be pity to loose what I have now from this tuner. I have some people told me about specific mods bu...
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Wojtek, this is the whole astonishment of the story. There are no space flying technologies, no 30 years of research and investigation in a secretive lab which specialize on a submarine sonars, there's no capacitors made from unobtainium deelectr...
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Van den Hul released a new “interesting” phonostage: the Grail.
http://www.vandenhul.com/p_GA41.aspx
The apprentice of filtering caps certainly makes is very appearing but at this point it is not know the validity of the Van den H...
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Here are a few answers1. a, 84 Hz b, 4.8 inches square c, Hyperbolic exponential, T 0.8 1/2 Pi d, none so far on upper bass horn. S2 and 2405 have series capacitors feeding them. e, Eminence Kappa 12. 4. Both tweeter and S2 ca...
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[quote user="Paul S"]how many LCs does one need , given perfect, quiet AC to begin with?[/quote]Probably correct, considering the physical vibrations etc. that large capacitors can create. There may be the potential for added distortions. However, ...
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To my ears silver has a potential advantage over copper that unfortunately seems difficult to achieve. I've read that the advantage may come from the lower DC conductivity, and the problems from higher inductivity and skin effect, and lower internal ...
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I am getting a dedicated third amp to drive my upper bass channel and I just figured out that when I go with my midrange channel at the line level passive filter then I would need 0.0000302uF capacitor against the amp's input stage, that means… 30pF…...
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Romy,I used second tube grid resistor, 1.8Meg Holco. (I couldn't find 2 Meg chip and good quality resistor: Dell RN60D or Holco or even Caddock MK-132.)But I felt the deep bus was cut. I tried 1.8Meg Holco & Riken 220K in serial. The deep bus inc...
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Well, probably not up in smoke, but it is just not functional any more. I was away for a few days and came back to my room to find the Placette refusing to change volume or select a source input, so something is amiss. Perhaps something has been am...
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It is true that a given battery will have "special" requirements for optimal charging. Also, where the battery is in a circuit and the specific demands of use can influence how and/or how quickly it "wants to be charged", not to mention different ba...
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Here is a semi-final draft of 6-chennals Melquiades Power Supply. Since I use my site pretty much as a notebook would like to have the diagraph posted in this thread for my personal references.
http://www.RomyTheCat.com/PDF/6way_Melquiades_PS.pdf
A...
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[quote user="Romy the Cat"] I do some very interesting experiments with Rohde & Schwarz tuner. Dima and I have discovered a way to use the Schwarz without the wide bandwidth amplifier, driving the Multiplex Decoder from the Schwarz’s preamps. Bas...
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I appreciated a couple of things, probably for different reasons than Q put them forward, I think. For one thing, I more or less discount his timelines, and also the idea that certain audio components reached a high-water mark as "complete" achievem...
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[quote user="clarkjohnsen"] The sales guy was insisted about the super-isolation quality of adeptResponse but it is all BS, he did not understand what he was talking about. You are arguing that the unit can't be much good because the sales guy was ta...
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[quote user="Antonio J."] - Regarding C2 the 2000uF/450v cap, he suggests to replace it with 5 x 200uF/200V by Mundorf (he can get them for a good price, probably better those five caps than a single 2000/450). I'm not sure about this replacement, it...
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scooter,
actually this is something what I am planning to do: to have a few selected items that I will moive myself in my car and then let the rest to be move in by movers. The place is not far from Back Bay. It is West Woburn, right equidista...
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yep-- i always measure first to get as close as i can get to a matched set (within a % or 2 at least!). luckily, for this application, i got 4 extras.. so i should be able to get close, and for all the sub- 1uF caps i have around for all the ot...
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[quote user="Romy the Cat"] I have a feeling that if I have extra 6dB of gain and 4 times more power then I might be able to deal with new room. Sure, the only measurement in location would show. What I know is that I VERY much willing to preserve my...
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I kind of thinking about it and I am not sure that I have an opinion. In the former PP2000 I stunted buttery with over 100K capacitors, presuming that it will driver DCR of buttery lower and therefore improve the day-to-day decoupling of PP2000 from ...
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[quote user="Romy the Cat"]Good link, Kris. What is missing in the link is the RL filters. The RC Low-pass filters are fine as the capacitors are not in the band-pass mode. It is arguable what would be better – a subtractive shunting cap or a few mi...
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@
montesquieu yes , the informations are from Silvio , this is the full text ??
Some
technical information regarding the different versions o...
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[quote user="peter foster"] By "dynamic viscosity" do you mean the reluctance of an amplifier to be dynamic, i.e., the degree to which an amplifier sounds like it is bogged down, usually as a result of a poor rise time on transients, i.e., poor HF re...
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I do not think Genn is close to an answer, he spent too much time to read the Lehnitsky’s brain-massage that made him to feel this way.
I am sure that there are some kinds of very pragmatic, predicable and manageable explanations for the effect that...
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