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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="misnacat"] FM is a large part of my entertainment be it the car, boat or home, My Accuphase T100 was checked over and aligned back sometime in the late 1990s by a local fellow that is now deceased.I would like to have my tuner looked...
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Keith,
I do not know why you go crazzy over it. All that is necessary is juts to mention that you are distributing given audio equipment and it would be it….
Anyhow, the Alnick RCL phonostage, the H-1500 II SE one, do you know anything about it? It...
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So, I have been looking into suitable valves to base a preamplifer around that are suitable for driving the DSET's. The pre must have a broad bandwidth, low output impedance, some current drive, and not be prone too easily to microphony. Oh, and pr...
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Who has had success with active amplification of very low level signals (like LO MC output), apart from Boulder 2008 and super-expensive lab-type equipment?It seems like the safest path (that's still reasonably affordable) for LO MC lift-off is a (pa...
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[quote user="Thorsten"] So, at least in commonly observable and observed terms and when used as intended the S&B line transformers are notably more capable at low frequencies than your LF OPT's in the Super Milq.[/quote]
I have no doubt but ther...
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Since I was wondering at Soundstage site I come across Marc Mickelson review of Einstein preamp.
http://www.soundstage.com/revequip/einstein_the_tube.htm
I am not familiar with this unit and but there was in there something that “attracted” me in t...
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I know that there are some people who would like to hear form me about my findings regarding the Singe-Stage Milq. I do not talk about it for a while but not because I do nothing in that direction. The decision was made to convert my 3 stages Super M...
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Why not tap the filter choke (the 1H ahead of the driver) ie use a 1H autoformer... given the gentle loading presented by what follows, it shouldn't mess up other stages, no?cv...
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[quote user="nl"] I have used Russian high-gm tubes like 6C45 in amps before, including single-stage designs very much like Romy's single-stage Milq. These have many attractions. However, in my experience it just didn't have the tone. Jim de Kort of ...
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Just like my idle mind to finally start wondering about phase (with the filter and the two stages). I think I remember you said you don't generally worry about phase: but most of us notice at 180 degrees.In case of such a serious problem, a seri...
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Hi Romy,Thanks for your response! I have never tried grounding the cathode in any of my tube projects. Even my amp output stages have been mostly cathode biased. But I am going to try grounded cathodes (and the +/- input stage supply) in my next amp,...
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[quote user="Resorob"]I realise that this is a very old post, but you might want to take a look over here=>> http://www.valvediy.com/simplexpg1.htmlThe article can be downloaded as PDF, the writer Ari Polisois developped a new kind of transform...
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Nope, if they said that it has 64dB then it has 64dB and I have no reasons to doubt. In reality the gain stages sum 84dB and 20Db is eaten by RIAA. I do not know how they got from 3 stages of
6SN7
84dB but if they claim that the...
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Roman,[quote user="Romy the Cat"]Nevertheless, if that bass was truncated between the stages then the devastations are way more severe. [/quote]That may be so, however an LF response of less than -0.1db down @ 10Hz is what is normally called "ruler f...
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Well, there are many full-function preamps. It is a common tendency nowadays to make an add-in board with phonocorrector to a line-function preamps. Recently even the full blown tube preamps use the j-fet phono-boards.
Interesting that I would like...
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But you aren't using the tube rectifier, are you?!?It will be interesting to see how you isolate your collective PS (and the other stages) from the DC circuit, and vice-versa.Best,Paul S...
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Having tried many types of coils nothing was as transparent as the NORTH CREEK 8 gauge air core coils.I do not think you will be happy with the JANTZEN or any other using a metal core.They are much cheaper than the NORTH CREEK and look better. I, too...
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PS caps, of course...I'm guessing I'll have about .25/second to make my assessment...Any luck with the APS on the phono stages?Best regards,Paul ...
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Hi,[quote user="Romy the Cat"]This subject of digital crossovers became quite popular during last few years and many audio-people give up and go for a simplicity and painlessness of digital crossovering.[/quote]Well, digital X-Overs would appear to o...
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Ok, now it is done and it is official as I see nothing available for conceptual improvement in the crossover circuit. Interestingly this version offers the most interesting sound as well, since the circus was tune for sound, not vise-versa, it is wha...
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Contemplating now how to organize biasing for 3 singe stages of my 6-chanls amp I was faced the dilemma: do I need to bias my tubes. The 6E5P/6E6P are Russian tubes and it means that are very different right from the boxes. The Milq, driver tubes, be...
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After a month of listening exclusively Melquiades and decided yestoday re-switch everything and to play Lamm’s ML2.
I was quite shocked with the result and I did not anticipate the ML2 could be so way off. I will not elaborate about the a...
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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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[quote user="hagtech"] I run the driver tube at 170V @20mA. I don't think you need to run this tube at high current. It is very linear with wide signal swings at this bias. [/quote]
Good operation points for use it as a driver. You might...
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Lamm introduces a new product, the LP1 Signature phonostage. Vladimir was planning to do it for a long time as his parley into “reference” series and after his from my point of view failure with LL2 phonostage.
The new LP1 Signature phonostage...
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[quote user="Markus"]Very interesting discussion. I have taken a close look at Marco's horns and am thinking about using them in a horn installation. I plan to use the TAD 4003 from, say, 1 to 8 kHz, and a tweeter above that.
I would love to use ho...
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[quote user="Romy the Cat"]However, you need to find out how much power and how much gain you need for you subs and your room. Borrow for someone any 6C33C and measure how far the 6C33C will be from class A2 at a level of max tolerable bass in your r...
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My project to add 3 one-stages channels to Super Melquiades look like progressing (it means I will have the new 15,5:1output transformers very soon) and in context of upcoming changes and, after long consideration and some tests, I desire...
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Interesting that a notion of an Absolutely Transparent Stage is kind of bizarre. Let presume that we do have an Absolutely Transparent, musically and sonically, stage. The stage might be transparent only with own enclosed scope. If a stage modifies t...
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OK, no one argue that FM is good BUT the cost and complexity to record doe FM is quite high. It look like that it might not be more simple – to turn your tuner, to turn your A/D, to tune your DAW and to record whatever you wish. Well, l it is surpris...
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