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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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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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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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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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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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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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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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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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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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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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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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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 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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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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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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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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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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[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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Finally listening to my Melq which I have named Koshka!Here is a photo of my two tiered wooden chassis which I tested before sending it back to the cabinet maker for sanding and oiling.Thank you Romy for your blog and making the schematic available t...
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I agree, I like the idea of glue or resin to attach components to a chassis. It adds a nice layer of damping material. I used to to this with step-up trannys for mounting in a box. Works great with the Cinemag or similar style cans.jh...
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I see, what they did – the built a perfect sealed chimney with two fans to suck cold air in and two fans to suck hot air out. Well, it might work, even though I do like this idea. I absolutely do not see why such a hot and large tube as 6C33C sha...
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Even when you go for a 30K Speaker and you have knowledge about chassis and their pricing, you will discover, they are rarely more than 160 $/piece.And they sound like that. But they eye is cheated with an excellent high gloss paint or expensive wood...
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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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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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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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[quote user="Paul S"]Anthony, it sounds like you have given a lot of thought to damping structural vibration. I was referring to the electro-magnetic fields thrown by transformers, and - based on my view of your perspective drawings - I was wonderi...
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Excellent! I don't use step-ups and I always tie signal earth to chassis earth through a 10 ohm resistor at input.Brian....
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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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