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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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Somewhere in 1997-88 I bought a hundred 6C33C. I believe during those years the where more expensive then now and I paid around $7-8 per tube. Over the years burning the 6C33C in pair of VK-60 (8 tubes), two pair of Lamm ML2 (ML2), ML2 with Melquiade...
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[quote user="hagtech"] Please do. I have interest in the result myself and don't mind spending the time. I can post photos for each tube. [/quote]
Sure, let do it. Email me your address and I will send them to you. (Do you have sockets?)...
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Was talking with various audio people about the 6C33C I was amazed that people are so clueless about this tube. The people are so filled with some foolish prejudges and faulty notions about 6C33C that I deseeded to put together a brief “6C33C user ma...
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Well - there is a technical literature related the cooling of the tube. According to it the temperature of the glass surface is not equall - it is hire in the places, where heater is visible. So - you can make a pair of radiators, at...
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Srajan Ebaen made a write up about a Polish amp from Ancient Audio
http://www.ancient.com.pl/e_single_six.htm
http://www.6moons.com/audioreviews/ancient3/single6.html
It is good that Srajan do not write about sound anymore, whenever he did it appe...
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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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As I've mentioned elsewhere before, over the years I've gotten about 25% clinkers, among all tubes, from all sources, including "specially selected, graded and matched" tubes. Also, I have lived with the 6C33C enough to say it "drifts" in use, and i...
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Forgot to elaborate the Quad system.It is actually a tri-amp Quad system, below 100Hz is the Supravox 15in Field coil in open baffle, then it's a Stacked Quad ,and about 5Khz there were 5 RTR ESL cell. I did try the 6C33C amp in a single pair Quad by...
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[quote user="KOTriode"] The Melquiades give me inspiration to build this 6C33C amplifier. It's on a stereo chassis that has few unique features - Vacuum tube rectifier separately for Input/Driver and Output tubes. - Regulator using the same tube ...
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Romy,
I have good confidence that it was the tubes and not the circuit. I have checked the cathode driver that bias the 6C33C and there was not any problem. Sure if the cathode bias failed, the 6C33C current will shoot way up and burned up the fuse...
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I see, this tri-way Quad system for sure shall be much different from regular Quas. I kind of even understand why you stay with open baffle bas to support the system’s bass. For sure it will not Bruckner-style pressurize a room as non-dipole bass wou...
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KOT, as you may know, the ML2 has a BIG transformer to make "36 Watts" at clipping; but even with this and the trick feedback it is not the first choice for large dynamic/OB drivers. Of course I mention this because of your remarks about the 6C33C, ...
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A small word of advice regarding wiring the 6c33c heaters.My DSET's have now have several thousand hours of use and I love them to death. I've not heard any amplifier able to do what they do. The first amp has over 10,000 hours now and has never fa...
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Well, it is not necessary a fully qualified urban legend as the problem does take please with fixed based 6C33C but..... only under certain conditions. I have written about it a lot on my site but will very briefly recall it again.
Dima might be cor...
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It is sucks to live with Russians Tubes. It is particular sucks to live with 6C33C. They are all deferent when they new, they age very ungracefully and differently.
The life with Super Melquiades, where I use 6x6C33C driving individual channe...
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[quote user="KOTriode"] Without regulation, this amp would not work correctly due to its design: DC coupled and fixed bias. The high transconductance will make the bias current varied as much as 50-100ma due power line fluctuation without the reg...
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The 6C33C preamp? Hm, this is bold. As I see you use it as a single stage buffer with only one 6C33C and couple output with a transformer? I head the Germans built something like this but I never heard it or saw it. I do not feel a need for such ...
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What would I do if I move to a much larger room and the power of Milq’s full 6C33C would not be enough? Surely it would be possible to go for transmission tubes but they all high plate impedance and high voltage. If I parallel all my bass drivers and...
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[quote user="KOTriode"]Ok, I just read your "Melquides Remote biasing". This technic can not be duplicate in my amp due to DC coupling, the C3G (I dont use 6E5P) driver stage basically adjust the 6C33C current in the output stage. Just for curiosity,...
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OK, the amp is running for the 6C41C for a few days and it looks like the tube should be burned-in sufficiently enough for now. Still I have to note that the sound of 6C41C was not changed since my initial listening of this tube.
Originally I drove ...
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Hello Roman,Hola from Hong Kong! How are you? Haven't been here for long time. I have a question at the back of my mine for long time, and it may have been covered elsewhete in your blog before. I am asking it here but do point me to the thread if it...
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[quote user="Romy the Cat"]There are no good ready to go transformer for 6C33C. Tangos are garbage. The 20 years back Tangos were OK for small tubes but Tango is long gone and whatever crap they label by Tango in fact Chinese transformers agglomerat...
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KOTriode, I got a feeling that your unfortunate experience with the few presumably bad tubes that and your former experience with DHT tubes made you to treat the 6C33C as it is some kind of fragile princess. Filament burned for more than 20 hrs befor...
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[quote user="Genn"] Another issue of the 6C33C - short lifetime of the socket. I think, that ventilation will help to extend their lifetime as well. [/quote]It is not a problem with the 6C33C but with the stupidity of the very specific Russian ...
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[quote user="KOTriode"] Thank you for the comment on this amp, this is my first time of using the 6C33C tube, I decided to build this amp after reading about the Melquiades, this amp is just a quick experiment on the 6C33C sound, since I have a s...
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Very interesting, and no surprise, really. But who makes a tester that allows for dynamic testing of the 6C33C?I suppose we will just have to keep our ears open, as ever, in order to know when something is not right for our own applications.It ...
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Since I know about a few ongoing attempts out there by different people to build Melquiades I would like to share with some of my observations regarding corrections, simplification and possible modifications of Melquiades amplifier.
Obviously you ha...
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Morricab,
I do not know the “truth” and what I said are pure my speculations based upon what I hear and what I measure.
Yes, Lamm drivers at 310mA quite hard but do not forget that his objectives, besides everything, were to get out of his SET max ...
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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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