Click title to read one, or click date to read all below it.
11-23-11
Dear raul: if one has built a turntable than which none grea ... Banquo363
11-23-11
Funny thing that as soon as a new component - which none her ... Dertonarm
11-23-11
Dear dertonarm/syntax: +++++ " however imho speed accu ... Rauliruegas
11-23-11
I am not assuming that the main requests are all there, - in ... Dertonarm
11-23-11
Speed accuracy has inspired two more companies bringing out ... Thuchan
11-23-11
Dear thuchan, the speednic by allnic looks neat. especially ... Dertonarm
11-24-11
From what i can see and read about the speednic......it seem ... Halcro
11-24-11: Tonywinsc
I downloaded the iPhone app and did some testing. The same test record that I used before also has a track with 3150Hz. As I mentioned before, I measured considerable runout in my test record which by itself causes some audible Wow when playing constant frequency test tones. The center hole of this test record has a slight amount of play on my tt spindle. After much patient work to minimize the record runout I got the following measurements: Mean Freq: 3151.3, Raw Frequency: -0.22%/+0.24% relative, -7.0Hz/+7.4Hz absolute. Lowpass Filtered Frequency: -0.02%/+0.01% relative, -0.5Hz/+0.5Hz absolute. I'm guessing that the filtered values subtract out the record runout. The reason I conclude that is as I meticulously adjusted the record on the platter to minimize runout, I had raw numbers as high as -9.8/+10.7Hz while the filtered values never exceeded 0.03%.
Another observation: The original Mean Freq was 3155.6Hz based on my setting using the strobe disc. I adjusted speed down and can certainly work some more to dial it in at precisely 3150Hz. The other observation is that holding the iPhone while taking the measurement adds more error. It is sensitive enough to pick up hand movements. I set the phone on a table about 1 meter away from the front of one speaker.
So how does my humble BD table compare to some others?
btw- I have a record clamp. So I adjusted the record relative to the spindle and then clamped the record down.
Tonywinsc (System | Threads | Answers | This Thread)
11-24-11
It seems like none of us read each other's posts, except rau ... Lewm
11-24-11
Dear lewm, disagree. i think they read the posts but they un ... Thuchan
11-24-11
I found the owners manual online for adjust+ and some review ... Tonywinsc
11-24-11
Bearing lube for dd turntables is yet another controversial ... Lewm
11-25-11
When it comes to bearings/ motors and platters i see a diffe ... Thuchan
11-25-11
Very interesting thread! obviously the question how importa ... Decibell
11-25-11
Tonywinsc, for records with holes out of centre my engineer ... Dover
11-25-11
Dover, good suggestion. i have a small, round bastard that ... Tonywinsc
11-26-11
The allnic speednic works pretty well. i have put two images ... Thuchan
11-26-11
My kab strobe works pretty well also. with it....the raven k ... Halcro
11-26-11
Halcro put it in the most precisely manner. the timeline may ... Dertonarm
11-26-11
I filed the hole in my stereo test record. i improved the r ... Tonywinsc
11-26-11
Dear halcro, you´re right the timeline is perfect. the allin ... Thuchan
11-26-11
Dear thuchan, i don't use the timeline as a record weight as ... Halcro
11-27-11
Purchased a timeline last year after my clearaudio strobe st ... Rugyboogie
11-27-11
Accuracy or sensitivity of speed monitor device should be pr ... Lewm
11-27-11
Tonywinsc, you have used the term "runout" several ... Pryso
11-27-11
Dear lewm, the allnic speednic is battery powered and not so ... Thuchan
11-27-11
Rugyboogie, i meant with one belt drive tt, sorry! best @ f ... Thuchan
11-27-11
Runout is the measurement of the eccentric motion in a rotat ... Tonywinsc
11-27-11
My mistake, thuchan. so therefore the allnic and the timekee ... Lewm
11-27-11
Thanks rugyboogie, the video was very amateurish but i think ... Halcro
11-28-11
Dear halcro, 'but the way many are discussing ...strobes (ve ... Nandric
11-28-11
Halcro, i think you're on the wrong track ... simple physics ... Decibell
11-28-11
You're right of course decibell. the 'correction' to any sty ... Halcro
11-28-11
Your timeline device is averaging speed. it is not giving y ... Tonywinsc
11-28-11
If you take a look at one of the old brochures for the denon ... Lewm
11-29-11
Dear lewm: yes, they did indeed. these are exerpts from a so ... Rauliruegas
11-29-11
Dear rauliruegas, this is very interesting! does this docume ... Decibell
11-29-11
My friend raul. thanks, got it! or as was once suggested, ... Pryso
11-29-11
Dear decibell: please email me. regards and enjoy the music ... Rauliruegas
11-30-11
Dear pryso, *now wasn't that non-engineer harry belafonte st ... Dertonarm
12-01-11
Dear peterayer, do understand. sometimes threads are dissape ... Thuchan
12-18-11
Hi there-------------------------------testing only. Rauliruegas
12-19-11
Raul try testing the timeline it goes like this - ... Dover
01-11-12
dover, that was funny. :-d the thread " ttweights ... Hiho
01-12-12
I have just fitted a thread drive to replace the rubber belt ... Halcro
01-12-12
I'm sure because ttweights places many ads here on agon they ... Sksos1
01-13-12
I have just replaced the rubber belt on my raven ac-2 with t ... Halcro
01-14-12
Halcro, interesting and thanks for sharing. what's very inte ... Dev
01-14-12
Dear henry, what about listening? when you set the table up ... Lewm
01-14-12
Dear halcro, your new experience with a thread driven raven ... Solong
|
|
