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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I have no idea where this saga with REL leads me. Even though I do have substantial sonic improvement over the original REL version I still do not know if I like this tuner all together. The 50 years all tube tuner with 17 tubes is very freaky thing....
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[quote user="Romy the Cat"]That is a good question and I asked myself it numerous times. My current standing is the benefits are purely intellectual as I am not able to observe the applied benefits. [/quote] Recently I got eventually the box (th...
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Anthony, irrespectively of all the extreme acrobatics you are doing with the inner damping and the structural isolation, sound wave hitting your tubescan multiply all your work by zero. As simple as that. Big tubes = big inner structure structure = l...
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Yes, you are right, I forgot that it is mono PP radio. I such case one ECL82 triode is driver stage and one is phase splitter. Here is a full cur cut of the radio. There is nothing special in it – a very typical circuit. http://www.goodsoundclub.com...
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No question in my mind that the tubes themselves contribute to the sound we get from tube-based systems. Funny how I go to such lengths to get "quiet" tubes and use dampers even as I realize that even the quietest tubes are doing their bit to/f...
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Little I know about tube testing.Here is a link to one that can do a test series on tubes at rated voltages, including 6C33 (with extra-cost adaptor, of course), and it will compare sections at once: http://www.amplitrex.com/index.htmlSucc...
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[quote user="hagtech"]As usual, they leave out the VacuTrace, by far the best modern day tube tester. [/quote]Interesting, Jim.
I was not in the market for tube tester but I looking at your tracer I fugue out that I might sell a few my chea...
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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 your driver stage, wish is ...
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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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Ethan,
Since I published the article “Preamplifiers: keys to mystery” I received many emails from my site visitors asking about Lamm prams and questioning my remarks in comparing what I said to “data form other sources”. Some people disagreed or sur...
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[quote
user="anthony"]First was the issue with the 6e6p for the HF
Channel not being able to draw enough current. I checked the bias and it
was fine and the potentiometer allowed plenty of adjustment so I changed
nothing in the circuit. A new ...
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The reason that I built the 6C33C preamp was to explore the 6C33C true musical potential like I did with the 845. Not only did I compare the sound of these tubes in power amp, but also in preamp. The reason is that with power amp you might hit some l...
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[quote user="Romy the Cat"]That sucks. I use to have a box of perhaps a dozen of YO186 but I did not see it for a while, pretty much from the time I moved to new house. I was listening today some of my “critical” reference stuff and concluded with ve...
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[quote user="cv"] But I don't think they are doing this here. What I would bet is that that they are running the thing in A2 with a much lower Z primary, using a lower B+ and high standing current. They are also using feedback which will help the ban...
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[quote user="Paul S"]Aparently, a few people complained back to Ken Chait that his "carefully-matched" (with an adaptor on his Amplitrex AT-1000 machine, i presume) pairs either weren't matched to begin with, or they did not stay matched. Anyway...
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JJ,
yes, I got Hal-O dampers a few years ago and I do use them but it would require more say then just “I use” them.
I have them for a long time. I initially bought then to use with 7788 tubes that I am employing as an input tubes in my phonocorr...
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[quote user="Romy the Cat"]I was thinking about this: how come that driving 6C33C (in fact driving anything one can imagine) the 6E5P was very fine but driving 2A3 it was dull like hell. I opened the amp and tested all – everything was perfect but th...
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I always was kind of afraid of it. Any single zillion years tube I see is “NOS in box”, “measured as new” or “never work”. So, I wonder where those uses up old tubes are gone? Do people trash them or juts sell them “as new”. As many old tubes I ever ...
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[quote user="DA"]1.How and where to make ground connection to the chassis (signal and power supply and between them)2.What are the test jacks near the 6c33c for (bais..)? In the photos there seems to be a resistor connected to one test jackand ground...
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Romy, I don't think we're in any major disagreement. It's clear you have a good operating point and performance indicates this as well. I did a "normalized" model of this with the 2A3 and 45 and it specs well. All I'm suggesting is that all early an...
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[quote user="manisandher"]It just seems to me that some people feel that they can correct the 'digital diarrhoea' earlier in the chain... usually by using vinyl and/or tubes. I find this simply ridiculous.[/quote]100% agree, audiophiles try to make u...
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Don't take the 'soul' comment too seriously. I just needed a heading! I haven't tried enough of the other DHT options to know whether there are better alternatives within that family. However, it has been my experience to date, that carefu...
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[quote user="cv"] Consider a triode connected 13E1. 95W dissipation, will probably work beautifully with the existing OPT if you adjust the gap down and if you can rewire your arrays to present a somewhat higher impedance.Something like 400V-450V / 2...
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Sadly I have never spent the time to try and correlate the sonics of a tube with the trace characteristics. Ok, sometimes it is obvious. A flat line is a dead tube. Normally I measure and compare both sections of dual triodes. ...
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About a year ago I've take an interview of V.Lamm, and he mentioned his plans to release GM70-based amp. May be it is already on the market. Roman, could you descride your own observations regarding the Sound of Soviet tubes. ...
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Well, it is getting interesting. I was able to make my Hillock TV-2 tester to test the 6C33C. I spend a few hours to filtering the plate voltage and replacing a couple resistors to 50W instead of the 5W. The plate coils in TV-2 is 100mA but it looks ...
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Romy and Paul,Thank you for your help and comments. I decided to move the amp on the floor and on its side so as to be able to monitor it during operation. As it had worked for 10 minutes after replacing the fuse, I was confident nothing sh...
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Hi Romy, KR audio is making high power SET and parallel SET amps using tubes designed by them specifically for low frequency amplification (read as in not radio frequencies). They are getting the power with lower voltages and higher currents th...
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Since I was wondering at Soundstage site I come across Marc Mickelson review of Einstein preamp.
http://www.soundstage.com/revequip/einstein_the_tube.htm
I am not familiar with this unit and but there was in there something that “attracted” me in t...
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[quote user="AlexBerger"]Hello Romy,
What brand of 0A2 do you use in your phonostage?I used RCA, but after 1.5 years of work it began to spark when phonostage is switched on.I tried Siemens, Mazda and now Sylvania 0A2.Siemens has "disco sound"...
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