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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Well, I think it may be something like Tominari of Dynavector used to do with his Phono stage a while ago. He considered the cartridge as a current source which sorts of 'unloads' it. http://www.dynavector.com/products/amp/e_pha200.html...
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Alex, as I wrote I use Z-foils at the primaries of mu SUT's. I'm not sure if colder is the world *I* would use. I'm after immediacy and transparency and this is what they gave me. Also widening tonal discrimination, hearable esp with solo piano. ...
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I load my 901 with 42K that behind my transformer that makes it 68R. It’s given that I always tend to load my cartridges slightly harder: have my reasons. I would suggest to load 901 with ~80-90R. The load of 510R suggests that something is tonally/m...
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I'm picking this up from the "Living Voice Loudspeaker" thread http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=2&postID=11765#11765and placing it here, as further discussion will take us off the original thread :Romy wrote :"...I reme...
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Final exit ~ 1M x 2M crn loaded (yielding 1/4 given mouth cut-off frequency)With 416's bass can be devastatingly spectacular !The general public have no concept of the efficacy of large bass horns...
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Hi everybody, after reading RomytheCat's Macondo Setup I am very impressed ( phantastic music room ...) . Presently I have no working horns ( they are boxed), just questions.
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Scott, I'm guessing the installation shown in the photo makes lots of LF, but how does it provide balanced, "free air" loads on both sides of the drivers?Best regards,Paul S...
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Romy, I'm of course familar with your MF design and Jim's 6E5P curves is what I base my considerations on at this moment (along with the corresponding Spice model).Your DHT MF is quite self-balancing due to the large cathode resistor. WhatI have in m...
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Hagtech, why not??? VR's are sensitive to parallel cap, as they have intrinsic esl (few mH). choke will increase the ac regulation.Of course it must have enough DCR (or R in series) to give the static voltage drop (giving e.g. some trace of line regu...
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[quote user="DHT4ME"]Romy if you feel that you are not loading the tubes enough put a 16ohm power resistor in parallel w the S2. this will cut the load line in half. It should be less wiry and stronger more weighty sound. Obviously you might experime...
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The LL1627 is fine but it has core size limit. Lundhal is a fast and you might have some “extra” inductance with it as it will have “enough” HF for your transformer. If you have Lundhal then stay with 220mA and the inductance whatever will be left o...
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[quote
user="JOHNR"]The common mode noise will lie between 5 meg and 8meg or
8 meg to 12 meg depending upon whether it is forward or backward mode
working.
It does not have much to do with the
30Kilohertz. [/quote]
The normal common mode no...
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[quote user="Paul S"]HE, you've gotten a long run so far without anyone asking if you've read the site. Have you? There are long threads on the Lamms and the Lowthers that might offer you some food for thought. One thing I would recommend is playi...
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Consigned to the root cellar? In such a small space, "cranking it up" is a relative term, but I think this could be more interesting than headphones. Anyway, there's no substitute for trial and error. I would say, basically, use a good front end a...
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Keep the driver stage, the 6N6P, as new as possible. This tube is very critical for the given amp. You might get a tube tester and measure the mutual conductance but with the low price of 6N6P I think it is hardly necessary. I would change it as ofte...
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[quote user="Axel"] I was hoping to get some specifics from you when looking at a BEST "impedance match" ~ 1:1 with the cart in use, and if you had figured out some ball-park value which then can be used as point of departure for listening test.[/quo...
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[quote user="Axel"]In my case I got more resolution with primary loading, BUT it gets very quickly too bright with even small changes, sounding all wrong. The 18k on *secondary* sounded fine, but was missing some more detail that I know from connecti...
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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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First let me say I am NOT trying to promote the Synergy horn. I just think it is very intresting to look at and to think about.Ideal loading only occurs at a singular frequency within any horn. This ideal loading point is where the length is 1/2 a wa...
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I have coved this subject in past. I was not able to find a solution how to add resistors to change loading and how to make it to be switched that would not degrade sound. So, my own phonocorrector has no adjustable loading. If I need to do it I woul...
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First of all, thanks for additional detail. As mentioned I can speak only for my Fidelity Research XF-1 (30dB). Loading it on secondary as you mentioned, it ALSO damps the trannie - result in my case: less resolution. Primary loading is MUCH more sen...
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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 Innerstage transformer might ...
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***The proper loading value is difficult to say without knowing your system, as it is partly a preamp and ultrasonic RF issue as well as one that involves the cartridge and audible frequencies. Some cartridges have frequency abberations within ...
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Alex, a cartridge loading has no “right” absolute value, it has of courses a certain fork of right values but to loading of a cartridge up to one of a few Ohms would be depended from many parameters, in some instanced unexpected. In my hands, used as...
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Right, so it is. B U T it seems not the case, that the final load-value the cart sees is the same with non-SUT, as is the case with an SUT. Unless your experience is different - therefore my question. If you look at Lyra's recommended loading specs i...
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Robert,your view somewhat mirrors that of Linn when they introduced their Isobarik speakers. In the almost 30 years since then, the theoretical understanding of isobaric loading has improved. What it does is to double the moving mass and the motor fo...
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[quote user="Frode"] It seems like they are ending their sale of horns to the DIY community. Also, some people say that www.azurahorn.com are closing down. Not good news![/quote]Which brings a very interesting subject: a huge failure of horns-industr...
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Yes, CV, I thought about it myself and I fine that this might be VERY interesting to play with. Unfortunately, or fortunately, I am months away from the position when I will be able to do it. The subject is devilishly interesting however. I think it ...
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Manufacturers do not recommend any specific loading, and it they do then they shell not do it. They recommend a region where most probable final loading value might be. In case a transform is use it make not difference; they just transfer impedance i...
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[quote user="Romy the Cat"] I do not know if “stupid, indiscriminative mass loading is a road to nowhere”. [/quote]Let me try to explain why I think so. Adding mass (e.g. sand+shot loading of steel profiles):1) makes the vibration amplitude smaller f...
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