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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Dima, did you & Romy experiment with contact-potential biasing of the second stage before settling on fixed-biasing? My Spice files are on my old computer and effectively lost else I would run simulations out of curiosity.Brian....
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Domidaw, I am not
participating in helping you too much because I have my own diabolical fun observing
your suffering. Sorry, my friend, I was in the same shoes so many times, literally
having the same feeling and speaking with the same language, ...
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I don't have RF sweep generator but it's fairly easy to source here. I will take the tuner to local FM tuner tech to re-check alignment and we'll take it from there in a couple of weeks. I will have to read more about RF circuits trough this tim...
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[quote user="hagtech"]First, it seems like the tubes are starved. They are running very low current. The 12AX7 is also at low voltage. I'm guessing they are running at about 0.3mA at 65V plate. This operating point is way down...
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I'm strugling with dreaded Mcintosh Mr67 tuner . I borrowed one from a friend and it was very nice ;clear , crisp , dynamic so I went out and bought one for myself . It sounds like a mud and matches 100% of your description of average tube tuner...
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N-set, yes, I did not have any single 6E5P or 6E6P filed on me since it was accepted to operation. About your circuit – you need to talk perhaps with Dima or with others about it. I am absolutely not familiar with PP amps, I do not even understand ho...
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Well, the subject of capacitors in that PS should be resolved. We discussed it a lot with Dima and he feel that I am fool all my idea to try in this supply “minimum capacitance”. He actually does not believe in small capacitance, he has a vision how ...
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[quote user="behhl"]Hi Romy, but I am simply curious that your Designed-&-Made-Yourself have always had the flavour of the names and places from A Hundred Years of Solitude ... Macondo the village, Melquiades the gypsy ... so why the departue now...
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It is looking like I will be constructing the 45Hz horn before some of the others. In considering time-alignment I went back through some of our posts and found this :
Quote from Romy : "...There is another option. Last year, or even before, when...
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If you remember it was the way how it started: HELP: I’m a line-level looser.Then there was this one: The ultimate buffer – light in the end of a tunneland course then it lead to the following: Reviewing preamps by imbeciles.it is r...
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A couple months back I sent to Dima a link with a wonderful collection of audio articles from first part of the 20s century:
http://www.one-electron.com/Misc_Docs.html
In next couple days, talking with Dima he asked me: “Roma, what is REL Company a...
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OK. After a few days of self-education and harassment of various technical people I got what I need – the truth and the reasons why both of my Sansuis TU-X1 sounded so honorable from 75R FM input and so much better from FA-7 input. Below I will...
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From http://goodsoundclub.com/Forums/ShowPost.aspx?PostID=6091[quote user="Romy the Cat"][Dima] feel that Lavry 924 is the only know to him properly implemented true Multibits DAC (and he knows them all) however he feel that there is much more “inter...
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[quote user="Romy the Cat"]
BTW, I think Dima has a Real name for his amp. I hope he would show up in here and would let us know it… The good thing should be referred by own name… It really deserves it.[/quote]OK , being inspired by Romy's Mel...
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I do not remember details already but Dima and I had the same discussion a few weeks back. After all his research he was very much disagree with textbook use of 2A3. He felt that max power and the most proper operation of this tube will be at 275...
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[quote user="manisandher"]Hi Dima,Do you know if this is similar to the approach Tim de Paravicini took in his direct-coupled amp placed inside a Quad? I'm currently using Quad speakers (I gave up on the horn approach through sheer frustration) and i...
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Chris,
My frustrations with HF of this amp reminds me the Agatha Christie novels…. however, like anything else it has an end, even a temporarily end….After some experiments and still being dissatisfied with the HF I ended up consulting with D...
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[quote user="Chirag"]The 6E5P is an interesting device (I did some research after you dropped the "tetrode" hint and bought a few :-)), but the bias scheme with the OA2's is still incomprehensible to me. [/quote]Ok, I will try to explain.
The...
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Dima is keep bothering me with this idea. It is not that he keep bothers – he implanted this notion into my mind and it keep bother me with the feeling that he might be very much right.
He feel that Lavry 924 is the only know to him properly implem...
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Dima's Zarathustra made it over to my house yesterday fitfully escorted by the Cat on a fine cloudy humid and damp New England day. Having heard the original Melquiades I was intrigued what the amp was capable of and looking forward to its arriv...
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[quote user="morricab"]Could you explain a little more about the amp? If I understand you correctly it is a 1 tube stage with solid state (Mosfet or Bipolar??) output. If it is Mosfet then it is likely to be running without negative feeda...
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After a few hours of conversation with Dima and discussing the Avicenna’s details I put the preorder transformers together and light up the Regenerator. I was running it to different modes testing the operation and measuring the results in bypa...
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[quote user="deemon"]Do you mean a battery bias , Brian ? We didn't try it because of 1 V bias voltage - I don't know if the battery with this voltage does exist . I know only 1,5 V and 1,2 V cells ...... maybe using some chemical reactions we can ob...
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Over the course of the enter 2006 Dima and I were involved into the Zarathustra II saga. It took countless phone calls, countless emails, a lot of thinking, numbers of shipments and many hours for Dima and me to propagate the project to it semi-compl...
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I am not a person who understands a lot about tuners. I understand a lot about sound and in the tuner world I am just a user of the things. If I need comprehension of the things I ask questions, I have very limited ability to extrapolate the sound of...
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I was yesterday drawing plans for the Zaratustra II’s chassis and was wondering how I might use it. The Zaratustra II turned out to be a little Monster, efforts-wise and expanses-wise. I hope it will demonstrate some results that will rectify the eff...
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Spoke with Dima last night. He is working on a broken Lavry DA924 units, I guess Lavry own support is so good that people need to find alternative ways to fix them. With all criticism that Dima usually imposes to the design of digital devised he ...
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Keeping harassing different people bout the most interesting options for multiplex decoder for my Rohde & Schwarz EU-6201 I was wondering if it makes sense to me to use the Rohde. It is a very good tuner but it is not necessary result in better s...
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I admit that regarding many subjects in audio I love to sound, to act or just to be a compulsive. However, I feel that my compulsiveness does make sense to me and ironically it does make sense, quite frequency, for some others (unless they are Morons...
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