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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="Romy"]why don’t not you try my 6E5P?[/quote]I didn't want to steal any of your ideas. Although, admittedly it was my backup plan. No question the 6ep5 makes for a superb driver tube. Had not really looked into who has s...
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I see, let me to explain how the this work all together the you will be able to make your own judgement. Let look at the functional purpose of the emails in there. The R1 resistor is a loading resistor. This is understandable. It makes sense to kee...
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Hi ShannonI think that Romy have it already on his pre-assembled Zarathustra on this topic's pictures: http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=1&postID=4121#4121and also here:on post #8http://www.goodsoundclub.com/Forums/ShowP...
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Some few 6e5p have black dull getter not shiney chrome getter. never been used and they still test normal. do they sound any different? ...
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Guys from a Russian audio site come up with an idea of MM corrector that I find very interesting, take a look – it is self-explanatory. The firs tube is Russian equivalent of 7788. The second is “my” 6E5P, though I would use 7721 – sounds better in o...
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[quote user="Paul S"] Given speakers that can be driven dynamically by single stage amplification, there remain a host of issues, and among those issues is color. Most compression drivers are color-challenged to begin with…[/quote]
I would agr...
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[quote user="Romy the Cat"]I was thinking about this: how come that driving 6C33C (in fact driving anything one can imagine) the 6E5P was very fine but driving 2A3 it was dull like hell. I opened the amp and tested all – everything was perfect but th...
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Dealing more with Sun Audio SV-2A3 kit it amassed me how bad the kit was. The guys made very cheap, in fact I hardly believe that this company has anything to do with Japan – it looks more like K-Mart level of amplifier. I heard a number of very posi...
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[quote user="floobydust"] 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. Yo...
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Funny, funny but those 2 47uf capacitors are the only eminent the worth to keep in this kit – they looks like very good polypropylene caps. I also a person who go uselessly go for chokes with high DCR not lover. Anyhow, I am not changing any magnetic...
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[quote user="Romy the Cat"]Celsius, I do not know what CCS you impended, did you drive 6e5p’s plate with constant current source?*1 I also do not know/like 6e5p with battery bias. The only application that I find 6e5p suitable was the Milq-style bi...
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Yes, I ma very enthusiastic to see what resume I will get. I would not use a single-stage amplifiers with low sensitively speaker. Low sensitively speaker and high sensitively speakers are different school of thinking in term of amplification. They h...
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This weekend I found some transformers in my storage and I put together the Baby Melquiades headphone amplifier. It turns out to be very cure little amp. It is 9'x9' but has all Milq’s incidents including the choke intuit supply for plates and t...
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Whoever implemented and experimented with my slicing of lower MF range by 3 channels (Upperbass, Fundamentals, and MF) know how powerful it might be. Changing loading and volume of each of the channels it is possible to write any sound one might ...
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[quote user="cb"] The bias voltage I get on the 6e5p is around minus 4.4v on both the circuits. This is with the inputs shorted. With the inputs connected to adjust voltage to 0.0mvdc, I get a reading of plus 0.4vdc. This is with VR1 set at maximum (...
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So what's wrong with the 6SN7, apart from the high prices fetched by good ones? If building a 2A3 amp for personal use, it seems a likely choice. I do not know the 6E5P, but I do love the tone of the 6SN7, and I especially like it driving...
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Since I know about a few ongoing attempts out there by different people to build Melquiades I would like to share with some of my observations regarding corrections, simplification and possible modifications of Melquiades amplifier.
Obviously you ha...
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[quote user="cv"] I see why you want those tap options now - essentially you want to be able to load down the 6e5p but still use all the secondary sections. There may be some frequency response variations in the ultrasonic range by playing the tap ga...
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Now I re-listen all the things the we try to measure. To surmised everything I have to tell that Dima’s way to looks for optimum operation point of the tube (setting balance for voltage vs. current sufficiency) turned out to be very successful as I d...
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That's very interesting. Looking at the Melquiades i've always wondered about a few things. If you don't mind, i will ask you about them:1. If you think gas regulators make sound of 6E5P so nice, didn't you try putting gas regulator tube in the grid ...
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[quote user="darkmoebius"] I would never just jump in and attempt to build the Melq (or any other amp) without months of studying the design … [/quote]
Good motivations. To simplify everything: the Melquiades was at attempt to make two stages, capac...
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Allo I tell you what it is that's putting everybody off, it's that bloody input stage biasing arrangement... The other thing is that people who know enough to build it have probably read a bunch of stuff here and there, and therefore been anointed in...
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Hi Cat,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 Dmitry cons...
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[quote user="AnonymousUser"]I am thinking of launching into building or rather having buitl by a techie friend a pair of melquiades. Could you tell me more about the cost of building a pair of these amps? then how do they compare to other amps? I mea...
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Paul, I know NOTHING about pentodes. I looked at the curves:at 1500V/300mA/-85V loaded with 3.2k will give a whooping 190Wwith +/-85Vmax swing, staying in A1. At 2.4k this drops to 155W.G2 @500V, eating 50mA of current(!)But the linearity...???? The ...
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The headphone amplifiers are mystery for me. Form one perspective it should be simple but from another perspective I never heard any interestingly performing headphones amplifiers. Well, I have to take it back probably as wherever I even heard differ...
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[quote user="Antonio J."] 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 adjustment...
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Sorry, with me apparent alzheimer-inspired progressing dyslexia…. I’m keep confusing whatever is possible to confuse. What I meant to say was the 6E5P vs. 6E6P. The last one you have in DR version. They are essentially the same tubes with different p...
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[quote user="Paul S"]What is the "reverse engineering" version of an SET circuit that would accomplish - in terms of audible results - what you want? The reason I suggest 3 stages is only because I see a gap between required input and necessary outp...
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Romy:I would suggest not to store tubes under the bench in an actively used sauna. While the temperature alone will not affect them, the combination of heat and saturated humidity may lead to corrosion of the pins. Also many bottles are held to bas...
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