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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The amps must be broken in now; either that or someone may find me starved to death listening to Music. I never imagined I could get Sound like this from my DEBZs, but the MA-9S2s are doing wonderful Sound via the DEBZs, with all sorts of music. Ob...
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Today I listened to a CD dub of early Etta James. Not to speak of the quality of the recording, but it is good enough to hear that Etta sings right up on the mic, and the mic feed is treated to some reverb. I had the volume set at "15", not very lou...
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Hi Romy, Your amp schematic is intriguing. I have a question about the dual supply for the input tube grid bias. If my preamp uses an output coupling cap, do I need plus and minus supplies ? The interconnect will be biased at the sam...
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I made some power measurement of the Super Milq, to my surprise it is not so much hungry east as I expected. During the startup, what the B+ begins to charge the large capacitors the amp sucks 8,6A. When the amps is fully charge, heated and in it cru...
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I chose the 170V point as midway between the 250V supply I had for the CCS plate load. The choice was for maximal signal swing in both directions. [quote]in a properly designed amplifier a transformer should clip before the active stages[...
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I do not remember details already but Dima and I had the same discussion a few weeks back. After all his research he was very much disagree with textbook use of 2A3. He felt that max power and the most proper operation of this tube will be at 275...
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Paul Excuse me for off-topic , I also have high power solidstate amplifier and I have some experience with high power solidstate amplifiers.Actually very few high power solidstate/Hybrid amplifiers are good and most of them are not ok.The problem is ...
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Continuing the thoughts from the post: A powerful full-range SET? What a bogus idea! What I would actually would like to see is the industry not to furnish idiotic loudspeakers with granite drivers and then trying to push high power SETs to drive the...
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Scott, my apologize, but issue of low-power does not have any relationship to the problems, you have described. The problems could be located in the following areas:- high output impedance of the last cascade, and amplifier in g...
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Paul. GSC = goodsoundclub I have worked with Richard (pure power owner) and i know the problems of customers but i think paypal is a good way to shop from Richard. Ask Richard to send you video from the unit before paying to him. Recently 3 or 4 pure...
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Tesla Battery -> Tesla Inverter -> Purepower 3000 -> Audio System
using Tesla powerwall inverter before Pure Power , any experience? any idea?Thank you in advance...
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Well, in context of a full-range speaker, like largest Wilsons or the similar, the answer would be unquestionably no. Even if we biamp those speakers then the LF still is too wide bandwidth and too geographically bind to the MF section. The wor...
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Paul,
Ok, I would agree with this. The power handling is the factor that I forgot to mention. The Japanese home drivers are rated for a few watts vs. the pro driver are rated for hundreds watts. BTW, some of older pro drivers (like my Vitavox) wer...
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Consider a triode connected 13E1. 95W dissipation, will probably work beautifully with the existing OPT if you adjust the gap down and if you can rewire your arrays to present a somewhat higher impedance.Something like 400V-450V / 200mA-ish will ...
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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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[quote user="Romy the Cat"] There is no aspects of minimization
of the inductor size. You can go to 30K, or 50K, or 100K input LPAD. The LPAD (which
is not inductive switched attenuators with good resistors) anyhow sites behind
the filter, so the ...
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This morning I logged the mains power draw so that I can properly size the fuses.
...
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In regard to the noise issue I had with my Pure Power unit in the past, I never noticed it with my tuner or other components, but I mostly listen to the phonograph. In particular the Decca cartridges are incredible as antennas and seem to pick up all...
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Jarek, When you say "not 50 Hz hum" it reminds me very much of my troubles I had with my Pure Power 1500 -- (before it "blew up" and needed to be repaired ... ultimately replaced with a new PP 2000 plus by Damien) -- but in any regard, the hum was ca...
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Rectifier in linear audio systems draw high current at short time for charging psu capacitors.
I = Total peak current of an audio system at full load (current draw from wall AC)V = Voltage of main ACP = Total Power of Audio System = ...
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Rick, as I "remmember", the PP output waveform was a "perfect" squarewave, in terms of shape, but it's pulsed. And I think Romy said it worked with a load of up to 60% of "capacity". Does a different regenerator have to "work the same" to "sound as g...
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I have a long story about battery output and life not coming close to manufacturer's promises, but I will not tell it. Suffice to say, it may well be that you have a defective battery, as it happens all the time; or, it may be that your batteries do...
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Seems totally doable to me; you'd just need 12 and 5 volt DC output having adequate current delivery, and a few Molex connectors.
Having said that, I notice no difference when switching to battery when using a laptop model to run the external driv...
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I have one problem, probably trivial: when I shut the power off, the HV dies out much longer than the filaments,so the cathodes are poisoned at the switch off (on the startup I have a delay relay on HV).And this despite all that heavy bleeding on HV....
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That's a whole lotta Bidat you've got there, Romy. By contrast, I'm guessing the 1-box iDAT-44+ (not including its wall wart) is smaller than the box pictured above with the torroidal tranny in it. The torroidal tranny inside my...
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Dear Romy,It may be worthwhile to check what transformer is installed in your DA924 because Lavry did change over to torroid transformers from the laminated core power supply transformer. Also it is a good practice to periodically ship the...
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Romy, would you mind elaborating on specifics of your power supply? My Bidat is going to John in a couple of weeks and I am finalizing my thoughts. Thank you....
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Romy wrote:"...The leading idea is to bolt a triangular shape sealed enclosure juts behind the small wall that cover the load bearing beam from the midbass horns..."For a lot of reasons, I'd vote for an alternate placement. You've got that baseme...
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I think if you use Pure Power 3000+ it is better to use shorter power cables (2m is very good) . the bass and attacks are better with shorter Power cables.
you should not have any ground loop in your system if you use Pure Power 3000+. it is v...
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In recording, we have literally miles of wire with very low level signal - and still can get A level sound. Professional microphones use phantom power (48V). Maybe we need this for standard interconnects. I know of no experiments with liquid in any n...
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