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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="Dominic"]I know there are millions of ways to implement a digital amp, but i have no idea how easy it is to switch from one implementation to another. Or whether they sound any different.I got to thinking. Maybe a Bottlehead kit of some ...
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[quote user="Cosmos"] Anyway, as the description on our site on second paragraph says, the third 6C33 located at the back, is used as the pass element of the regulator (controlled by solid state circuitry) providing 220V with 100uV of random noise &a...
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(Romy feel free to move this post)[quote user="Paul S"]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 sp...
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Well, as a prototype it might work but as the Milq sound
that I was implied the amp with no gas tubes in bias supply is not good in my
view. I never was satisfied the way how a regular 6E5P driver 6C33C. To me it
was very perfunctory and much unso...
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OK, it took for a while but at this point I have nailed down all design aspects of the new 6-channels Super Milq, and particularly its input stage. I have listen and evaluated all solutions that will be implemented in there; selected, appraised and o...
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[quote user="morricab"] The one thing that the Lamm ML2 does differently than nearly all tube amps is regulation of the output stage. They do this with the 2nd 6C33C that is on the chassis. Even the KR amps don't do this and I think it is...
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The last year there was some chatter up about artificially created so called “digital drugs”. If you are not familiar with it get familiar here for instance:
http://www.usatoday.com/tech/columnist/kimkomando/2008-08-07-digital-drugs_N.ht...
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Paul, there is a number of inaccuracies in your post.
[quote user="Paul S"]Lots has been written already about tube replacement, but I want to mention my recent experience when replacing the 6C33C output tubes (V2). I had the previous tubes in...
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And I do not mean this as a criticism.I had for some time an "original" Music Reference RM9, which was made by another well-educated genius, Roger Modjeski. The RM9 was AB PP with adjustable bias and feedback/gain, with 6DJ8 drivers and a ...
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Hi!Could you tell a bit about how does this:"I end up with 360V on B+, 15K plate load, grounded cathode, 160V on plate and -3.5V on grid via a series battery."sound as compared to the normal Milq bias?Thanksbe...
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[quote user="floobydust"]If you do some modeling you're running about 15.5 watts of dissipation on the plate and pushing over 4.5 watts output. Running the higher B+ voltage (350 volts) with a 1K cathode bias resistor and the 2.5K load results in hig...
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Hi,[quote user="morricab"]Thanks for the info about transformers. It is as I expected, however, that these passive devices are not passive sonically at all. I agree with you that the higher quality of the transformers should lessen the effects ...
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Not to offend anyone, but I find the UHF folks to be extremely pro-Canadian. I think they have a very strong bias. Don't know where Totems come from, but I'd place a bet it's up north. Now right after I click on "post" I'm goin...
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[quote user="cat"]Will your tracer be able to pump 250-300mA at 230V? Will it be able to supple up to 100-110V of bias?[/quote]Not quite. I designed it for preamp tubes. But then I realized I could push it to cover a lot of the more popul...
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Romy, on Fundamentals channel did you leave the 20uF cap at speaker level or did you re-configure that band pass at line level?Are the RC feeds you mention pre-driver or interstage for A, B and C?Is everything still 1st order?Can you say already...
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[quote user="cb"] Yes, it is imposable to have + 0.4V on the grid, 0.0V at input, with R5 resistor in place and the gas tubes outputting +150V and -150V. My apologies, I meant to say I have minus 4.4v on the grid with the inputs shorted. Then I...
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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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...that SS amps do not require significant warmup for best sound. Class A SS in particular need time to get up to temperature to sound their best. A 25W diy Class A that I have here does not stabilise bias for a good 40mins to an hour, more when am...
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Alex, where exactly have you added your big cap bank? The second stage cathode is at the ground. Do you mean the exit of the filament supply which serves to bias the second stage? ...
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This is something I've been chewing on for quite some time and finally decidedto make it happen: a serious Stax headphone amplifier.I hope I can use this space as a sort of a blog-report on the progress...if not feel free to remove. I've been "forced...
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Hi to everyoneyears of reading but never subscribe and post to forumI see that Zarathustra circuit and i m very interested on the first SRPP stageCan someone point out how to implement Melq Gas Bias on that SRPP circuit?I would like to implement a li...
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[quote user="Romy the Cat"]
It look like the project progress well. I have a little concern
about heat the will be building up in your PS enclosure. I do not know what
kind ventilation hole you have in there but be advised that it will be quite
...
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Hi Romy,The Vacuumstate amplifier is not a parallel SET it is basically like push pull but with some kind of trick dynamic bias control that keeps the tubes really together. Much of the low level information that gets lost with the usual push p...
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What I find interesting though, Romy, is that many of the SET measurements show gross distortion even when putting out very low power, which suggests that they are saturated from the high static DC current running through them as they must for a Clas...
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Agreed.... ditch the choke... you don't need any additional decoupling. One last model shows the following assuming a 350 volt supply and a 6K load.Useing a 1.21K cathode resistor, it works best to minimize distortion and balances the transfer charac...
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[quote user="guy sergeant"]Nice to see the glow tubes. Shunt reg for the driver or something else?What type of rectifier/smoothing do the amps use?[/quote]Nope, the both B+ are choke regulated. The positive and negative shunt regulators used in bias ...
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This thread is split from the following thread:
http://www.goodsoundclub.com/LatestPosts.aspx?ThreadID=2665
Jessie, I hope you do not mind that I pulled it to the forum explicitly dedicated to the Melquiades Support.
5-channels Melquiades is ...
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It is sucks to live with Russians Tubes. It is particular sucks to live with 6C33C. They are all deferent when they new, they age very ungracefully and differently.
The life with Super Melquiades, where I use 6x6C33C driving individual channe...
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Hi Romy, Your amp schematic is intriguing. I have a question about the dual supply for the input tube grid bias. If my preamp uses an output coupling cap, do I need plus and minus supplies ? The interconnect will be biased at the sam...
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It is ridicules how pleasant the Yamaha B2 sound when it operates in class A and how much worse it sounds when it switches to class AB. I did not measure the power but with default 40mA it switches to class B very soon. With my current cooling te...
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