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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="drdna"] Not that the sound is bad, but my technique must be bad. Because sometimes during the day the sound will get really particularly bad, even to the point that it sounds like clouds are passing by over the music, if you unders...
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It, looks like the problem with the steel chassis picking up stay magnetic fields from my Super Milq’s power supply is about to be gone. With the introduction of the 3 extra single-stage channels I needed more current for 6.3V filaments and slightly ...
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It is completely irrelevant how frequently an amp switched off and on if a soft start is made properly. A few years ago my friend and I, having the 6C33C based Lamms ML2 (where I do not like how the soft was working) , noted that we both change the o...
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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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This thread is split from the following thread:
http://www.goodsoundclub.com/LatestPosts.aspx?ThreadID=2665
Jessie, I hope you do not mind that I pulled it to the forum explicitly dedicated to the Melquiades Support.
5-channels Melquiades is ...
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All transformers are phase inverting. The lowest leakage point of primary and secondary windings relationship to conventional E/I and C core is the physical start of the helical spiral winding. This is assuming more than one layer of wire. In toroid'...
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I was wondering what is coming out from PP2000 that makes one unit affect another. It might be radio and magnetic stray fields. Last night I took my gauss meter and was sniffing all around my PurePower regenerators. I was not able to see any signific...
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Was priveleged to hear Romy's system on Saturday. I must say he's done a superb job both musically and esthetically over the past year, and except for one minor niggle has surpassed what he had in Boston. That was the very low bass, but he has stated...
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I'm about to do what amounts to building a new system.What i'd like to do is build/acquire a set of amps that can be hotrodded if-you-will in the vein of the melquiades re: channel tuning.my goals from a technical/mech perspective are the following: ...
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I designed up a steel chassis for both the Fullrange and DSET Melquiades. Here they are screwed together for the first time. Then I have made sure all the cutting and drilling has been in the correct places by quickly putting the parts in their pla...
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Ok, I connected the DH DSET channel into the main Melquiades amp driving the DHT from a separate transformer. Until the final transformers arrive I will be able to test and to measure DH circuit, perhaps finding better operation. I connected to the D...
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My system can be viewed here https://www.youtube.com/watch?v=GiIzpv_R-W8My front end TT and R2R. You can see the upper bass horn built using Fane Studio 8M on the other side of the Duo.Tribute OPT and Nichicon PS capsPS Board insituPower supply board...
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I was involved many years ago (1985), in the design and manufacture of a 'low mass' turntable called the Voyd. This suspended design used 3 papst external rotor synchronous motors to drive a very light acrylic (and later polycarbonate) platter. The i...
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I am somewhat familiar with the dact: I used it in non controlled manner but familiar environment; it was assembled by someone else who also provided the necessary power supply; it was in two chassis about 15x15x~30 cm each (one for ps), so the equal...
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Paul, after a month of vacations I've tried you advice:[quote user="Paul S"]If you can do it, try isolating both cases/chasses from your "ground plane(s)". Use one inclusive "ground plane" for both the PS and the gain/RIAA sections, and ground this "...
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N-set, I don't know much about the theory, but maybe you have focused on "uniform ground potential" while neglecting the effects of EMF? (Not to mention the EXTREME difficuty of maintaining a "single", non-reactive "ground path" in the first place.....
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Romy,I try to remove the step-up transformers & short the
input grid, the hum has gone.Than, I did next changes:1. Twisted wire from input RCA to step-up transformers. Connect transformers input & output ground directly (not thought ground ...
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I spend my time/effort/money to get a good sound from computer or MacBook.my trial and error proved me that I could not attack CEC TL0-X by Computer Audio.I also lost my money 4500$ in ordering external PSU to Paul Hynes. Paul is not trusted and do n...
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[quote user="Cosmos"]Indeed it took me a very long time to decide upon regulate or not. I ended up with regulation option to save some chassis space and weight, otherwise I would need at least 10 kilos more and 30% bigger space that would make the wh...
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Thanks, Chris.
Dima I discussed today many imaginable scenarios. Initially we thought drive a single 6C19P from MF channel of super Milq. But it has some negative consequences… Eventually we decided (it is not final decision but the final with 90% ...
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Truly desperate scofflaws might find themselves so annoyed by the hum that they lift the PP2000 AC ground connection at the PP2000 chassis and run that unit's ground only to a dedicated ground (with a lower impedance, of course), ...
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Romy wrote :
"...What I would do next is to lift ground at the 2000PP input – and then ground the PP2000 to your own ground. Make sure that no other devises on your playback use the main’s ground..."
drdna wrote :
"...I did this already; it...
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[quote user="Bud"]All transformers are phase inverting. The lowest leakage point of primary and secondary windings relationship to conventional E/I and C core is the physical start of the helical spiral winding. This is assuming more than one layer o...
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If one is using multiple in phase drivers, they are spread out over space and help reduce resonance by interference. Another possibility would be a B&W like lightweight matrix enclosure to move resonance UP, where it is more easily damped. A thir...
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Anthony, I didn't realize the potential of your remark, thank you. The chassis has been tied to the signal GND already at the birth as otherwise the phono would develop noise even off the wall. I have to go throroughly with a scope to see where the n...
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Jarek, what you describe can happen if anything with voltage touches the chassis, or something might be arcing across a very narrow gap. I have seen part leads that went too far through PCBs, also carelessly fitted stand-off. Even the axis of a choke...
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[quote user="Stitch"]I listened to those some time ago. It was a full Lamm combo with ML3 + LP2 paired with Wilson Alexandria. This Doc from the WBF Forum never missed a second to tell the world how super this combination is. Above the holy grail. I ...
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This may have been mentioned already. . . if so, it escaped me. But here's the thing: Each component has its own AC chassis leakage characteristic. This can be measured, and lining every component up by the same polarity produces less noise & hum...
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[quote user="N-set"]Rings=poorely damped, due to its crystaline structure. Take a granite tile with two fingers, put your ear close to it and knuckle. Observe the sound.Repeat with other stones to compare. For that reason it's neither used in nanolab...
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OK, the next step is kind of done. All transformers and chokes are done form “outside” of the amp (under the bulge). I have attached the capacitors and the output transformer to the “inside”. This silicone attachment that for the computer grade...
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