tonywinsc
Responses from tonywinsc
| Direct drive vs belt vs rim vs idler arm I used to think I was normal until I heard a difference in power cords. Why oh why did that have to happen to me. | |
| Direct drive vs belt vs rim vs idler arm Hi Ketchup,The fewer data points that you have, then the higher the standard deviation which let's say is increased uncertainty. Just the fact that you are going to make two 0.100" pencil marks 0.02" apart is going to add to the measurement error.... | |
| Direct drive vs belt vs rim vs idler arm I know what you are saying. Our simple measuring equipment has limitations. If you stare at this data too long and try to interpret something that is just not there, then you will start to see fairies dancing on the screen. I think the app is perf... | |
| Direct drive vs belt vs rim vs idler arm Also, it looks like to me that the app is reporting peak values, it is not averaging. I noticed that while looking at the handheld CD test results vs. resting the phone on a table. So like I was saying, one blip on the test record, like a high spo... | |
| Direct drive vs belt vs rim vs idler arm All measurement equipment has an accuracy and a repeatability factor. As engineers we have to measure our measurement equipment and it can get frustrating and confusing at times. Like the old saying: "A man with two watches is never sure what time... | |
| Direct drive vs belt vs rim vs idler arm Hi Lespier,Very impressive results. Congratulations on your tt design. I am also amazed at the unfiltered results. Your test record is centered nearly perfect based on the extremely low Wow&Flutter results. Did you do anything special to your ... | |
| Direct drive vs belt vs rim vs idler arm Hi Halcro, the DD table seems to like a little more load perhaps. Notice that the filtered sine wave has a period of 1.8 seconds or one complete rotation of the platter. That could be the runout of the platter, the motor controller oscillating gen... | |
| Direct drive vs belt vs rim vs idler arm Dear Halcro, what an excellent job you did testing your turntables. Your dedication to the hobby is impressive. It looks like the DD table actually increased speed just a bit with the 2nd tonearm while the belt drive dropped by about the same amou... | |
| Direct drive vs belt vs rim vs idler arm I see variation about the setpoint which is normal. That is the speed control system working. The DD table has a funny pattern to it. Notice the two bumps and then a flat line in the speed plot? The DD table speed control seems to do a correction ... | |
| Direct drive vs belt vs rim vs idler arm Hi Halcro,Thanks for uploading those pictures. It is exciting to see how different tables perform. First, note that the Raw Frequency plots are nearly the same on both tables as it should be. That is due to the eccentricty of the grooves to the ce... | |
| Direct drive vs belt vs rim vs idler arm Another observation that I should note: The record has a much bigger, broader soundstage so the drums sound further away. The CD soundstage being smaller makes the drums sound closer more immediate. I know it is not the case, but it is like the ba... | |
| Direct drive vs belt vs rim vs idler arm I just did an experiment using the first track on Fresh Aire III. Some great drums and synthesizer on that track. I have both the CD and the record so I listened to the first track back to back. I focused on the bass. I found that the bass on the ... | |
| Direct drive vs belt vs rim vs idler arm Works for me too. I invite anyone to come listen to the Appassionata on my tt and tell me what's wrong with it. I don't mind constructive criticism- except that it ends up costing big $$$ in upgrades. :) | |
| Direct drive vs belt vs rim vs idler arm Actually, high precision bearings are not that expensive. Balls with sub micron tolerances can be purchased for pennies- even in ceramic and ruby. Shafts can be had very cheaply that are ground to high precision tolerances. That is the product of ... | |
| Direct drive vs belt vs rim vs idler arm Here is another thought to feed on our neurosis. (I hate to suffer alone :) Like I have said before, the tolerance on the center hole of records is such that the record Wow&Flutter is going to be around 0.5%. My favorite iPhone app will show y... |