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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Experimenting with Decca carts, I've temporaly disconected the SUT's and decided to check the RIAA calibrationand I think I have some (circuit?) problem.[quote user="Romy the Cat"]
In the end of everything I was able to get very nice response. The...
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[quote user="haralanov"] According to a friend of mine, who has a lot of experience with GM70, this tube starts to sing only with (very high quality) interstage transformer coupling. He told me that when it is used with coupling capacitor (as is the ...
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Measet, I will try to find a photo and the schematic as you requested, but it may be a while before I can locate them. Plus, we are still digging out from Hurricane Irma down here. As I recall, I beefed up the raw D.C. supply and then used an LM317 r...
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I am finishing us to setup my listening room and I have my PP2000 blowing up sometimes (go to protection bypass mode) when I use powerful SS amp for ULF along with Melquiades and the rest of the systems driver from one single PP2000. So, I guess I wo...
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Interesting,
Turned today my playback - the fist time after a week of break. What a miserable sound!!! I will keep it running all weekend and I hope it will be better tomorrow. In the posts above we blame capacitors in the phenomena but I wond...
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Look at the solution in a different manner.Regeneration will typically not be able to service large power transients thus, they are best suited to SET, i.e. constant current systems. Similarly any control loop cycling will usually be heard...
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This is classical common mode noise interference on a common supply. This type of noise will pass right through any power conversion technology and in both directions. Due to the timing variations, I would expect it to be a little bit of mains inte...
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[quote user="Romy the Cat"]Well, the StormTank is currently is being sold for $30K.[/quote]Oh well, I can forget about buying one to try it out...[quote user="Romy the Cat"]The PurePower has a bank of caps that shunt the battery. Intellectually, it
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Hi Paul,The net gauge for one cable of the 140 strands of #40 stuff is #15 AWG, as far as circular mils of area vs current induced heating goes. The surface area is some 13 times that of a solid #15 gauge copper wire. A minimum of 10 times the surfac...
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Romy, thanks, as usual, you seem to have been right. The system is on and I just checked V2 voltage; its way off, above .4VDC, so I grabbed a hot pad from the kitchen and rocked the V2 tube. The socket made the familiar a dry creaking sound and see...
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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 normal behav...
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[quote user="Romy the Cat"]IIs it possible that the methods of sinusoid construction are mater – so where is the causality? [/quote]There are at least two possibilities:
1. The perfect sinusoid unmasks the compensation of the system for imperfect po...
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Jam,Yes, as I now see, you are right that the bearing was merely filled to the rim with oil and that it doesn’t have a pump feature (like some older turntable bearings did). And yes, the lead is touted for anti-seize (mostly copper these days), but a...
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I would say that there are advancements where you would get far more unanimity on the progress that had been made than one would do for audio after the development of tape. I don't think anyone would want to go back to cylinders. So there are advance...
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It was a bit tricky to make it works. The Schwarz original crystal is imposable to get and the new one that I got from ICMC had different internal capacitance, so I was forced to shut them with additional inductance to let the oscillators to fire up ...
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[quote user="Thorsten"]If you do, do seek out old Air dielectric AM tuning Capacitors. You only need 110pF & 330pF, both can be found suitably. Once you tuned the RIAA to perfection simply superglue the shaft in.... I used to use that trick in pr...
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I've run into that yucky place where words get in the way of ideas.The mastership is what i'm after. My problem has always been the electronic side of it. I bet i could design a driver that would get me as far as a driver could, but i'm always swimmi...
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You would not have ‘limitations imposed by of a pair of SET amps such as the ML2s”. ML2 would do fine, juts make sure that it would be older ML2 before 2001-2002 production. You try the Melqs then, the parts are not a problem at all. Everything is ve...
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You had mentioned the dry cells before but I was unaware of them.I went with the LiFePo the fellow recommended. I had ordered it before you posted this.The key is depth of discharge and I am not sure if they are specifying this. All of their specif...
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Okay, today I hooked it up and have spend some time listening. The change in my system was very dramatic and positive. First of all, it seems suddenly like a good electricity day. The noise floor dropped out. The timbre of the music and the body ...
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What an incredibly cool result!!! I retrofitted the Rohde & Schwarz decoder with a few changes and it throw a very very very nice sound, in fact even better then I predicated. The Decoder has a SS single-end out stage (not PP) with a high-heated ...
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I am not sure who those people are. It might be Arthur Loesch or someone who cashes out on Arthur Loesch… it might be whoever and I have no idea about the credibility and seriousness of those people. I heard Arthur Loesch does not do Audio anymore, s...
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Here is another advantage of multisampling and DSET in particularly. There are many moments in amp that in one or another degree affects transients.The capacitive coupling for instance works fine but as long the amp sits in class A1. As soon amp hit ...
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[quote user="Dominic"] I've run into that yucky place where words get in the way of ideas. The mastership is what i'm after. [/quote]
Yes, it is the yucky place where words get in the way of ideas. I did not use “mastership” in term of skills or cra...
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[quote user="Romy the Cat"]So, you feel that high voltage filedcoil do excite the electromagnets driver somehow?[/quote]I will not call this exitation, let say it dynamic stability.[quote user="Romy the Cat"]What voltage you feel is appropriate?[/quo...
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In your earlier piece about how to use the S2 'properly' you wrote"Whatever happens between the 400 and 2,5 is pretty much unnecessary for you garbage. So, get any known to you soft capacitor of 3uF and place it in series with the S2 driver. This wil...
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I do not know. People say a lot of words about jitter and speculate a lot about the topic. I never heard from anyone any real definition how a high level of jitter sounds in realty. I heard 4 (!!!!) complete contradictory descriptions how high level ...
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[quote user="N-set"]… I think that there is something more interesting going on here: what you have hereis rather a rare instance of an intelligent bypassing… [/quote]
Yes, it is highly intelligent and looks like it is highly effective sonically. It...
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[quote user="steverino"]Well, the circle is unbroken. Romy started his audio journey in a basement somewhere tinkering with this and that. He rose for a time into the light and now has descended once more. However this time it is called the Bunker. W...
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peter wrote: 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 response, or a tu...
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