Direct drive vs belt vs rim vs idler arm

Hello Dover i just want to clarify that the turntable is not hunting correcting etc.. the reason you see the 33rpm marker moving is because i am putting lateral force(on the side of the platter) it is dead rock solid :)

Lawrence
Fidelity Forward

just to recap for people that did not see my vid on rauls thread.....on how a good turntable will handle pulses from my finger which would be a thousand times more then any groove modulation!the kab strobodisk will show off this

https://www.youtube.com/watch?v=PB2TaN2FPRU

if your interested contact me

Lawrence
Fidelity Forward

Dover,Ct0517 IMO the timeline is really only good for testing long term speed stability at least the old one was....the Kab strobodisk will and can tell you more on the short term this is what i used in the video...no other turntable that i have used or played with could correct so fast that our/my naked eye cannot see!

for all and anyone interested in what that tt was please contact me offline as i do not want to cause a rukus and or panic..

Lawrence
Fidelity Forward

Hello Dover no its a pioneer TT I really wish you would contact me offline about this ..but ok here goes... its a pioneer PL L1000A I have used this table with our own arm to great avail!!

speed drift something like .00008% @ 33 rpm!!

and possibly as or more important.... less then .00003%/per degree of temp change!!!

IMMHO there is nothing out there that can compete with this very advanced hung motor rotor motor and its electronics...

lots to the experimenter plinths or *nude* :)

more to come

Lawrence
Fidelity Forward

Hello Mr dovir I see you seem to not read my postings...again for the record that movement was because this particular TT has a hung suspension and when you put lateral side force thats what happens the platter moves...LOL

no other turntable has ever been able to accomplish this task..Does it really matter?! maybe ..maybe not..but it clearly shows that constant change of load(big load) does not affect its speed stability...IMO this is a big deal if you like to play lots of different music(frequency extremes) like including organ music etc...

Lawrence
Fidelity Forward

Dover... great writing and I can agree with most of what you wrote...

Robert fulton did do testing and experiments and of course most important listening ...his conclusions where that hi profile line contact elliptical ect etc... in a pivoted arm causes "lots" of distortion (audible)due to the fact of cantilever twisting...and in fact maybe do to hi freq phase anomalies because of the twisting

moreover you maybe right on why we hear differences in everything because of the servo/drive/electronics etc..

please carry on

Lawrence

Fidelity Forward

Peterayer...Yes i totally agree if it was not for a lot of people on these forums starting to demand better performance then no company would be willing to invest in our little hobbies!

Manufactures do read the forums!

Lawrence
Fidelity Forward

Dover I personally would like to know what your main system consists of?

There is a reason for this

Lawrence
Fidelity Forward

Quote:I believe a great direct drive is the most difficult to achieve because of audible artifacts introduced by most implementations

I would have to say this is the total opposite IMO Idler would be the most difficult because of all the mechanical things it possess..... motor. idler wheel..idlerwheel arm etc. etc...I personally played with a few Idler TT but mostly the lenco...problem is these tables will not play the bottom end like a good direct drive period! most people that use idler tables use horn systems with limited bandwidth so they do not understand what i mean...the idler (lenco) can give you a false impression of bottom end because its shelved up in response in the 40 cycle range but homogenizes the last octave....please do not kid yourself they are very nice sounding but not IMO in the same league that the upper best DD are

win we talked about this remember...I think you may have taken offense and if so I am sorry... I hear what i hear and i know what i know

Lawrence
Fidelity Forward

Not picking on you Dover but you talk about digitized sound from DD motors because of there electronics..but you dismiss the FACT that your Final vinyl TT uses some kind of sine wave generator so it does not rely on the line freq stability but hmmmm lets see what kinda electronics could or would they imply in practice?! Quartz oscillator? feed back?! etc. you get the point..lot more to understand before we/YOU can come to a "more better" conclusion

kind regards

Lawrence
Fidelity Forward