fleib
Responses from fleib
| Vintage DD turntables. Are we living dangerously? Halcro,If the record/platter interface isn't yet understood or a matter of opinion, why defer to original options offered for your old table? The fact that there were options implies there is/was no one right solution. Perhaps not, but I think thi... | |
| Vintage DD turntables. Are we living dangerously? Halcro,No one has yet to provide a provable theory how or why a mat works?This stuff might seem like rocket science to you or I, but it's not. The record/platter interface is understood, but platters are made differently and people bring their pre... | |
| Vintage DD turntables. Are we living dangerously? ........or have their ear bitten off. Bon appetit. Sorry I chimed in.This has already been done by Pierre Lurne, only with a platter rather than a mat. I happen to have some sheet lead. Might see if it's doable. | |
| Vintage DD turntables. Are we living dangerously? Halcro,The purpose of a mat is to provide a stable surface with a similar impedance of the record, or so they say. Some think the best mats are forms of acrylic, methacrylate (Delrin), carbon, or vinyl. The trick is in preventing vibrations from r... | |
| Conical cartridge question Phasecorrect,AT has a new cart with a spherical tip. It's the 5V. The motor is similar to a 150MLX and it seems to be made for med mass arms. The stylus is interchangeable with modern 100 series (100E, 440ML, 150MLX, 7V) so it could possibly be us... | |
| Cartridge impedance loading question Atmasphere,*If the cable capacitance is low, the resonance will be in the MHz region, in which case if the preamp does not care about RFI you simply won't hear a difference unless you load the cartridge so low that its output drops.*If capacitance... | |
| Cartridge impedance loading question There should be no tonal change with different loads. If there is, it's either RFI or intermodulation from that high frequency oscillation. In such cases all you can do is load it down or try another cartridge or phono stage. | |
| Cartridge impedance loading question Griffithds,If the cart gets bright (change tonal qualities) with higher value load, it probably is as Atmasphere says. Not sure what good that knowledge will do. You'll load it down anyway.Lew,I take it that changing loads in the MP1 isn't that ea... | |
| Cartridge impedance loading question Lew,Congratulations on the new cart. You might find that dynamics and stage get larger with a higher value load, and focus more precise with a lower value.Sloppy bass would suggest a lower load. It might take some experimentation.Regards, | |
| Cartridge impedance loading question *The larger you make an air coil, the lower its inductance.*In this case larger means more turns - higher inductance.*The noise that a phono section has is usually not a function of loading. There are a lot of factors that have to do with noise- i... | |
| Cartridge impedance loading question Atmasphere,A coil with a magnetic core is more efficient so air core coils must be larger to get a usable output. The newer AT air core designs are the exception, probably using stronger magnets. Older designs like the DL-S1 have very low output a... | |
| Cartridge impedance loading question Atmasphere,I see you brought back up. The LOMC I was referring to are some of those coreless designs with very low output and high inductance/resistance relative to other MC. It was J Carr who told us about the HF oscillation/noise that could occu... | |
| Cartridge impedance loading question *The answer has to do with how the phono stage reacts to RFI as I have pointed out.*Loading encompasses more than RFI as I have pointed out.*Designers also have to be pragmatic about what sort of input impedance is needed to control noise! If it w... | |
| Cartridge impedance loading question * The correct loading for any cartridge will be such that it does not ring at audio frequencies- IOW if you run a squarewave through it, a squarewave will come out with no ringing.* Ringing at audio frequencies might be a your criteria for loading... | |
| Cartridge impedance loading question The correct loading for the cartridge is 47K ?There is no "correct" loading. Assuming you're going straight in, why don't you start at 100 ohms as suggested by Shelter and adjust it to taste? http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&10771... |