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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Paul S"]Joaco, all this will probably be moved back to the "Electricity" thread, which is not really an APS Forum, as it has appeared for a while, now.
Paul[/quote]Yes , I made a mistake ... it will be much better in the Electricity thr...
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Hi, gravetones
I asked myself the same question many time and even bought a few years back one of the APC on-line power supply. It is unquestionable that PurePower is an adaptation of a regular commercial on-line power regenerator and all that...
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[quote user="de charlus"]Due to this thread, I called the friend upon whose boat I heard the Vox Olympian in order to find out precisely which DCS DAC he was using with his TLOX to get the sound that I found so remarkable. It turns out that whilst th...
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DA, looks like very nice and lucid assembly. How do you like the sound of the thing? The output stage 200mA /187V. It is a bit too small but I will do. I do not know what the gap you have in your OPT. If it is limited to 200mA then stay there, you ...
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Yes, Jim, you put it very well. Still in case of the 6C33C it only possible to cool the glass and I made experiments blowing a strong flow to the glass and it did cool down the plates. The problem is that it is not a good idea to apply a strong flow ...
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The references to inertia and lightness are not to do with how a DHT works electrically but to do with how sounds reproduced by them 'can' be ie without smearing or overhang. Its a characteristic I hear in live unamplified music and one that is endea...
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Hi Romy,
I did the review on the AcousticPlan amp, called the "Santor". It is indeed a two-stage amp using 4 6922 tubes in parallel to drive a high Bias Mosfet output stage (it is class A to approximately 15 watts and runs very hot). It ...
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Thank you Clark for your comment.Unfortunately, I think that you missed the point. It is possible that a power cord can change things. The description „better“ is a moving target however. Let us take for example a „full range“ driver in a backloaded ...
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[quote user="Anonymous Gilles"]I am not fgrustrated but trying to gather information before making a decision. I sen you an email from france and I own electrovoice patricians in a large room, about 100 square metres my question is is your amp real b...
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So as an example let me present here Paul's analysis of my EMT930 (all the credits go to Paul R).
The objective of this particalr run was to test an apparent audiopedophile(tm) legend that a 78rpmwarmup or preforming of an idler deck helps to smooth...
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[quote user="Romy the Cat"]Because GM70 can work in A2 class the ML3 has a very powerful high current-capable second stage (I do not know it they are 4 parallel 6H30 of some kind of composite follower) to be able to handle the GM70’s grid current.[/q...
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Wow! I did not realized that almost 4 months have passed since I wrote last.
Quite a few things have happened the last 4 months that I have played with the 6C33Camp/preamp combo. I have tried at least 3 different vendors on the Ulyanovsk type, the ...
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Romy,
I've been storing all my digital music on a computer located fairly far
from the audio system for quite some time now. You've brought up a few
issues that are worth discussing.
1) Storing the digital stream - I assume you mean either (...
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While I would agree that modern construction should be much more robust than that of 5-6 decades ago, actual machining and manufacturing costs today are significantly higher than they were back then and there is much less of it going on. Look a...
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This is very ugly topic as I have been looking a solution for years and I do not have a consensus with myself regarding this. I have 21 AC power consumers in my playback. Well, the 21 that require good power, another 8 might be plugged to the utility...
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Alas, no time for anything at the moment, the listening valuation must await construction of the amps (and speakers...)Also, it is a very custom application - it is designed to drive an array of ribbon tweeters. Normally these have matching transform...
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I talked for a couple of hours today with a local Solar Power technician, I sort of told him all the gear I have that would need to run on batteries and we got a shaky number; from that number he started calculating a bunch of panels and batteries a...
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[quote user="Romy the Cat"]The servers generate noise at more or less constant amplitude and spectra. So, why do not read the noise and inject into the space with servers a contra- noise at opposite phase? This sort of active noise cancelation system...
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[quote user="Romy the Cat"]
A 6moon-level company from Connecticut - Red Wine has own solution – to power from low-voltage DCSo, they claim that their buttery might release current being charged at the same time and it will not have any impact to s...
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[quote user="beachbum"]Did so cause i was still using my BPT for everything but my amps. I had a hum and high pitch buzz from my speakers. Replacing the power cord feeding my amps was the cure.[/quote]There was some mild 60 cycle hum which was elimin...
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[quote user="drdna"]After many unanswered e-mails, I got word from APS today, who said they have had a few customers with similar issues and that it seems to be system dependent. However, they also said that they were working on a way to fix this tha...
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[quote user="morricab"] You are also right that to get everything you want from an output transformer requires a VERY expensive construction and top materials. However; even an expensive transformer is no guarantee of success. [/quote]
Sorry t...
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Paul, 6E5P may strech very much, but maybe just enough to close the gap. In such a racing car there is a little margin, it's not a usual 10W+ design. Biased at -3.5V 6E5P will produce +40Vmax on the grid, driver driven to the limitThe grid will eat ...
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Well, I have little comparative experience of this cos the required chokes get huge and expensive, but some people I trust swear by low DC resistance chokes; they feel that this parameter is so important that they will sacrifice inductance to achieve...
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Allo,Well, the divider may certainly be responsible for some softening of transients - in particualr, what values are you using there?Also, the received wisdom is that silver micas are created far from equal; no experience with them myself but I beli...
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Well, without any theory or gut feeling to guide us, we are flailing around. So let me tell you what my instincts tell me and you can take it or leave it.I think the main advantage of the EM is reducing flux modulation. There was a post recently by o...
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[quote user="Romy the Cat"]I always was “concerned” about those large high voltage triodes: 211, 845, GM70…. They kind of different… The 845 always was brutal and not elegant, 210 was elegant but not sophisticated, and the GM70 was sophisticate...
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What do you mean by 'sonic verdure'? Do you mean virtues?
If so I would say that they typically offer a lighter, unfettered presentation of timbre & dynamic range across the full frequency range provided that the HT and LT supplies allow them to....
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[quote user="Paul S"]Although "consistent" AC might be something equipment designers could allow for, I think the problems we are dealing with are both myriad and systemic, and we are probably stuck with these problems or some other systemic issues, ...
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Adrian, Fair enough... it's not about power or gain in your case, just making it sound as clean as possible. Well, if you go back to my earlier post on findings, I list the basic operating values. Just to recap them here:Plate supply ...
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