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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Well two power supply's ready and one full range amp hooked up.Nothing blew up so that's good!1) output stage 200mA /187V2) driver stage 205v (test point A) and -4.3v bais3)setting 0.000v on input is ok but not stable,some DC drift4) bais lines are l...
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Hello Mani,I am using a 10KW balanced transformer on my system with dedicated earth just as you are, I use two 110V power lines to enter making it 220 volts on the primary and get 110 volts on the secondary with the earth. I have a rod in the garden...
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[quote user="Antonio J. "]MFA e-mailed me aknowledging that I was perhaps going to try the DIY way getting a "raw" transformer from S&B and offered me assistance. The "problem" is that their unit with a gain selector and load selector is way too ...
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Dear Romy,
Obviously it is impossible to convince you upon the frequency response of our transformers and in any case that is fine with me since everybody is entitled to its own assumptions and opinions and this is not bad at all, on the cont...
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Hello everyone:I exchanged a couple of emails with Romy, and since the topic may be of interest to everyone, I am posting the emails here. Just in case anyone wonders, of course I checked with Romy to see if he was alright with his reply to my em...
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This is Romy's unit that he let me borrow.It does produce the cleanest electricvity I've heard in my system in over 30 years of trying.A new find last night: The one amp with the problem power supply transformer is buzzing at the same frequency as th...
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hmmm sorry Romy for the lost of your pp2000 ....I would like to share one opinion from a technician that lives in Japan and lived in Chile . We were discussing the issues of electricity and he said "Lines in Chile are poor quiality , cables are too t...
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[quote user="AnonymousUser"] Line level crossing or passive speaker level crossovers-same devil. [/quote]
If you are planning to build a dedicated LF SET then the line level crossing vs. passive speaker level crossovers is not the same devil. With a...
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Sine I informed public about Melquiades amplifiers I receive many emails from people asking me about the operation points of 6C33C. For whatever reasons people mistakably took me for some kind of 6C33C guru, which is am not. Moreover I could be hardl...
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[quote user="Bud"]I am about 3 weeks away from supplying 3 Kz ohm to 4,8 & 16 ohm SE outputs for 300b or 2A3 tubes to George Wright, of Wright Sound, and Gary Pimm of Pimm CCS fame (constant current controls to buffer stages from each other ...
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yesterday i had a conversation with an engineer who was in UPS industry in Tehran.he told me they install isolation transformer after UPS for better isolation for medical equipments.he told me most industry UPS manufactures produce Class D inverters ...
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Hum is a multi faceted problem. We have identified 4 completely different causes of hum in amplifier power supply transformers exacerabted by AC power problems - and that kind of hum is not even the most common hum audiophiles have to deal with. ...
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First of all: I have moved this thread into the Milq Forum…..
[quote user="RonyWeissman"] I'm going to try and build a Melquiades type amplifier (with some help from friends) following the advice given above to make it as simple as possible.&n...
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[quote user="guy sergeant"] I would however be interested to hear the ET transformer. What do you understand of their construction that makes them so well regarded? I see they were made in MA. Do you know the people involved / where they were wo...
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First major audio observation that I made is that my Super Melquiades should be revised. After a year and a half of using the amp I came across to some conclusions that outlined the prospective changes in my DSET.
1) The phase inverters after...
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And I do not mean this as a criticism.I had for some time an "original" Music Reference RM9, which was made by another well-educated genius, Roger Modjeski. The RM9 was AB PP with adjustable bias and feedback/gain, with 6DJ8 drivers and a ...
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Sorry, I should have said by now that my (15" Audax PR380M) bass units are FLAT to 38 Hz, and then they roll off naturally at 24 dB below that, meaning if I have 38 Hz @ 100 dB, then ~30 Hz is still >88 dB, and obviously 20 Hz is still p...
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BTW, the Jessie, since you will be apparently mingling with you PP converting it into Euvro (Romynism form European Voltage) then you might find the comments of the PS Audio owner worth attention. Sure, not when his older PP is archaic product he is ...
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[quote user="Romy the Cat"]I still doubt that you were, by the virtue of insulation transformer and ground, able to get what PP2000 gives but as you understand there is no ways, or even needs, to address my doubts.[/quote]Yes agreed, there's no need ...
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I like to stress a point that the mammals that write thier doodles for audio publication are not juts ignorant fools but also the cheap, low class, falseificators. No wonder that the audio manufacturing companies do employ the so-called reviewers as ...
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This weekend a friend of mine visited me to listen my playback and there was a very illustrative occurrence. We listening my audio and everything was like it should be in the program. He was visiting my last time in 2002-2003, before the Macondo was ...
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***The proper loading value is difficult to say without knowing your system, as it is partly a preamp and ultrasonic RF issue as well as one that involves the cartridge and audible frequencies. Some cartridges have frequency abberations within ...
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Jessie, I have two comments/questions.
Are you sure that using the USB you do not use the sound card? I am a software guy not a hardware guy and with my limited understanding I presume that an application that reads a file must talk to so kind of dr...
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[quote user="Romy the Cat"]Over the course of the last year I have been gently harassing my transformers-savvy surrounding trying to evangelize them into amorphous core. They stubbornly and perhaps stupidly resist. Some of them not…
During th...
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[quote user="Romy the Cat"]
[/quote]OK, now, after mach thinking, consulting and very little actual listening I have finally conceptualized my next move with powering Macondo MF channel. Considering that I have some extra space Melquiades’ ...
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After a few years I have again pair of Lamm ML2 in my room and I decide to take advantage and render my experience with this amp into a format of my today’s understanding. I know ML2 quiet we and used it with a number of loads. Over the time I develo...
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[quote user="KOTriode"]The preamp has the classic tube regulated power supply using 5R4, 6AS7, 6SJ7. It is transformer coupled output and has no capacitor in the signal chain, the gain is about 8db, so it is not a buffer. For convenience, it does...
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It is impossible to make two amp with the same quality with such big difference in output tubes , the transformer design are vastly different, a 10Kohm transformer would never have a good bandwidth as a 600ohm transformer. I just have to experime...
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Recently, I made a movement toward to a project that I have been contemplating for 5 years – I would like convert my Expressive Technologys SU2 and 2x834PT tandem into a final packaging solution.
For the last 5 years I have learned following:
1...
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I recently could not pass up a good deal on a EAR 834P MM, so I will have the opportunity to compare it to my current phono stage. It is funny since I had planned to listen to EAR phono stage in my system about 10-15 years ago when I lived in Santa M...
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