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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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 am not a huge fun of S3 for MF use as the ceramic magnet is less interesting then alnico magnet for HF applications. For the low mid, or as I call it the Fundamental Channels the HF problem that ceramic has do not manifest themselves. My Fundamenta...
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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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…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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This thread has triggered some old stupid sentiments. Feel free to remove this post if irrelevant. I've been thinking how to rationalize my old design in the present context and make it less idiotic.First, know the enemy. I don't know the enemy. I as...
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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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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="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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Yes, well, in this case, it wasn't a new amplifier, it was his old amplifier!
At the end of the day, he tried it and came to a personal conclusion. I also tried it and came to a personal conclusion. Romy is still just farting into the air.
This...
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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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Please, guys, I'm not an experienced builder at all!!Please don't offed a real experienced builders! I'm rather both hopelessly stupidand ignorant. Knowing that, I'm trying to be carefull. That's all. My active participation here, apart from the spir...
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[quote user="Paul S"]Seems like a good basic concept for a laconic PP amp, though...[/quote]
The fix bias of driver and out stages are fine. Why he need to have 1:8 input transformer. The driver stage does 32 time gain, the output stage does ...
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Below are some images that show the locations of the various filter caps within the amplifier chassis.The big cap for the First Stages is located directly below the 6E5P tubes...The big filter cap for the Bass Channel is adjacent to the Bass OPT (pee...
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Unfortunately I've reached out but not managed to make contact with John Hasquin regarding the spacer in the upperbass horn. I'll just have to wing it.I did finally manage to get a day and a half to make the second DSET operational but it refuses to...
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Thanks for your help Romy. Have a look at this (barely legible) sketch so we have a common reference:This is Channel B First Stage bias circuit. All is identical to your published schematic apart from R9 which I had to increase to get the other sta...
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Shannon, from your questions I "understand" that you want to drive lifeless speakers with a hybrid amp that features a 6E5P first stage. Is that what you want to do? What do and don't you like about your present set-up? What do you hope to change an...
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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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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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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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[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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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="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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But here it is. I made this monoblock fit into less than a square foot. It is tight. I use Hammond iron throughout. Their stuff usually works pretty good for power supplies. I have some photos at my blog. [img]http...
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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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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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[quote
user="anthony"]Hi Romy,
Further to my earlier message, I've measured the bias
voltages for the driver tubes in all Channels.
A -4.3V not adjustable
B -13.82V not adjustable
C -4.8V not adjustable
D -4.2V (ran out of potentiometer travel...
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[quote user="el`Ol"]Why not more semi-active speakers with high-sensitivity mid/treble and transistor-powered bass? [/quote]… and it is very important do not overlook this difference. Multiamping is fine but is it severely suffer in case of different...
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Hi Romy,Agreed about the S2 transformer being the most prominent it is here I think that mumetal will shine. I should have said that I was referring to the upper S2 covering 1k-12k or so. I wasn't too clear earlier - when I suggested rolling of...
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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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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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