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Post by PinkFloyd on Mar 3, 2008 1:04:12 GMT
I'm surprised Merton hasn't already  |
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rickcr42
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Rest in peace my good friend.
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Post by rickcr42 on Mar 3, 2008 18:38:54 GMT
Rick Please explain to me how ensuring that BOTH of the differential pair transistors in the input pair, being kept within the most linear part of their characteristics can lead to a power supply improvement ? Surely that must lead to lower distortion than previously ?  Most likely better power supply rejection ratio as well. (PSRR) To be fair, though, you have never seen a mod like this before, as it is something that several of us in Sydney have been using with differential pairs since 1989 ! Leo can also verify that the mod really does work. Alex dude,trying to have a lucid conversation with someone who has consumed a 24 pack of "Winter Lager" and a couple of bottles of johnny Walkers best is..............  (looks over shoulder seeing Merton with his finger on the BAN HIS ASS Button and so slides quietly away to fight another day... ) |
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rickcr42
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Rest in peace my good friend.
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Post by rickcr42 on Mar 3, 2008 18:40:14 GMT
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Sol
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Post by Sol on Mar 3, 2008 19:53:23 GMT
As Merton would say..... I'm watching you two It's like tennis isn't it BLAMRickerooonee fires at the sideline with a dig at specs THUDAlex scoops her up and floats one towards the baseline with a challenging distortion measure SWOTBack she comes with a deft little volley suggetsing better sounding has nothing to do with distortion measures TWATAlex trys the knock out blow to the centre stage with the noise floor passing shot WHAMOOORick side steps and goes for the drop shot dismissing the nosie floor as he lines up for a slam! So will Alex retort with a "my Dad's bigger than your Dad" or will Rick resort to Alpha male and suggest "Yo mother's so big she was baptized at seaworld" Keep it coming chaps .. it makes the late night pass in India  |
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pagan
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Post by pagan on Mar 3, 2008 21:01:16 GMT
Why Ban or stop either of them?
An interesting and amusing discussion, and they seem to be enjoying themself's.
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Deleted
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Post by Deleted on Mar 3, 2008 21:50:41 GMT
Sol and Allan
Rather than get too deep for you guys, some of the heavy stuff has been sent via PM and email.
Sorry to spoil your fun !
I could post some of it, but I would have to delete parts, as some email content is best kept from public view due to the need for permission from other people to make their email contents and discussions with me public. Besides , Rick has indicated that he is not yet sober enough to absorb some of what was sent ! ;D
Alex
Rick
Don't forget to throw out the empties, and wash the dishes, before "she who must be obeyed" returns home ! Oh, empty the ash trays too ! ( or are they stubbed out in the cans ?)
Alex
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Mar 4, 2008 5:07:52 GMT
And the winner is ME, ME, ME! ZenTech! Sorry, Alex, I'm more on Rick side although I have to disagree some of what he had written ......... |
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Deleted
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Post by Deleted on Mar 4, 2008 5:21:39 GMT
XTRProf How can you possibly come to a conclusion like that when you don't have a clue about further private exchanges between Rick and myself ? ;D You simply don't have enough information at this time to decide either way ! Alex |
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pagan
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Post by pagan on Mar 4, 2008 12:30:02 GMT
Sol and Allan Rather than get too deep for you guys, some of the heavy stuff has been sent via PM and email. Sorry to spoil your fun ! Alex Alex I'am not interested in the private emails. But for me parts have been interesting. I missed out on the Valve days, came in just after the stage of transistors being expensive fuses, then the hype was fets... With the experience you both have on valves, it's interesting with the different views you have. and the limitations of the different topologies. |
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Deleted
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Post by Deleted on Mar 4, 2008 20:30:30 GMT
Allan
I had the benefit of regular visits to HI-FI shows, even one Interstate show , with a mutual acquaintance. As well as that, I was helped with the transition, due to on the job training with Semiconductors, just as I was much earlier with Valves. Perhaps Rick's and my own views would be a little closer if he had been able to spend money on so many new kits, including different types of amplifiers as I was ? But family comes first ! As I have said previously, we really are spoiled in Australia with the range of quality kits, and the large number of electronics stores, aren't we ?
Alex
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leo
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Post by leo on Mar 5, 2008 3:56:00 GMT
Totally missed this thread, I'm a numpty regarding vinyl so can't contribute bugger all towards it I'm afraid although I have heard a shite load of different vinyl based systems.
About 70% of them didn't do anything for me although the other percentage ranged from very good to almost fantastic
I'll set myself up with a TT sometime but I'm happy with my dacs so far.
I can comment about the mod on the differential pair Alex mentioned earlier, this certainly did make an audible improvement, I even tried linking it out so to make comparing quicker but in all honesty the difference was enough to convince me I didn't need to compare backwards and forwards.
It increased width and vocals sounded more clear with less crap on the edges
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leo
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Post by leo on Mar 5, 2008 4:08:38 GMT
I've also heard lots of valve amps, I actually have one I built from a kit which is currently sat underneath the bed as space on the rack is limited.
THE best amp I've heard was a valve amp but it was far from practical for everyday use, the layout would cover a coffee table, it had about 1200V HT and had to be used with very sensitive speakers but the sound was stunning.
Majority of other valve amps I've head didn't sound that great to my ears
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pagan
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Post by pagan on Mar 5, 2008 11:40:00 GMT
Totally missed this thread, I'm a numpty regarding vinyl so can't contribute bugger all towards it I'm afraid although I have heard a shite load of different vinyl based systems. About 70% of them didn't do anything for me although the other percentage ranged from very good to almost fantastic I'll set myself up with a TT sometime but I'm happy with my dacs so far. I can comment about the mod on the differential pair Alex mentioned earlier, this certainly did make an audible improvement, I even tried linking it out so to make comparing quicker but in all honesty the difference was enough to convince me I didn't need to compare backwards and forwards. It increased width and vocals sounded more clear with less crap on the edges Leo The mod to the LTP does works well, he's done the same thing to the preamp/headphone amp too. As for record pressing's, I think it's more relevent to the audio engineer's competency. and quality of pressings. But then the same thing should be said about CD recordings too. For most digital recordings are done 24/96. Dithered to 16/44k1, compressed, (so you don't have to adjust the volume). next step, the MP3 brigade. I suppose you could thow a valve in there to make it sound "musical".  now I should get flamed from both sides..  |
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XTRProf
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Post by XTRProf on Mar 5, 2008 11:56:23 GMT
Totally missed this thread, I'm a numpty regarding vinyl so can't contribute bugger all towards it I'm afraid although I have heard a shite load of different vinyl based systems. About 70% of them didn't do anything for me although the other percentage ranged from very good to almost fantastic I'll set myself up with a TT sometime but I'm happy with my dacs so far. I can comment about the mod on the differential pair Alex mentioned earlier, this certainly did make an audible improvement, I even tried linking it out so to make comparing quicker but in all honesty the difference was enough to convince me I didn't need to compare backwards and forwards. It increased width and vocals sounded more clear with less crap on the edges As for record pressing's, I think it's more relevent to the audio engineer's competency. and quality of pressings. But then the same thing should be said about CD recordings too. For most digital recordings are done 24/96. Dithered to 16/44k1, compressed, (so you don't have to adjust the volume). The vinyl and cd process must be done right to sound their best. For vinyl, considerations have to be taken into vinyl grade like virgin or super vinyl. Surprisingly not many knows pure vinyl is transparent in colour and those black vinyls are already "contaminated" to get the pleasing black colour and better strength. Also, half speed mastering is better than the normal. However, due to studio time is expensive for such a project recod companies do not do that to save. Another consideration is the stampers how many times are reused? That's why those test presings which usually are the first few from the stampers are terrific sounding. Yes, I'm not joking. Terrific sounding that cds will have trouble sounding. Of course, not on a dynamic range basis but overall. For cds, the same applies and we can have very good sounding ones coming from those audiophile ones that take proper care of the process. Good examples are those XRCD and the latest K2 HD cds which sound very very good compared to their vinyl counterparts, losing only on the 3rd dimension which hirez digital has in parts but not completely. In my area, I also like the Hugo LP45 audiophle cd which are basically a studio cdr burnt directly from the master tapes. As u can see, this process is minus the cd plant pressing process and u can imagine how good it will sound. U are basically having a master cdr or dat, during older times, in ur hand for quality that's supposed to be sent to the cd plant for cd pressing. As this cost a lot of expensive studio time, this process is not done at the normal cd processing level due to high cost. |
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Deleted
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Post by Deleted on Mar 5, 2008 12:00:29 GMT
MP3 ? Is that the slowly dying format that has been superseded by Apple "Lossless" ? I bet even the Singapore Stallion couldn't pour his "Zen" over that and make it sound even half decent ! |
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Deleted
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Post by Deleted on Mar 5, 2008 12:06:28 GMT
Oh dear, and I always thought that it had something to do with reducing stylus wear !  SandyK |
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XTRProf
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Post by XTRProf on Mar 5, 2008 12:35:43 GMT
MP3 ? Is that the slowly dying format that has been superseded by Apple "Lossless" ? I bet even the Singapore Stallion couldn't pour his "Zen" over that and make it sound even half decent ! Ha, ha, I hate MP3 except in a train or bus. |
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now I should get flamed from both sides.. 
