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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I do not think Genn is close to an answer, he spent too much time to read the Lehnitsky’s brain-massage that made him to feel this way.
I am sure that there are some kinds of very pragmatic, predicable and manageable explanations for the effect that...
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decoud - thanks for the link, nice and minimalist,but as minimalism is no longer part of this project I need Unfortunately a more complex power supply.Romy -I'm building a full range amp. But...I need a small foot print so it will be high and relati...
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I find a house that looks like might be an interesting deal. It is more pricey that I initially thought but it has own interesting moments. The house has a nice near 700sq feet near room with cathedral ceiling that is built atop of double-car gar...
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Totally disappointed today, while I was listening to music, the left channel make a small pop and quit. The bias meter showed about 25ma bias instead of 200ma. Test the tube on bench showed that the tube current stay about 25-50ma max. This tube is g...
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I never had any fuses in my amp and never had any need for it. I have a fuse at my DHT channel as the tube is rare but not on the 6C33C. I do not really understand the problem you have with current. You have the meter that shows you current in real t...
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[quote user="tuyen"]This is my current 4-way GOTO setup. I know it is in no way optimal but I am interested to find ways I can improve it's layout.
GOTO SG-38WN woofer in 360L onken cabinetGOTO SG-505TT mid-low driver with Azurahorn AH-160 ho...
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I have been working on curves for tractrix horns based on data generated by HornCalc software. I configured the software to give values corresponding to radial sections for every 10mm of axial length of a horn nearly 1 meter long. When I plot the cur...
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Well, I decided it was time to start using some "proper" interconnects between the preamp and DSET's, ordered them and had them delivered. To date I had been using cheap interconnects from the local electronic shop (literally $6) which should be ok...
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I wish I could stop the US government from selling AK47s in any corner shop in the US. If you give a monkey a gun, most probably he will shoot himself. If you give a monkey an AK47, well that is different. He will take anything he wants and few thi...
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Experimenting with Decca carts, I've temporaly disconected the SUT's and decided to check the RIAA calibrationand I think I have some (circuit?) problem.[quote user="Romy the Cat"]
In the end of everything I was able to get very nice response. The...
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Yes, Jessie I have thought about it as well but whatever you do with 40Hz horn you end up with horn talk with each other. It is very simple to measure – use one as a transducer and put a measuring dB meter across the VC of second driver, treating...
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Romy, thanks, as usual, you seem to have been right. The system is on and I just checked V2 voltage; its way off, above .4VDC, so I grabbed a hot pad from the kitchen and rocked the V2 tube. The socket made the familiar a dry creaking sound and see...
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You should take care that you do not daisy chain the ground leads. Refer to following text.From my perspective, you should treat the L and N leads as one type of circuit and the PE as a separate circuit. Electrical codes, rules etc do not insist tha...
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Jessie, current is mentioned repeatedly because in the case of DC, and in this situation, the current is actually what one wants to meter out. Lamm just gave us a simple way to take a reasonably stable, real-time "measure of current" at this poi...
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Adrian,
when you comment that “live broadcast is simply dramatically more alive, more dynamic, more involving. One cannot help but be drawn into the music emotionally and begin to think immediately about the compositional structure” then did you mad...
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If you have a huge 2 meter long horn and like what it does from 70hz to 300 hz that is a very difficult range and really simplifies (ja) the rest of your channels.
Having a horn to play from 300-400 hz is not a big problem or a big horn, a handful o...
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[quote user="decoud"] If a magnetic field is static, who cares how it is created? Isn't the main potential advantage of electromagnets one that no one has explored at all - the possibility of modulating the field strength in direct response to the au...
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That is the thing exactly, my upperbass solution has the same output amplitude as the compression drivers I am using, IMHO resistrors are the devil in xovers, they kill all sound. Now the difference between 109 db and 110 db can be overcome with c...
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Hi alex. Sure the 12 incher starts narrowing around 700. But the horn does too. And in that area you cross both at -6dB. which contributes to narrowing vertically. The magic is, to merge in a way that off axis its not getting too odd in a complex sum...
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Adrian, Romy, (Dima), First, I most certainly agree that the textbook operating point for the 2A3 is not optimal and can be improved on, hence my own design from a few years ago. If you are sticking with a 2.5K load, you will simply not ge...
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[quote user="Bud"]Yes. Their is a direct correlation between surge current and dielectric materials dielectric constant. The voltages in question are high enough to use a thick dielectric material and just as with the effective resistance of the capa...
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priviet. I tried many ways. I cut the front outside faceplate open, and put a second driver on it. So that two drivers were firing onto each other face to face in one single hornthroat, rest normal single K. To my surprise the output didn't increase ...
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[quote user="Romy the Cat"]There are no good ready to go transformer for 6C33C. Tangos are garbage. The 20 years back Tangos were OK for small tubes but Tango is long gone and whatever crap they label by Tango in fact Chinese transformers agglomerat...
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I thought the B1 was Yamaha's V-FET and the B2 was a later "hybrid", but I suppose both are Vintage Sufferer's wet dreams. I have never heard either amp, anyway.
Yamaha B1 and B2 conceptually the same amp. B1 is made only with one polarity V-...
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Hato,Its very simple, and can be done without opening the amps.If you receive the manuals with the amps, you will find that they include clear instructions for voltage selection.If not, do as follows:There is a voltage selector built into the IEC soc...
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[quote user="Paul S"]N-set, I've seen and done plenty of all-concrete construction, including floors and entire roof structures, standard, pre- and post-tensioned, and also shot-crete. Ironically, concrete itself actually gets stronger over time, fo...
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romy- i have resisted using RTA for the very reasons you're citing-- learning to read the visual data, as well as methods of how to get it accurately, are as equally time consuming as any other pursuit in audio. anyone can be a reade...
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The last nigh I tuned the playback and witnessed one of the best sound I had. My playback ordinary doe for but this time it was like last winter – it was way beyond anything ordinary. Obviously the electricity was the factor but this time I was armed...
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[quote user="George"] The remote is not a problem. Using a Xantech distributer, repeaters, and electric eye you can configure the two passive remotes in a foolproof, or nearly foolpoof, manner for about $75-100 total. Since I already had the basic Xa...
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[quote user="zztop7"]Once you have all these contacts come-up with a concrete mix, let me see it if you would like my opinion. I will let you know if I agree or disagree & possible improvements.IMPORTANT: Is this an existing room? Is this room ...
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