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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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One more thing that I would like to point out in context of the recent Marc Mickelson’s review. Marc wrote:
“The Atma-Sphere amps are certainly more powerful than the ML3 Signatures, but not noticeably so unless you clip the Lamm amps. “
Here is wh...
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[quote user="floobydust"] The main component that limits low-frequency response in any SET is the OPT. For these initial designs, I used the smallest Hashimoto SE OPTs... their H-203S for the 2A3 and their H-507S for the 45 which are rated at 7...
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OK, here are my thoughts for today. Below is a very simplified schematic of Pure Power 2000 regenerator. I do not know if it is, but I think that it is how it works. I do not think that it is different from any other on-line generator. At the li...
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Dear Romy,
I have been reading the threads on GoodSoundClub about your journey with development of the Melquiades and Super Melquiades amplifiers. They are very interesting to me. I am pleased that your purpose was to produce a particula...
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[quote user="Romy the Cat"]This morning I was listening Messiaen’s Tarantella-Symphony powering system from the bare AC lines. It was far from the sound I would like to have and I decided one more time to insult myself with PP2000. This time I decide...
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How about some sort of composite? You need the strength of steel, these parts weigh a lot. But maybe a different approach. Maybe something like plywood glued to a sheet of aluminum? That would give you the solidity and conduct...
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It sounds like a lot of the circling has to do with which 2A3 "sounds better", outright. In any case, I'm guessing everyone would agree that it is specious to argue about which 2A3 sounds most like some internally-estab...
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I was searching for an answer why squire wave is so screwed and I was advised by the site’s visitors that it is due to HF restriction of my channel. My HF response does look too low to me – the 23kHz; with all my ultra low capacitance magnetic I ...
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Hi all ! [quote user="morricab"]
Hi Romy,
Could you explain a little more about the amp? If I understand you correctly it is a 1 tube stage with solid state (Mosfet or Bipolar??) output. If it is Mosfet then it is likely to be running w...
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Romy,
Air core is ok, but. 1. Self inductance in an unmitigated field clumps. You can easily see this by unwinding a hockey puck style air core inductor and measuring the inductance with each turn removed. Never will you have the smooth loss of indu...
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[quote user="Romy the Cat"]3) There is a mistake in Milq circuit. The B+ of the driver stage has almost insufficient amount of critical inductance. It was because I drew the circuit having the Super Milq in my head where the PS was feeding 3 stages a...
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[quote user="be"]Thanks ml8, do you know how much it could swing before problems, either due to clipping or grid current?[/quote]
I would be interesting to know how much plate voltage (and power) 6E5P would have with no bias. If ml8 would promi...
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Hello Romy
Looks like you may be about to set us off salvaging smoke alarms (like that boy scout a few years back) ;o)
An idea that I haven't seen explored yet for low level stages is the use of Peltier Effect heat pumps to cool the valves. As ...
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Hi Romy…and fellow audio nutters. I’ve bitten the bullet, and shifted from BLH to front-loaded. Yes, I was an idiot, a moron for not doing this sooner. My project is ‘humble’ by Romy’s standard…but I feel it meets the following objectives I h...
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[quote user="haralanov"]Are there any signs for worsened transient response of your midbass channel due to the sharp electrical filtering?[/quote]Nothing that I note. The transient response of your midbass channel is a bit tricky thing as the way how...
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I was asked a few days ago what I think about Zandèn new CD player and I replied that I do not think about it.
Truly, those companies produce new models each 18 month to initiate new rounds of cash extraction from clueless, deaf and blind audi...
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[quote user="cv"]You may wish to apply similar tactics to the power supply (low DCR inductors) if you want to be really surprised...[/quote]What do you mean, Chris?
I usually use my input chokes 4-5 times of critical inductance and twice of rated cu...
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Anthony, I am not so thrill
that you are unlashing your into this direction. Not that it is my business and
you can do whatever you want. Still, I feel that methodologically it is not right
way to build a playback. What I mean is that to evaluate ...
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I think it should be somewhere posted for my and perhaps for others future references. Here is the setting for testing Melquiades' single-stage tubes on Hickok 580/580A tube testers. To test the tube as a driver for a full Milq (two stages) set ...
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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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This gentleman's set-up makes me think very much of the one I have in mind for my new room in due course. Whilst as Romy points out, the room might well be on the small side, it has a very high ceiling (say 4.5 m) that in my mind always presents fabu...
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Rowuk, we do not disagree about the "battery/dynamics" equation. As you know, the "accepted notion" from the pundits is that "battery phono stages lack dynamics", and the one expensive unit I've heard did seem lethargic, albeit in a "salon". Howeve...
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Hi,[quote user="dazzdax"]Thx for this well written and highly educational piece Thorsten! It appears that Romy is not very fond of the Audio Consulting transformers, could you give your opinion regarding those? What is your opinion regarding the use ...
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I played with this Behringer DEQ unit for a couple hours. What the magnificent machine would it be if all functionalities work! I mean they all work but they all make sound like shit, even this unit in hard-bypass sounds like shit and there is no oth...
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[quote user="jamesrm618"]The Vincent SP-T100 looks close "The SP-T100 is a hybrid mono block with tubes in the input stage where voltage is amplified. The power output Amplifier circuitry works without feedback." Nominal output power Class-A 8 Ohm: 1...
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I ask Jeffery about crossovers... Yes, the GOTO sub comes with a steep slope. The crossovers Jeffery built (all the horns) are 1st order, and cross-over points fine tuned by ear.
The “what to do different or the same” question was...
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This Sakuma’s is kind of BS. What I mean is that it has the appeal to be “good thinking” but only in the realm of marketing hype, something that the editor of “Direct Heating” had created around Sakuma. The reality is that the Sakuma’s TWO channel Am...
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[quote user="Stitch"]Btw. I think the ML3 is a good sounding amp.[/quote] I do not think that the absolute quality of ML3 is a subject or a question. This quality is not known to people out there, very much like it is unknown to the most of ML3 owner...
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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="Antonio J."]I knew that my asking about the cart used would make you to write the kind of comment you've done. What I've enjoyed most and exclusively of the disc has been the music, all are terrific pieces and some, like the Ko...
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