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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="anthony"]Hi Romy,So, six channels are now operational in the first DSET. By up I mean the anode voltages on all tubes is about right and the currents are in the ballpark of where they need to be. I am yet to check the DC Offset so hope...
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I kind of less care about Lamm or about his new amps but rather I am interested using the example of ML3 to see what the DHT tubes are capable off. There are some people who worship direct-heated tubes and attribute to them some ventures (like ...
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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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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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[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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[quote user="skushino"]Have you considered the opportunity of raising your upper bass HP crossover? How high do you plan to use your mid bass horns? If your mid bass is comfortable playing up to 280hz (or whatever the right freq is), you can use yo...
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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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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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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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[quote user="drdna"] So it would require a new OPT to be made with around 3.5-4K primary impedance. The power the amplifier puts out is already far too much. I always have the volume dial around 1-2, so this will be okay. I don't have such an OPT on ...
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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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[quote user="Romy the Cat"]BTW, I have a local Bostonian guy have replied brought today a very interesting DHT amp. He has a number of DHTs and this one he reports is the special one, quite expensive as well. Although the electricity was not good tod...
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N-set, I understand you do not mean to hijack the thread with the Axiom, so I actually tried to make generic and/or thread-related observations. I don't know the 6E5P, but generic issues with specific DC tank circuits and driver and output tube stab...
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Paul, 100% agreed on the real world test vs all other mental exercises!!!Not sure on what do you mean by the "follower"?Yes, I need only 2 stages, perhaps TVC at the input. I'll even have a bit too much gain, if I'm correct.Romy style bias on 6E5P an...
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Panos, it is not about convincing me. My standing is absolutely irrelevant in this subject – I do not sell audio and do not making living by evaluation of SET amplifiers. I report what I have witnessed, nothing more. Sure, it is very possible that y...
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[quote user="vuki"] To tell you the truth I was already very satisfied with sound, but I just wanted to make that powerful triode amplifier - I really don't need it. But it's nice to have it. As you know in this hobby it's not so much about the end o...
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AlloOn the matter of the DHT having a plate resistance of 500-700... you do realise that running the 6E5p with an unbypassed cathode resistor is giving you an effective Rp of about 12k, right? The formula is, IIRC, Rp + (mu+1)Rk.Given that 12k seems ...
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Hello Romy,I've only heard the 801 in class A2, but I can easily imagine that the 10Y or 801 with nickel output would offer the purest possible sound in the 1k-10k range, such that it is the S2's true voice you are hearing. It's something I'm going t...
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Well, as I understand there is no truly GM70 vs. 6C33C context yet (sound in the respectfully equitable load) from you and it will be very interesting to hear from you when you feel that you are ready to say something. As I understand they are the sa...
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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="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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Well, it looks like I got fucked by the transformer company.that realy sucks !!! I have not talked to them yet ,but even if they agree to replace them it will take at least 6-8 weeks plus international shipping cost , import tax , VAT .Filament tran...
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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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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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…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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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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R,Please excuse me if this is straying from the subject... feel free to move.Anyway, I was in NYC until Wednesday evening, and I assume I know what is motivating you to abandon Macondo/Melquiades in the hot summer months... what I don't understand is...
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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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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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