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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="floobydust"] As for the Wizard's cap... I don't want one... I'm not making magic or doing anything paranormal. When I design a circuit, I void everything in my mind and start clean sheet... plate curve charts come first... selecting comp...
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I do not exactly comfortable with oxric’s preoccupation with “parts”. Yes, there are some amps that invest a lot of attention into parts quality – the silver winding in Kondo, oil caps in BAT, of silver foil caps in AN might be the examples. Melquiad...
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Gintaras, yes, the 10.5mA was a bit too little for gas
tube, 21mA. If you look at the stability of voltage regulation graph for these
tubes then you will see an ark with 15-20ma being atop.
I do not understand why you keep asking me R13
& R...
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Roman,[quote user="Romy the Cat"]May I ask you, this realization of yours… dose it has any “sound”. [/quote]The one we have build which is a little different (6S45 not C3g, also tried WE 417A, 437A, TX-101 Copper not silver, AN UK Line Output Transfo...
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[quote user="morespeakers2"]… I do hope to create a driver that meets or exceeds the S2 in sound quality.[/quote] Sorry, morespeakers2, but I feel that what you say does not make any sense. You are trying to build some kind of theoretical postulates ...
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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="Romy the Cat"]So, Teflon, I do not think you got what I meant. SET has no 'topological limitation' because exists DSET. DSET is free from any, even theoretical limitation, of cause if you prepared to deal with price and power demand...
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[quote user="Romy the Cat"]I do not exactly comfortable with oxric’s preoccupation with “parts”...There is nothing wrong with the selection of the parts that I provided; in fact I personal feel that they were the right parts at that time. So, with th...
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Hi Wellington,
Also I'm thinking to make a stainless steel platter for my RX-5000.
As you have good experience with yours could you tell me the exact parameters of the new design (beveled insight edge, thicker deck part). The schematic would b...
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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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[quote user="guy sergeant"] I hope no one tries to build this based on the diagram above. They won't get much output from it! If you can't see what I suspect are deliberate mistakes, you definitely shouldn't be trying to build one.[/quote...
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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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Sorry I'm a little late here, but anyway... here's something that may worth trying. Apologies that I can't provide a schematic at the mo - I can sort this out later if you like. In the meantime, you'll need a pen and napkin to help visualise this:The...
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Domidaw, you wrote: The photo shows the capacitor c10. Its minus is connected to ground, its plus goes to the output transformer,According to the schematic it is the grounded (minus) end of C10 that should connect to one side of the output transforme...
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Hi Roman et al!Allow me to introduce myself. I have followed with amusement Romy the Cat for many years. He is ascerbic and ultracritical, but he does know audio. We share many tastes, like the Koetsu Onyx Platinum foir instance, on...
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[quote
user="anthony"]First was the issue with the 6e6p for the HF
Channel not being able to draw enough current. I checked the bias and it
was fine and the potentiometer allowed plenty of adjustment so I changed
nothing in the circuit. A new ...
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Here is a Thai guy looks like built my “End of Life Phonostage”
http://www.kaponk.com/node/715
I do not see nether input choke or air capacitors in correction chain. The most important I have no idea what step-up transformer he us...
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Hi, Global.
Leaving aside the unnecessary to be called notion of Melquiades vs. Lamm I would return to the essence of the thread: what changes are necessary in schematic if it goes for 220V. I do not think that any changes would be necessary. All tr...
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Paul-Again the disclaimer - I don't have a schematic nor is the circuit board fully visible, so these are solely my speculations and I could be wrong. 'What is the
MKP's value, and why do you think it's "the" coupler, while the 'Cubes
are else?'I...
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[quote user="hagtech"]Yes, it is an E55L. I wonder how stable it is. Interesting to me how many of these "uber-tubes" are designed for RF operation. Should make a wonderful oscillator. [/quote]
Go figure not stable are they. ...
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[quote user="AOK_Farmer"]I think what they did was to put filters, maybe just a simple capacitor on the AC side to try and reduce the noise that the units inject back into the ac mains. Perhaps they were getting complaints that the units worsened the...
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[quote user="peter foster"]The UPS units are being used in their normal way, as line interactive. The voltage waveform supplied by the Powerware 5115 is a sine wave. This is described briefly in the manual and was important information fo...
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[quote user="floobydust"] On a second note, you can also modify this for both adjustable AC and DC balance on seperate potentiometers. Both potentiometers would be in parallel with the filament (and padded) but you use the wipers independantly, ...
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[quote user="Bud"]You need to find an individual who can design series crossovers. Both JBL and Altec used these, because they sounded best. You will need to look for an individual near where you live because they will have to test the drivers as...
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If to look at the Melquiades schematic in the channel “A” you will see 78H first order low pass filter.
http://www.goodsoundclub.com/PDF/6-Chennal_Melquiades_DSET_Amplifier.pdf
The low-pass filter in Milq and the low-pass filters generally is great...
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Hi Jessie!
I’m probably suggesting the obvious, but have you tried adjusting the crossover component values on the fundamentals and MF-channels? On the fundamentals-channel, increasing the inductor-value, and decreasing the cap, so tha...
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[quote user="Romy the Cat"]
Yes. I’m exiting to see how the new horn I shaping up. Still I do not think that it is about second orders. Obviously in context of 5 channels system, the more channels one gets then less room between them. I still feel...
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[quote user="Romy the Cat"]When you are taking about “caps at higher frequencies”, then what do you
mean? The line level, the speaker level, the line level between? Do not forget
that a RL filter is always preferable over C filter.[/quote]It was re...
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[quote user="hagtech"] The issue I see is that of intermodulation distortion on the biasing of the output tube. It will effectively change HF operating point per supply ripple. Easy to understand if one imagines a gross ripple of 50V.&nbs...
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It turned out that I made my Melquiadenisation with 6C33C. Not practically because it is good or bad tube. The choose of 6C33C was partially accidental: in the beginning I was trying to make an amp that would be able to work in multi-app configuratio...
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