richardkrebs
Responses from richardkrebs
| Direct Drive I just knew I should not have hit that bee hive with a stickš Correct, it is not cogging, as Lew and I have already explained. ā the problem is pulsingā Ā letās get this out of the way..,, An 8 pole motor would be 2 phase. This is not a linear tor... | |
| Direct Drive @clearthinkerĀ I think that we need to step back and look at drive alternatives a little more accurately. A well tuned PID controller will not constantly speed up and slow down, provided the motor controller architectureĀ is well designed.. The ph... | |
| 2020 update : JC Verdier La Platine Ledoux Good Ā luck with your project. Keep us updated on how it goes cheersĀ | |
| 2020 update : JC Verdier La Platine ledoux. The motor I described is what I used in my design of the OMA K3 turntable. I found the constituent parts online after a 6 month search. I had to make the motor from these parts.Ā Being direct drive, I have optimised the motor for low spee... | |
| 2020 update : JC Verdier La Platine AC vs DC.Ā While I fundamentally agree with Dover, a few points he raises need expansion. Not all AC motors lock on to the field frequency. What we should be talking about is synchronous motors.Ā In this design the rotor follows the rotating field... | |
| If I could afford, Iād purchase 100% Oswald Mills Audio gear @chaksterĀ A friend pointed me to this thread. I donāt know how I missed itre your comment about me posting details on K3ās design and development hereā¦ I donāt think that it would be appropriate, as it would effectively be a marketing exercise. No... | |
| 3 New UBER Decks - Is this Turntable's SwanSong? š¦¢ Raul.Thanks for your comment. Yes the test record is what most of us use if we are to look at W&F, and as I have said earlier, it is useful to broadly differentiate between TTs. This despite the many variables in play.Ā I also pointed out that ... | |
| 3 New UBER Decks - Is this Turntable's SwanSong? š¦¢ Yeah, one day I will see the light and buy a CD player! | |
| 3 New UBER Decks - Is this Turntable's SwanSong? š¦¢ Halcro.Ā I echo Raul in that I'm happy that you are enjoying your TT's. After all, this is what this hobby is all about.Ā Dover.Thank you for your sage input. Yes the arm/cartridge are part of the loop so they do impact the figures, Halcro has just ... | |
| 3 New UBER Decks - Is this Turntable's SwanSong? š¦¢ Halcro. I think that the numbers and green graph are useful provided their limitations are taken into account. Mean frequency....This is a good number to have. We are looking for 3150Hz, so nice and close to this is desirable. Raw frequencyā¦... | |
| 3 New UBER Decks - Is this Turntable's SwanSong? š¦¢ Yes.;The Yellow trace is a a long way away from the ideal sine wave, its pretty messy. This TT is not micro speed stable.Ā As I implied before, on average it takes 1.8 seconds to complete a single revolution ( 33.333 rpm) so the filtered Green trac... | |
| 3 New UBER Decks - Is this Turntable's SwanSong? š¦¢ Re speed stability. As has been noted, the numbers produced by the platter speed app vary from test to test. This depends upon how the tester placed the record on the spindle, there is a small amount of clearance, so the record can appear to have ... | |
| Who needs a Diamond Cantilever...? š If I may, a question for Jonathan.Some cartridge designers use super short cantilevers. As the stylus tracks the groove it moves in an arc. With a short cantilever this arc has a very small radius. Would this cause an inter channelĀ phase shift as... | |
| Technics SL1000 MK3 (SP10 MK3) performance/value VS modern turntables? @au_laitGood idea, I wish I had thought of pre and post recording. Unfortunately this hasn't been done.Ā cheers.Ā | |
| Technics SL1000 MK3 (SP10 MK3) performance/value VS modern turntables? rich121.Thankyou for clarifying things, appreciated.Ā And yes, our hobby should be the total opposite of stressful.Cheers.Ā Ā |