0 Members and 1 Guest are viewing this topic. Read 16653 times.
Pure silver is 108 or 8% better. ..... One could just make the copper 8% larger and get the same effect.
Here is a table of conductivity that uses copper as a reference at 100. http://www.eddy-current.com/condres.htm(1) Pure silver is 108 or 8% better. When silver oxidizes it is still a good conductor where copper is not. (2) Copper oxide forms a rectifier. However this is usually not a problem with good plated connectors. Given that the resistance of most cables is almost nothing then 8% less than almost nothing is still almost nothing. One could just make the copper 8% larger and get the same effect.
Hi(1) Yes, copper does oxides easily. But silver does not oxide that easily under atmospheric condition. Silver 'tarnishes' pretty quickly with sulphur chemicals, e.g. hydrogen sulphur, in polluated atmospheric air. In common language, copper oxides but silver tarnishes. We don't call silver oxides but call it tarnishes.(2) Again, don't go by the book, please. 8% electrical conductivity alone seems no big deal. Pure copper can never touch the sound of pure silver even copper made 20% larger. I can bet. But with what I compared in depth the sonic difference before I jumped onto the pure silver wagon, I think it could be the molecular structure difference btween these 2 metals. Correct me if I were wrong. But sonically silver sounds so much better always stand. I have been using 99.9999% pure copper for my audio. But when compard to 99.99% pure silver, it craps out. Silver sounds so silky, elegant & dynamic that pure copper just lacks. Even when cranked very high SPLs, the pure silver interconnects I DIYed built maintain the integrity of the music micro-structure when copper already craps out lossing the music minor inner details, & sounds even agitating. Otherwise why should I have gone the great pain of researching & then building pure silver interconnects & power cords which do NOT tarnish (with the special 'recepes' I developed). Very pure Ag costs a lot lot more than Cu, my friend.May I ask you a silly question: have you even tried it out technically & sonically when you made such statement that 8% larger Cu will make the "same effects"??FYI, the most expensive audio gear in the world is Audio Note Japan, IMO. Its handbuilt flagship power amp: "Ongaku" (it means music in Japanese), is tagged for USD180,000 a pair of tube monoblocks.It is loaded with 'tons' of pure silver - silver wound choke, O/P & power irons, silver caps, silver interwiringthrough-out. I was invited to have a full-audition of the total silver loaded Audio Note audio system in itsregional dealership studio only last Jan. WOW! Were I rich & famous or what to get this life-time chance. c-JPS: are you still interested to carry on discussion of the "unconventional" design/build of my 1-tube 1-stage stereo phonostage?
(1) 1. I was speaking of the resistance of copper vs silver, no other quality.(2) It is well known that good ENGINEERING is a balance between cost and performance. Anyone can overdesign something, anyone can use the most expensive materials. (3) I have already stated the potential difficulties that the user may have in putting a single stage RIAA preamp in his system and pointed out their limitations. I am happy to have an open discussion on the matter, however this forum is intended to share information and Pontification does now sit well with its members as you can see. So far you have shared nothing about your RIAA preamp design other than the fact that you are in love with your own work. (4) It is not a bad amplifier but is it $180,000 good. Recent articles in Stereophile by Art Dudley and others have been pointing out the motivation behind expensive equipment is often for the "entertainment" of very wealthy individuals as an alternative to buying a winery or other expensive, flashy en-devour.
Hi Roger,isn't a single stage enough for a preamp...Why use a multistage etc?...kind regards George
Hi.Yes, the tube is 50-year old Telefunken ECC83s I am using in my 1-stage phonostage. You guessed it right.HV:- +440V (chip regulated)Cathode bias: 2.3V - using no resistor bias which sounds only so so. I have used a much better topology sonically.Surely no loop feedback type of RIAA equalization used in mult-stage phonostage designs.Now I believe you already got some good idea of the design.What do you think?Surely it needs an active linestage to boost up the low O/P voltge to 2V or so to drive any power amps.But as an audio 'purist', I prefer NOT to use any active linestage to screw up the sound quality. I tried to use it to drive my tube power amp direct & am very impressed by the neutral sound quality though the volume pot has to set up up.But who should worry about the volume pot setting as long as the volume is adequate for quality music.c-J
Of course, to me the best solution for too much gain is a passive preamp and for that I make "Pot in a Box" and active "Pot in a Box" for those who think a passive preamp lacks dynamics. For this (perceived lack of dynamics) I have no explanation. Whether the volume control "sees" a tube nearby or the first tube in the power amp there is no difference in my mind. Of course, the cable between has to be low capacitance. short and shielded. Perhaps driving the cable is the problem.
I find your comments about passive being good enough (and that people are hearing (or imagining) things in terms of a lack of dynamics) interesting and personally relevent. I have a powered ldr combined with my Ncore fully analogue, non digital, class D amps and everything top to bottom is amazing, liquid, knock your socks off, blow your wig back, including bass, ripped, defined abs of bass. Sorry I have no tubes for relation to this conversation, but my amps rock, and so does my volume knob. My experience with strong voltage source - battery powered ldr knob with no gain - top spec amps is out of this world. And, I'm not talking about loudness... at all.
...everything top to bottom is amazing, liquid, knock your socks off, blow your wig back, including bass, ripped, defined abs of bass. Sorry I have no tubes for relation to this conversation, but my amps rock, and so does my volume knob. My experience with strong voltage source - battery powered ldr knob with no gain - top spec amps is out of this world. And, I'm not talking about loudness... at all.
(1) Now Ralph Karsten feels that passive preamps are nice, but can never reproduce the bass frequencies as well as a properly designed active. As a huge proponent of passive preamps I respectfully disagree with his opinion.(2) In his opinion it is to control the interconnect. This means not only the ability to drive it, but to control the artifacts. (3) but the line stage itself will not have any gain and a tube buffered output.
I think it would be nice to share more of what you are doing. This is a nice start. (1) You might state how you have achieved the RIAA EQ, how accurate it is, (2) how you deal with the variable loading that a passive volume control presents. (2) I don't understand your comment: "Cathode bias: 2.3V - using no resistor bias which sounds only so so. I have used a much better topology sonically."