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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I am very much do not like the current state of my mind about the single-stage Milq. Let me to explain….
In 2001-2002 I spend some time trying to assess the sonic influence of PS to sound. After making numerous tests and prototypes I concluded that ...
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[quote user="Paul S"]Lamm did choose to use some of the driving ideas from his proven SET amp…[/quote]Yes and no. ML3 design wise, as I understand is, in fact is not as interesting amp and it might be otherwise. Vladimir went for the target marke...
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I do not see why substitute
between 12.1k and 12.0k would be a problem. This will slightly change the driver
bias and plate voltage as the result but the natural discrepancy of parameters in
the tube is very high and you shall be still within the ...
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There are some information about that new Japanese amps in the threads below:
http://www.audiocircle.com/index.php?topic=65312.0
http://www.diyaudio.com/forums/solid-state/37247-any-info-manual-about-yamaha-b-2-a.html
...
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[quote user="Romy the Cat"]
[/quote]OK, now, after mach thinking, consulting and very little actual listening I have finally conceptualized my next move with powering Macondo MF channel. Considering that I have some extra space Melquiades’ ...
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[quote user="drdna"] Not that the sound is bad, but my technique must be bad. Because sometimes during the day the sound will get really particularly bad, even to the point that it sounds like clouds are passing by over the music, if you unders...
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[quote user="floobydust"] The final ratings on later ST-style glass 45s was 10 watts on the plate and 300 volts cathode to plate max. Recommended bias current is between 34-36ma max. Short answer... I prefer no more than 34ma on the 45 cathode. I...
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[quote user="Wojtek"]has supposedly very nice Obbligato line of film HV caps . [/quote]
Thanks, the high nominals the have only 630V and they are larger than I would like to have. Does anyone know how those Obbligato sound in PS?
[quote user="hagte...
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Hi,[quote user="morricab"]As to the best transformers souding more transparent than the best resistors, I'll believe it when I (don't?) hear it. You claim to have heard this but I most certainly haven't. [/quote] Well, the claim is no...
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[quote user="hagtech"] Maybe you can do the same for the bleeder resistors and wiring bundles? That is, once you are sure it is operational. Wires can be like guitar strings. [/quote]
Actually I do some sort of things. What I am done (I’...
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[quote user="Paul S"]I got new 6C33Cs for V2s from Lamm because no one else wants to match them, let alone match them for gain…[/quote]
There is no meaningful mutual conductance or bias matching for 6C33Cs (in context of ML2) besides gain matching, ...
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I have to admit that I personally care less about powerful full-range SET amplifiers. I do not take their sound seriously, in fact I do not believe they are cable to do “right full-range sound” and what I see then I always imagine them with huge, bar...
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Thanks for your reply.
I have double checked everything and my VR1 is connected on the positive bias side. With the input shorted I get -4.2V on the grid and it stays the same after I unshort it and adjust VR1 to 0v. Yesterday voltage was dri...
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[quote user="Romy the Cat"]Rakesh,I think you’ve missed the accent of my battery post. We do not argue abstract topologies but we argue the validity of topology in respect to sonic results. I hope we all agree that we do not exactly know WHY affect...
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I made experiments running HF filaments from dedicated Hammond 6.3V transformer vs. lifting ground on my 6.3V IDH filaments. I did not listen Sound but rather measure the noise – the result was identical. In the best cases I was able to get 0.63m...
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Somewhere in 1997-88 I bought a hundred 6C33C. I believe during those years the where more expensive then now and I paid around $7-8 per tube. Over the years burning the 6C33C in pair of VK-60 (8 tubes), two pair of Lamm ML2 (ML2), ML2 with Melquiade...
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Sorry Romy, i can't tell you about life longevity of 6E5P in my amp 'cause i'm not using them there anymore :)For my speakers two-stage SE sounded much nicer, more balanced and clear with more volume. Well at least it was easy to predict, considering...
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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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I see now. Quad can’t be driven by single 6C33C. This is well know fact and I did a lot of experiments with Quads and Lamm ML-2.0. For whatever reason as ML-2.0 drives Quads it produces Stingy Sound. I can’t explain it but it is not the sound that ML...
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[quote user="Romy the Cat"] anthony wrote: Then
the AC-DC conversion on the first floor, filter caps and output transformers on
the third level with the amplifiers sitting proud on top. I don't want to
see any caps or transformers...just valves.P...
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So I am currently working towards this concept for my Macondo (see below) and I have just the Upperbass horns left to turn and prep. I am thinking about how to best integrate the DSET with Macondo and have come up with something like this… Perha...
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Allo,Well, the divider may certainly be responsible for some softening of transients - in particualr, what values are you using there?Also, the received wisdom is that silver micas are created far from equal; no experience with them myself but I beli...
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Tubes came today. [quote]solve the problem of what we should test for[/quote]I don't think you can get one tester to do everything. Not only does one need the basic parameters such as transconductance, but you have shorts, gas, leakage, m...
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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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[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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First, Adrian, Thanks for your feedback on the newer designed 2A3 tubes... very interesting. I've looked at all 3 of these brands before but have not as of yet purchased any (I have a large collection of 45 and 2A3 of various NOS US brands...
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Adrian, Fair enough... it's not about power or gain in your case, just making it sound as clean as possible. Well, if you go back to my earlier post on findings, I list the basic operating values. Just to recap them here:Plate supply ...
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Romy ThanksI had 6 pure power (230v version) since 2017 and now i have 4 pure power , the first pp3000 was faulty and it has the same problem that some users reported here (GSC) , the output frequency spectrum of first PP3000 had some extra harmonics...
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In the past month I have been playing around with a sub-woofer. This is my first experience with a sub. Prior to this, I held a bias that subs generally cause more problems than they solve. I am using a sub now because the main horn...
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Mats,
Actually I do not exactly understand what you are trying to accomplish. The Altec midrange after 4uF will roll at 3.5kHz-5.0kHz, depending of the type of coil you use. If you cut the MF channel so high then I would ask why you do so and why yo...
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