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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="JJ Triode"]Romy,Try running the left and right signals from the stereo arms, one at a time, into the known-good mono phonocorrector. If the problem is not present then you know the stereo corrector is to blame.Are both left and right ch...
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Besides the single driver Aporia (which I haven't heard) I don't think Silbatone has made any speakers. So they don't 'employ' GIP drivers. I think GIP is a separate Japanese company who have just been invited to participate at these German show...
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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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[quote user="JJ Triode"] It is about the bogus notion of choosing colored components such as to try to make the colorations cancel. [/quote]
A correction would need to be offer. It is not “cancel” but to mask out and only in context of ignorant list...
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[quote user="KOTriode"]Romy,The normal bias for the Golden Grid tube for 200V Plate at 200ma is about 70V-80V for the good tubes, the bad tube read 0ma at this bias, when drop to -30V it start reading some current, but can't get to 150-200ma current ...
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Romy, I have some (strong) opinions on DHTs concerning filament supplies versus specific tube types. For virtually ANY 45 triode, AC is my preferred option. Still, not all 45 triodes will be acceptable for my use, hence weeding thru many of them to ...
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Lamm juts announced the “Wold Premier of Lamm ML3 Signature single-ended triode moonoblocks” at CES 2008. It will be paired with large Wilsons in 2500sq feet room. To drive 95dB sensitive speaker with 32W in 2500sq feet is a sizable task but it will ...
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Romy, I did some models using a 400V supply and a 6K OPT load. It's easy to get 4 watts output in this configuration, but using a 2K cathode resistor results in higher distortion and a weak transfer curve. Plate dissipation is around 11 wa...
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http://app.audiogon.com/listings/omnigon-full-function-tube-preamplifier-phonostage
Looks like a serious effort that has been kicking around for a while.What tubes are used? Are they twin triode, like 12AX7 or - more likely - 6922? Both t...
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[quote user="drdna"] Romy the Cat wrote:I propose that soundstage is a derivative property of compression. Stripping compression destroys soundstage, increasing of compression makes soundstage more tangible. Yes, I have no argument with anything you ...
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The mini skirt analogy is a great fit. That is my experience.Or maybe like that stunning girl has small breasts and one has know the joy of a good handful. There are ways for enhancement and while one could get more, the girl is no more beautiful and...
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Yes, the last 3 pics are of the "dead" 2A3. Saying it warms up could mean two things... it literally gets warm and nothing else as it may have leaked air. Or it could mean the filament lights up (and assumes getter flashing still intact which i...
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Romy, As you're planning to run a 6K load, you can run less current without the transfer curve suffering as much. So, another shot at some numbers.... rather than use a RC setup to drop the voltage, Hammond (not my favorite) make an open f...
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[quote user="Romy the Cat"]In my upcoming DH Milq MF DSET I will have an Innerstage transformer and output transformer. The loading of output tube has known effect to harmonics vs. transients, it is know, it is predicable and it is manageable. The In...
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This subject does not bother me too aggressively as I recognize absolutely no sonic demands or listening temptations to change anything in my playback. However, there is a theoretical and conceptual curiosity on my part and I would like to learn what...
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So, it will be a single-ended triode amp and in future possible DSET, right? YesOK, but you need to understand that you will pay the “minimum proximity” penalty for this. Yes, this is something Jeffery warned me about, "Romy has that vertical thing r...
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[quote user="decoud"]For what it is worth, unless you are irradiating a concert hall, the SH50 is perfectly adequately driven by a 15W single 845-based SET, and I will shortly find out what it sounds like with a full range Melq. [/quote]Probably 15W ...
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Paul,Rather than go SS, perhaps you should consider push-pull tube amps for each of your five 92-93 dB-efficient channels (I assume "channels" means frequency bands, not HT5.1 or similar.) Along with that, consider using a modest amount of global ne...
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[quote user="Romy the Cat"]I do not know how the battery operation – I never was too warn with this idea but to have a small Solid State single-ended amp with put transformer sounds to me very nice. I wonder if anyone looks in this direction. I do no...
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"You need to realise that the physically larger a Transformer becomes the narrower the available bandwidth for a given construction. Due to the need to handle a lot of "magnetic bias" SE Output transformers become very large, physicall...
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[quote user="Merlin"] If there's one thing I hate about internet forums it's people postulating about sounic characteristics and possible failing in equipment they have never heard. [/quote]
Merlin, I was under impression that it is very obvious tha...
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[quote user="JJ Triode"]I'm sorry to say it, but I think Amy's large rug is too large. A smaller one, or better yet, two much smaller ones with some bare floor in between, is what I would play with.I also think you should recalibrate the channel lev...
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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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[quote
user="xandcg"]I would like to know, if you do not mind to explain,
since you cannot drive your bass modules using SET, why you use Solid State
amplifiers instead Pentode or Push-Pull Triode?[/quote]
Well, I need to say that I
never hear...
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As the writer of the above-referenced propaganda, I am pleased to once again tweak the whiskers of the cat.
First off, this is promotional material so what the heck do you expect? Every brochure offers a new benchmark in performance or it is not doi...
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[quote user="Brian Clark"] Whereas I do. deParavicini's worked on designs in Japan over several years and became familiar with the research going on there in the Seventies which culminated in identifying the HD decay-spectrum as a key indicator...
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There is an instrument-making in St. Petersburg, Russian, it call Kazitsky Manufacturing. Nowadays it is a typical post Soviet facility that has no interest but it has an interning history in context of Milq’s MF channel. The Kazitsky Manufacturi...
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[quote user="floobydust"] The main component that limits low-frequency response in any SET is the OPT. For these initial designs, I used the smallest Hashimoto SE OPTs... their H-203S for the 2A3 and their H-507S for the 45 which are rated at 7...
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The Valve Technology Milestone Timeline Courtesy to the National Valve Museum
1640
The first vacuum. Otto von Guericke's air pump
1643
The barometer first demonstrated by Evangelista Torricelli
1654
Magdeberg Hemispheres a d...
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I have the Zu Druid's which Romy has referred to. I purchased the speaker's based on the presumption that their high sensitivity and impedance would be perfect to run SET amps. After having read the great success Arthur Salvatore had running the Fra...
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