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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Romy, Some very good points here... if I downloaded the correct schematic from your site for the 6-channel Melq amp (also has the term DSET in the title) then you have created a 6-channel SET amp with built-in crossover points. Your first ...
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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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I got a forwarded email today containing the Lamm Industry’s release notes about their new SET amplifiers.
http://www.GoodSoundClub.com/PDF/LammML3.pdf The good thing in this is that Vladimir is still Vladimir and he did changed since the Rich ...
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[quote user="Chirag"] It seems the 6e5p is driving the transformer directly. I've used various versions of even simple mosfet followers to good effect at the headphone level, but never considered using a speaker level transformer. Did you and D...
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The value/type of the capacitor after the gas tube hugely affects sound. I made quite a number of experiments in past with those caps and I have no idea why it is so. Well, I hardly understand (and I did not see anyone who does) why the “gassed resis...
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Further looking at where I would like to take the new 6-chennal version of the Super Milq I am contemplating a new revision of my bass channel output transformer. Currently I have Jack Elliano’s made 450mA, large, single section LF transformer that b...
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In my post above I have mention that Srajan is in a way a brainless parrot that repeats the heard and has no ability of desire to understand what was the noise about. His comments that 6E5P and E810F are “close electrical” is a good indication how it...
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Hi Romy,What a busy year just gone! Finding enough time to just sit down and get the DSET's going has been impossible, but I have time now and have started the process.At the moment I am introducing some high voltage to the first amplifier chassis, ...
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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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Celsius, I do not know what CCS you impended, did you drive 6e5p’s plate with constant current source? I also do not know/like 6e5p with battery bias. The only application that I find 6e5p suitable was the Milq-style bias with two gas tube driving ...
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Actually it the idea sounds good then the one stage Milq might be a radically simple:
No big caps. Not big currents. No service voltages. No forces cooling. Not gauges for plate current setting. Small and not expensive out transformers. The positive...
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[quote user="KOTriode"]Ok, I just read your "Melquides Remote biasing". This technic can not be duplicate in my amp due to DC coupling, the C3G (I dont use 6E5P) driver stage basically adjust the 6C33C current in the output stage. Just for curiosity,...
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[quote user="Ostblock"]Is there any technical reason that you use a 400V transformer to feed the driver tube?The plate voltage on 6E5P is only +200V. Therefore from my point of view, a 220-240V transformer would be enough.[/quote]Ostblock, you need t...
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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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Paul, don't get me wrong--normally I'm not choosing a tube by the power, but this situation is somehow special.There are very few tubes which have the right electrical parameters (gm, mu, power, etc) to start with. In thesmall tubes word one can glaz...
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[quote user="KOTriode"]Romy, in the contrary, it is very unfair to compare my 845 amp with the 6C33C. The main reason is the 845 amp used the best output/interstage transformer available, while the 6C33C's output xformer is pretty good but far from b...
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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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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="hagtech"] Stepping back a moment, I'm guessing this tube is designed for radar operation. Maybe in an aircraft. The spec sheet definately talks only about pulse mode of operation. Maybe it was a driver for a pulse radar...
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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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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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I did have the Déjà vu feelings about it as I felt that we had this conversation in past. Here we go – it was a year ago.
http://www.goodsoundclub.com/GetPost.aspx?PostID=4291That post has both 6E5P-E and 6E5P datasheets and they are virtually the d...
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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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[quote user="Chirag"] Well..my first question would be regarding the application. The big Melq tube is already doing the bass towers...is it not enough current? [/quote]
Chirag, I’m not planning to use this power amp in my system. ...
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Hi Dima,Thanks for your comments; please forgive the chaos of what follows as I have to rush!
Agreed on all counts - the dc bias point would need adjustment and monitoring; I supposse it depends on how stable the electricity is from the wall; anothe...
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Dear Romy,
I have been reading the threads on GoodSoundClub about your journey with development of the Melquiades and Super Melquiades amplifiers. They are very interesting to me. I am pleased that your purpose was to produce a particula...
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Ok, I made some further experiments driving this time my S2 driver from Milq DH DSET. The hell of the sensitively - it was too much. So, I went for 4:1 inner-stage ratio. The result was very successful and the amp looks like was able to get more...
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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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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 unshort the ...
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