terry9
Responses from terry9
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback The DIY thread has a graph of US effectiveness on particle size vs frequency. IIRC, because particle size is limited by the size of record grooves, 40 KHz is a few percent better for the largest particles, but far worse for the smallest. The small... | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback Yeah Oilman, I feel your pain. I washed a few records in LA with tap water, and no matter what I did, they were a dead loss until I cleaned them with US in 2013. Now they are pristine, stone cold mint renditions of great performances! | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback Rushton, I am using a FisherBrand model 11203, which is a rebranded Elmasonic P60H. Even the color scheme and the manuals are identical. I have a sentimental attachment to Fisher Scientific, that's all. Also, as a scientific supply company, Fisher... | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback About warpage, I try to cool the record uniformly and quickly by rapid immersion in cool water. This may also play a part in my good (for the most part) fortune. | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback Hello Rushton. 50 C came from a challenge on the DIY forum, in which I posted that 37 KHz sometimes worked better than 80 KHz. The OP asked me if that was possibly an artifact of temperature. I tested, and it was.This led me to try higher temperat... | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback Hello DG. Glad the Elmasonic is working as well for you as it does for me.DG, if you are having warpage problems, I think it likely that there is some difference in our methods. By trial and error, and lots of luck, I have settled on- 80 KHz (chem... | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback Further to your concern BC, I sampled 6 records done at low temperature (<30C) and 6 at 50C. In three cases in each group, there was a small dishing effect, of about .01 to .02 inches. Since the two samples seemed similar, I find no evidence o... | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback re: 50 CYes, BC, it's a bit disconcerting to see two fine records warp by .25 inches, but it's temporary. After 15 minutes, the records come out nice and straight - at least that's been my usual experience. | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback In case anyone is wondering how much of an improvement to expect, well, at least as much as doubling the cost of a major component. In my case, about the same as upgrading a $10,000 TT to a DIY cost-no-object, aerospace technology, air bearing TT. | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback I should add that correct record spacing and adequate energy concentration are very important. I cleaned about 2000 records without regard to these factors, and removed a lot of grunge; but I removed as much grunge again by scrupulously attending ... | |
| Rushton's DIY approach to ultrasonic record cleaning published by Positive Feedback My experience with US, in order of importance:1. record spacing should exceed 1.5 wavelengths (one wavelength is 1.5 inches at 40 KHz, 1.0 inch at 60 KHz, 0.75 inches at 80 KHz);2. US energy should exceed 50 W per record, or more if the tank is fi... | |
| Why pay so much for super high end? Fun, because it's supposed to be fun. Ever tried to make your own electrostatic speakers? Get the membrane tension right, get the tension uniform, keep it that way. Lots of trial and error - too much for my taste. Then there's the electronics. Too... | |
| Downsizing from VPI HW-19 Sim, I just mean the thinnest which you play. I play all the way from about 80g up - some of those old editions are mighty flimsy. | |
| Downsizing from VPI HW-19 I sympathize, simao. You should not have to tweak and tweak and tweak. It should be at your convenience, not a TT dictat.Sounds like a tonearm problem to me. I don't like to set up every time, and yet I get near-optimal sound.If you position your ... | |
| power conditioner Well, I have done blind testing.Test conditions: wall (dedicated audio line with 12 AWG) with factory power cord, wall plus $2000 power cord, Plitron isolation transformer with factory cord, Plitron with $2000 cord.The last two conditions were cle... |