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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Very interesting! (and impressive construction there KO)I know this isn't quite the subject of the thread, but could you tell a bit more about the 212E amp, in particular, the regulator topology?Regarding 845 vs 211 - Romy, I suspect what you were he...
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I always was “concerned” about those large high voltage triodes: 211, 845, GM70…. They kind of different… The 845 always was brutal and not elegant, 210 was elegant but not sophisticated, and the GM70 was sophisticated enough but no one build a...
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[quote user="Romy the Cat"]I always was “concerned” about those large high voltage triodes: 211, 845, GM70…. They kind of different… The 845 always was brutal and not elegant, 210 was elegant but not sophisticated, and the GM70 was sophisticate...
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Hi,[quote user="morricab"]As to the best transformers souding more transparent than the best resistors, I'll believe it when I (don't?) hear it. You claim to have heard this but I most certainly haven't. [/quote] Well, the claim is no...
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This material is courtesy to Mr. Shibazaki, the owner of Sibatech Shop in Tokyo, that sell internationally Japanise Hi-Fi equipment.
http://www.sibatech.co.jp/
I hope that Sibatech people are more decent then our american distrib...
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I took receipt of my new Anima speakers yesterday.Aesthetically, they match my listening room very well. Early days, but sonically, driven by my 211 mono amps with Elrog output tubes, they easily better any other speaker I've had in this room. It's f...
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I always was “concerned” about those large high voltage triodes: 211, 845, GM70…. They kind of different… The 845 always was brutal and not elegant, 210 was elegant but not sophisticated, and the GM70 was sophisticated enough but no one build a...
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Amir wrote:I bet you hear good sound even better than over 50k$ transports. our last test was CEC TL0-X vs my Berkeley , they sounded very similar.
This idea was not shared among everybody pr...
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Yes, it would be very interesting to hear the difference between a 6C33C amp with and without tube regulation, but also they are too many thing to try too, ... the possibility is endless here.My recent experience with two different ...
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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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[quote user="Romy the Cat"]Celsius, I think you do not take in your equation the input voltage. If you bias 6E5P with 4.1V then it can pass 4V with no feedback. Since the tube has under normal circumstances 33 times gain then you have 132V RMS from ...
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I have a preference for making the power supply a certain way and using certain types of components. If I do that and am consistent about it, I can get better results from some of those old tubes than I can from the more recent types. But hearing one...
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[quote user="Romy the Cat"] Celsius wrote:The problem is that my target is drive a 211 as full amp, and my CD player give a litle bit more than 1v to grid. What do you think 1V x 33times x 2.8 give 93ppV enought to drive the 211. Well, you nee...
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"You need to realise that the physically larger a Transformer becomes the narrower the available bandwidth for a given construction. Due to the need to handle a lot of "magnetic bias" SE Output transformers become very large, physicall...
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The transformer in this preamp was given from a friend who want to learn how to wind transformer. If I remember correctly it started out as UBT, they were bought (when UBT was operating in the Silicon Valley) at the company swap meet. They were rejec...
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[quote user="Celsius"]The problem is that my target is drive a 211 as full amp, and my CD player give a litle bit more than 1v to grid. What do you think 1V x 33times x 2.8 give 93ppV enought to drive the 211. [/quote] Well, you need another ga...
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[quote user="KOTriode"]Romy, in the contrary, it is very unfair to compare my 845 amp with the 6C33C. The main reason is the 845 amp used the best output/interstage transformer available, while the 6C33C's output xformer is pretty good but far from b...
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I bought those tweeters for Be Yamamura (second hand from Paul at Wembly Loudspeakers, in London) I also took Be to Heathrow Airport to take a plane to Brazil to install one of his truly superb VT4c stereo amps! It was the morning of a great wind ...
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[quote user="Romy the Cat"]Celsius, I do not know what CCS you impended, did you drive 6e5p’s plate with constant current source?*1 I also do not know/like 6e5p with battery bias. The only application that I find 6e5p suitable was the Milq-style bi...
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I briefly listened to this DAC but with a balanced stage using 101D at Fikus location in his listening room (we were testing an anti-vibrational platform I and my partner have designed). The system was a complete unknown to me (Lampoizator own amps o...
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Very interesting! (and impressive construction there KO)I know this isn't quite the subject of the thread, but could you tell a bit more about the 212E amp, in particular, the regulator topology?Regarding 845 vs 211 - Romy, I suspect what you were he...
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I'm sure there are many bad implementations of the 845 and 211. Almost all of the commercially available ones are pretty mediocre. However I have heard good examples of both so I know it can be done. I've yet to hear an impressive 6C33 amp so it...
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KOT, with the ML2s I found very little difference in the sound of various 6C33Cs, but the old Svetlanas certainly "held to spec" better (and longer..). I find the 6C33C to be more "direct" sounding than 845 or 211, but this in the context of a 3-sta...
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[quote user="guy sergeant"] I'm sure there are many bad implementations of the 845 and 211. Almost all of the commercially available ones are pretty mediocre. However I have heard good examples of both so I know it can be done. [/quote]
Actually I d...
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[quote user="Paul S"]Yes, we are all adults here, but I hope and pray that readers just following along and dreaming about "ultimate" systems will not take it upon themselves to actually try any of this stuff at home! Be advised, all, that the volta...
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… I do not consider it as an interesting driver and I have a good feeling that you will review your desire to drive 2A3 with 7788. 7788 is phenomenal for different application (ultra low noise + ultra high Mu) not for driving power triodes. Jim, if y...
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Romy says:[quote]The problem is that in context of those amplifiers the COST BECOMES THE MAJOR DESIGN IMPEDIMENT[/quote]Yes, but it shouldn't -- should it?Let's be reasonable (a tall order). Either a designer knows how to design or not. If he doesn;t...
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[quote user="vuki"]Anyway, my plan was to make powerful triode NFBless amplifier for relatively small money. I'm really satisfied with what I did. Maybe I should have done GM70 SE, but what would be my next project then?[/quote] The GM70 is a bitch a...
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[quote user="Romy the Cat"]HookEm, I could only advised you on methodological aspect as I do not extend any recommendations about purchasing decisions. The 17x15 x11 is a very large room for a single driver speaker. If you insist to use a single dri...
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[quote user="anthony"]...you've got me thinking about this now. I'll talk to some people here and see what they think, but it should be easy enough to place a shield between the OPT's and the tube bases.Thanks for bringing it up. I am looking for o...
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