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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Yes, Roman: the two stages design is having the gain you correctly pointed-out.Sure would have paid - and it was discussed, as well, during pre-building weeks - to go for an higher gain design, BUT I feel more confortable in going ahead to play with ...
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Come on, Thomas, no one talks about the 75-85db of gain at MM level. However, the higher gain does has some things that I find is very useful and I find it is much worth to burn extra 15dB in prams then to have a preamp wide open and run photo at low...
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The feed from feedback goes directly to the grid of the second stage. So the left side of feedback resistor and 110pf cap are connected together. Here is the better drawing of of my final version wit elimination of the cathod cap in the second stages...
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I see the point, thanks a lot for your comments. Playing with the phono I've somehow come to a conlusion (possibly wrong) that my ham is an electrostatic air pick-up from the PS. During the operation both PS and signal boxes are very closetogether an...
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Hm, I kind of did not have time to continue this thread, probably I will. My initial idea was to publish my observation about all commercial and none-commercial phonocorrectors I have heard and to describe their problems. Perhaps I will return to it ...
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Not long ago I made an online remrark about a deluxe/"flexible" phonostage, opining that I would rather have mm-only gain and fixed input R, since I use a SUT, and I don't want the extra circuitry idling in the background. The manufacturer responded...
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I ripped my Cd player (to old to mention ) output stage and replaced it with SS J-fet phono preamp .I took RIaa components out .The dac puts out only 20mV so the MM stage with separate PSU and discrete J-fet regulators seems adequte for the job. Whol...
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TTH's ?By the way I've heard several 834's not just one. You are right though, I don't particularly care for what I feel is its rather obvious character.No ET magnetics either, hard to find/hear over here. I think a just handful were sold...
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I am now involved in incredibly interesting project (tell you later about it what have firm result) where I need to use a between stages a cap that cares 1V and practically no current. The best film caps that I tried were 100V-400V and they actually ...
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Not exacty a direct response, but I have wondered for a while now if having good electricity as a starting point means one could benefit from simpler power supplies. I mean, how many LCs does one need , given perfect, quiet AC to begi...
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First order of business is to sell them at a high price; so, if their approach and their spiel seem familiar...Again, this sort of "balanced", "ultra-low-noise" circuitry has been around in the pro sound market for a while now, but NOT for phono stag...
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HP means high-passing, right? In Melquiades I do it by changing the coupling cap between the stages. You can do the same in ML2. To unsolder the cap from ML2 is pain in ass but you might juts clip one of the lead and solder another smaller cap next t...
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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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Yes, you are right, I forgot that it is mono PP radio. I such case one ECL82 triode is driver stage and one is phase splitter. Here is a full cur cut of the radio. There is nothing special in it – a very typical circuit. http://www.goodsoundclub.com...
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Yes, the people in the beginning of the thread were right – the DHT two stage solutions do sound more interesting than one stage amp. Still, it does not suggest that if I have 12dB more gain on my single-stage triode I would not be able to load m...
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[quote user="Paul S"] Didn't you first become aware of MF "problems" when you got everything else working better via the PP2000, and the MF wound up dropping back to weak sister status with respect to system-wide PP2000 benefits? [/quote] The PP2000 ...
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N-set, a friend of mine built an amp with this monstrous USSR tube. It has 3 stages and the GU81M is driven by 6C33C.Within context of driving mid or high sensitivity bass drivers, this is all you need. In comparison, his previous SET with 6C33C soun...
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What is the "reverse engineering" version of an SET circuit that would accomplish - in terms of audible results - what you want? The reason I suggest 3 stages is only because I see a gap between required input and necessary output for the proposed d...
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[quote user="Paul S"]What is the "reverse engineering" version of an SET circuit that would accomplish - in terms of audible results - what you want? The reason I suggest 3 stages is only because I see a gap between required input and necessary outp...
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Maybe the best way to think about the X/O is that one way or another, it's effectively part of the amplification chain.Don't the "2 stages" in the Marchand include offset for X/O losses? Sure, if the X/O is interstage, then it will need to clean up ...
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Paul, electrical engineering has as much to do with Sound as pimples on my ass with craters on the moon :D ! I think I understand our confusiona: you've probably seen some earlier circuit perhaps with one big 700V or 800V choke-input supply and then ...
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I'm sure there are many bad implementations of the 845 and 211. Almost all of the commercially available ones are pretty mediocre. However I have heard good examples of both so I know it can be done. I've yet to hear an impressive 6C33 amp so it...
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Just the symptoms caused by the bad electricity, tons of tubes and other parts in various stages of decline, pins/sockets/connections, along with analog and digital source issues is the stuff of madness. I am so happy when everything works...
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"Indeed for classical work I often find a slightly under damped bass response to be emotionally evocative and of benefit to the illusion of the acoustic"Have you looked at the primary cause of this issue with most SET amps? I can tell you that ...
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Adrian,if it all true then I think the best configuration would be to have something like VPI one-side cleaning machine juts for sake of torturing of records and vacuum-collecting the residual or the torturing. And they to have the something like Nit...
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[quote user="Romy the Cat"]The sound of Vienna is sliding off tonality like it would do with a record playing that has problems with disc stability.[/quote]In another thread on binaural beats, you said, "... next to my Lavry Gold I notices that Pacif...
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It is come to me that something is not right with sound that I get from the New Experimental Sansui TU-X1. The “new” TU-X1 better tunes to stations and have better noise butt it has slightly less interesting tone then my old Sansui. You know that...
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Hi , Wojtek !Of course , I have some ideas how to modify this tuner , but before doing it you need to check if it operates correctly ! I mean tubes health , power supply operation , DC voltages on testpoints , LC tanks alignment , etc . You see ...
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[quote user="coops"]Romy Hi, Ralph installs every pair of speakers ,I know that it can take a week or more to install and optimise the larger systems. There are plans for amplifcation , he is working closely with Mr Park of Allnic Audio. M...
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Hi Romy,Great site!!!!I`m in the early stages of designing a horn system and have been unable to find any info on thesubject of boxing in horns leaving only the mouths exposed. Is there anything about doing thisthat would cause degredation in th...
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