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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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and I hope it will be up to the level … of FM in term of enjoyments. Anyhow, the phonostage is the already pack up in the chassis and running. I dropped the B+ supply to 270V and the R1 restore to 120K, keeping the 100V on the first plate. I can’t wa...
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I was playing with new power supply over this weekend, trying to optimize everything. First I got rid of bleeders at all B+ - it has enough critical current with them according to my measurements after the bride. All supplies after the first ...
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I am having a LOT of microphonic trouble with the 7788s in a high gain stage. I run a 40mV input signal into a 7788 triode at 15mA CCS. Plenty of gain, nicel output. But dang, if I bump the tube or board or chassis, the grids inside...
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I have noticed the same kind of control and "density" of sound from KR audio amps, which are zero feedback. Have you tried this brand of amp? The one thing that I can tell conclusively about the two different amps is that neither one suff...
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Well, this certainly shrinks chassis size, if nothing else. I've never looked at the circuit, but there has to be some sort of transformer function at each end, up and down, and the easiest way to do this would be with transformers ;>). ...
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Post #8:
Pics
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by
cb
on
2007-10-25
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Hi Romy Here are a couple of pictures below. The chassis is 18mm mdf and the copper plate is cut from 0.7mm roofing/cladding copper sheets. Nothing too heavy attached the on copper plates and it seems to be ok. No fan for cooling, so lots of hol...
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Jarek,I would start at the beginning. Turn off and unplug the TT motor, remove the phono cable from the phonostage and use shorting plugs to short the inputs. This takes the TT/cart/arm/cable is out of the equation. Do you still have the humm? If...
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Gentlemen, I can only hope to be wrong on the air-borne feedback.Actually your project Anthony made me think of coming back to my Staxquiades project - a Milq inspired monster amp for my Stax headphones. Do you have a source of big PSU Nichicons at ...
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Very nice set up. And yes, the HS-80 has a coolness factor, whether it helps the sound or not. I did a double-take when I saw your motor with all those green digits. Then I read what you did.My RY-5500 came with an external 120 V to 100 V step-down p...
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Anthony, I asked because I could not gauge distance from the tube pins to what I took to be large inductors shown straight underneath them. Distance will do it, but I think the critical distance will vary, depending on the strength and "pattern" of ...
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What problems with the Johnson sockets are these trying to solve, again? Would they really be better overall than a lower mass design along with chassis through-holes, like the ML2, etc.? If a reader is using these, do they appear to better stabiliz...
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Since there is no hard and fast "rule" about patterns for grounding electrical circuitry with respect to a circuit or circuits, per se, it can and does happen that chasses or parts of chasses/circuits are not grounded along with the "main" circuit, i...
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I have owned a PurePower 2000i (prior to the company moving its production back to Canada) and while it had a positive effect on the playback it created more issues than it solved with its noisy switching recharging circuit and the internal fans. The...
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The fullrange Milq will be built in an oversized chassis with the intention of adding maybe two or more channels down the track and perhaps some line level crossovers. So I will up spec. the mains transformers so they can handle a larger draw and wi...
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It is not a fear of forced ventilation per se, rather a fear of dust permeating the enclosure. You may have noticed that the power supply chassis' have been designed without ventilation holes on the 'roof'...this is to eliminate dust-fall into the i...
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[quote user="Romy the Cat"]Ok, let dive a little bit further into my examination of the subject of Lamm ML3
What is important is to undusted that my view less targets the Lamm ML3 but rather it targets the ML3 as a representative of entire cla...
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[quote user="Paul S"]Romy, doesn't Tim de P also use this cool Miller capacitance idea in his never-mentioned "high end" tubed corrector? Also, do I remember reading that he runs both channels through the two halves of the same twin-triod...
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Paul S wrote :
"...my wife would shoot me if she knew I was thinking of using the art as room treatment..."
My "wife" (we are not actually married) is an artist... A while ago I had the idea to stuff the chassis of her paintings from the rear s...
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Got today a December 2010 PS Audio Newsletter with an announcement from Paul McGowan:
“…So, in January 2011, we will release one of our secret projects that have been in the works for two years now, the PerfectWave P5 and P10 Power Plant...
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My Dear friend Romy,Indeed it took me a very long time to decide upon regulate or not. I ended up with regulation option to save some chassis space and weight, otherwise I would need at least 10 kilos more and 30% bigger space that would make the who...
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Romy wrote:"...Since in my new house I will have no room height limitation I am consenting to replace my 250Hz tractrix horns with 200Hz exponential horns...""...I would like my Fundamental Channel to employ 170-180 Hz slow-opening horn and to use a ...
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This is what I try to stick to: Try to create closed magnetic (steel) loops around magnetics. Ideally acompany itwith closed electric (copper) loops. This I think Pieter has done that already for you, but,as Romy impicite suggests, double boxing will...
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I have huge AMCC800A cores for two such transformersand good winders with HV experience. I also have a lot ofquiality coax cable, good to few kV for the chassis hook-up.Again, if somebody is willing to take care of that, I can lend.I'm myself 3000km ...
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It is confusing, but the NEUTRAL is not only "referenced to ground", but in properly-designed components it is THE reference to ground. Too bad most commercial hi-fi gear splits any and all grounding, at any point in any circuit, between the ne...
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[quote user="Romy the Cat"]I do use some vintage elements in my playback but I use them purposefully. I recognize their strengths and weaknesses and I capitalize on the strengths only. I think this is the only sane approach I see; when some vintage ...
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There are a few manufacturers out there, Minus-K, Halcyonics, Vibraplane...The Vibraplane is a good unit for the money, I have no problems with it and it does the job the way it should.Those Vibration units work different from construction and are ve...
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I think when we are taking about the today TT we do not mean inventions – there are no inventions that I see in mega-priced turntables. All that I see are small manufactures, very inefficient production, very little market for sale and distribution a...
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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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The ideal "star" grounding plan is seldom realized in practice, for lots of reasons. For one thing, it takes serious concentration to really think it through. As I have said many times, it is often useful to have a "bleeder" on the chassis, and this ...
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How great it would be if there was some kind of "breakthrough" every so often, in order to make linear "progress" with the driver evaluations and speaker development! In fact, it is almost impossible to keep meaningful "controls" in place between eva...
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