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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi Romy,The builder regards VR1 more like an "offset to 0" adjuster than a bias control for the 6E5P since its working range is quite narrow. He asked me to know from you if along the 6E5P's lifespan it needs further adjustments at VR1 or if a single...
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[quote user="AnonymousUser"]Thanks for your response! I have never tried grounding the cathode in any of my tube projects. Even my amp output stages have been mostly cathode biased. But I am going to try grounded cathodes (and the +/- input stage sup...
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Ok, the Headphone “Baby Melquiades” protect is over. Well, kind of over as there are some issues still are hanging in there.
A brief summary. The initial idea was to use the Melquiades’ input stage to drive headphones. Unfortunately it did not...
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It is imposable to live in Boston…and particularly since I installed that large directional rotatable antenna on my roof and able to get everything high quality from Rhode Island to New Hampshire. The only problems that I see… is the hard drive space...
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Hey Cat,Well..my first question would be regarding the application. The big Melq tube is already doing the bass towers...is it not enough current? And wouldn't a proper class A 100w amp with its low low efficiency require something like 1...
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…and I hope you did put your ET-703 tweeter in a time aligned position, did you?
The AD1 tube was one of those original “better sounding” triodes. I have a quite few of them; in Telefunken 1936-139 radios (I have 4 or 5 of those radios them in my st...
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The 6sn7 is a fine amplification tube for use in preamps or gain stages, but it has way too high of an output impedance for driving power tubes. This is my personal preference. It also depends greatly on the topology. Maybe George u...
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[quote user="hagtech"] I didn't want to steal any of your ideas. [/quote] This is very bogus notion. If the 6E5P is somebody’s idea then would be not me but Dima’s as he discovered the tube “for Sound aplicatios” in 90s while he was fixing a TV. Howe...
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I was right before but now I really review my rightness for a new perspective. Yes, the compressions drivers are the subject of clean signal but it what I witness with the new 6-chenals DSET put what I said above in another extreme dimension. I do no...
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If you study the above, you'll note that the topology involves some compromise, namely, a trade-off between a lower series resistor (for better drive of the following valve) versus a lower current draw through the CCS . This draw has to come through ...
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The Czech Republic-based Emission Labs Company introduced their new replica of famed AD-1 Triodehttp://www.emissionlabs.com/html/club/labreport.htm
It looks like Yamamoto, Japanese amplifier manufactures has made an amp with this tube: A-06Shttp://w...
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Contemplating now how to organize biasing for 3 singe stages of my 6-chanls amp I was faced the dilemma: do I need to bias my tubes. The 6E5P/6E6P are Russian tubes and it means that are very different right from the boxes. The Milq, driver tubes, be...
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Another decision that I need to make about the new Super Milq. I have MF and Fundamental Channels around the Vitavox S2 drivers that will be driven directly from the single-stage amplifiers, with the crossovers and attenuators sitting at amplifier li...
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[quote user="Romy the Cat"]If you read the very important post: http://www.GoodSoundClub.com/TreeItem.aspx?PostID=5255 then might understand that it lead to a painful research on the subject. I have ton of data now and many experiments done. If ...
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[quote user="op.9"]Could you help me understand your biasing scheme with this version? I thought I understood the original Milq circuit - but the only channel that looks like that to me is the D channel. I don't get A and B at all! what is the 50 ohm...
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Interesting….. It is interesting to think about the relational of Melquiades slow take-up. I think that major contributing factor is that guy who calls himself Romy the Cat. Really, I think it’s it. The people who are capable to build amplifiers more...
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people think you can use 6e5p single stage full range.
like for example
http://diyparadise.com/w/purist-wet-dream-gets-wetter/
stiff sound aside what about the b...
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[quote user="shannon"]couldnt get "insert
iamge from gallary" to work so i attached it. Had it working for a couple weeks. Single stage 6e5p testbed. The
B+ rcore and output transformer is underneath. In the end r23 of 30k
worked with 30h chok...
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[quote user="anthony"]My interest is
mainly in the 10Y/801A/VT25 tubes on one hand and the 45 on the other hand.
The YO186 also interests me a lot especially after reading your
impressions of it in your circuit and system, but it is a very diffic...
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I do not think that 6e5p driver stage withh ss could be useful for proper playback. or would it somehow be melq.
I am familiar with the proven method. in the case of melq it should be followed 100% exactly. I am very greatfull for ...
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Nope, the Russian tubes generally much, in fact much worse than western equivalents. There were however some exceptions. Those options were due to various reasons. The tubes like GM70, YO186, 1P24B, 6E5P, 6N30P, BO188, GM57, UB180, 6C33C, 6N6P, M...
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Ending up re-amping my MF channel, I found myself at unexpected situation that I am not completely compostable with Macondo HF. It is not that the HF are bad but they were made to serve the interest of older, slightly softer operating single-stag...
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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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Romy, I'm of course familar with your MF design and Jim's 6E5P curves is what I base my considerations on at this moment (along with the corresponding Spice model).Your DHT MF is quite self-balancing due to the large cathode resistor. WhatI have in m...
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Sure I was not able to do not listen it as the pain dried. It was incredible ad-hog sting of the drivers. All woofers are series. I know, I know but they are 4R each and I wanted to drive it with 2A3 just for the first test. The post is tuned - I hav...
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We all know how low-power SETs sound driving low-sensitively ported speakers. The Morons feel that it they have “enough volume” then their SET is good to go. Of course it is not the case and low-power SETs shell not driver dead speakers.
However, I ...
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[quote user="nl"] Gordon Rankin of Wavelength Audio did a series of one-stage DHTs with a step-up transformer input about ten years ago. I think they were called the Mercury series. By all accounts, they sounded good, but of course had limited gain, ...
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I received a comment form people who reportedly well-familiar with using the high-frequency high gain tubes. They suggested me that the resistor between screen and grid (R23) might be eliminated and that would bring some benefits. It very much might ...
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This idea keeps to fascinate me.
http://www.goodsoundclub.com/GetPost.aspx?PostID=4063
and I really would like to try and to see what might happen. I’ have decided of move this task on my levels of priorities as something that I wo...
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Well, the more I think about it then more I realized that I would like to try it. I’m contemplating to make 5-6 channels on single-stage Milq: 4 channels for each Macondo channel and 1-2 reserved for any perspective lower bass channel or for perspect...
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