Skeletal vs Plinth style turntables
02-10-15: Timeltel Hi Timeltel (professor) - I am a music lover / part time audiophile. If I have a question regarding cartridges, your posted opinions are the ones I look for. You are a cartridge expert in my view. Please excuse my grammar in this morning's post :^( |
Hi CT I just love Parrots and Bees - nothing too sophisticated about that. When I use my real name I have always had some bizarre report from Hong Kong telling me about starving children needing $1000 usd in 24 hours to a foreign bank account. Sorry for taking offence in the earlier post. I am also fiddling around with some cheaper DD's so I may experiment with other plinth materials - who knows - I only have so much time on my hands to potter around like a maniac |
Cool - I like parrots, and try to avoid bees, but understand their importance on earth. I remember going at it pretty good with Dertonarm on that Copernican thread. He made no sense to me at all. No sense of humor at all, and he was always arguing against armpods. Then I discovered his own Apolyt table used armpods. Henry, I'd insert some emoticons here showing utter amazement, but alas my Lenovo Windows 7 laptop is incapable of doing this. :^( |
Then I discovered his own Apolyt table used armpods.LOL Chris...😃 Audiophiles are just funny (strange) people..... Even rational university-educated audiophiles can make claims and statements without submitting one shred of corroborative evidence..... And the sad thing is....these statements (or really beliefs)...are often accepted by the masses and treated with the same gravity as solid evidence-based science...😥 Take for instance Richardkrebs who the Professor (Timeltel) humourously taunts... Now I like reading Richard's contributions here and he has undeniably made contributions to the turntable playback system (particularly in regards to Technics SP10 DD decks)....but 1) Perfect DYNAMIC speed stability. No drive system meets this and passing the (in)famous timeline test is zero guarantee of dynamic speed accuracy, only average speed accuracy.here we have an educated, trained professional stating that a repeatable and accurate scientific test should be ignored because it does not tell us what occurs BETWEEN every record revolution.... All manner of inexplicable and unimaginable oscillations could be occurring BEFORE the laser flash of the Timeline hits the exact same mark EVERY revolution...👿 But Richard need not provide any evidence himself of such malicious oscillations.... The fact that he can IMAGINE them is good enough to spread doubt and discredit the only scientific device which was able to prove conclusively that Stylus Drag was a fact...in fact..👀 Emboldened by the audiophile armour of theoretical hypothesising.... If this heavily modulated force is sufficient to slow a weighty platter of considerable inertia, would it not also be able to "tilt" a free standing pod even, if it is substantial?He forgets that the very device which he disparages (yet which proves the existence of Stylus Drag)...is also the device which answers conclusively his unsupported questioning of the free-standing pod....for if there were any movement in the pod itself or the tonearm (as the Professor rightly reminds us)....the Timeline laser would unmask it mercilessly...😜 And so for once...justice is done...👍 |
Halcro. Ok to answer your criticism's of my posts Most DD TTs use a synchronous motor with some type of feedback or a non synchronous motor also with feedback. In each case, if all is properly functioning the motor is COMPELLED to rotate at the correct AVERAGE speed. It depends upon the drive design how it reacts at smaller time increments. I have witnessed this incremental speed change by proxy on a Goldmnud studio by scoping its power supply. There plain as day was a distorted view of the music that was currently being played. Clearly the PS was not stiff enough but that is not the main point here. There can be only one cause of this modulation of the power supply. The platter is momentarily slowing in sync with the music and the motor/ controller assembly is reacting to this by drawing more current to correct the speed drop. The timeline test is showing that your TT is working correctly but do you honestly believe that its servo has some sort of preview of the upcoming modulation and reacts predictively? Of course not, it REACTS to a slow down and corrects. These errors are happening in real time, but it's average speed is correct. The platters inertia alone is insufficient. I did these tests 20 years ago and they proved to me, back then, that stylus drag exists. Then their is the subjective test. A frequent comment from my customers who have had MK3's upgraded is that the speed stability is improved yet the MK3 passes the time line test. I do a lot of work on the speed sensing mechanism in the upgrade so this observation does not surprise me. We should not need remanding that our hobby is subjective by nature. I do not understand how the time line test proves that the pod is not moving? All it is measuring is the platter's speed. |
