john_gordon
Responses from john_gordon
| Do 45 RPM records need higher anti-skate setting? Atmasphere, Tonywinsc,I used to think, as a previous poster, Omsed, posted, that antiskate should be the same irrespective of speed because dynamic friction would apply.But over the years I have continued to be open to new information I previously... | |
| Do 45 RPM records need higher anti-skate setting? Timeltel,As Omsed saidSkating force remains the same since it is based solely on the magnitude of friction and the offset angle of the tonearm. Same tonearm, same friction, same skating force, so anti-skate should remain the same.However, if the f... | |
| Do 45 RPM records need higher anti-skate setting? Omsed,No one is talking about spinning a complete turntable, or that there is a centripetal force involved in the skating issue, or that the cartridge is spinning with the record. If you read all the posts here and elsewhere I think that is clear.... | |
| Do 45 RPM records need higher anti-skate setting? Timeltelyou said: A pivoted arm with overhang will seek the center of a blank (ungroved) LP. Would it not move towards the spindle more rapidly if the disc were spun at 78 or 45 rpm than at 33.3?That depends on the friction generated. All things e... | |
| Do 45 RPM records need higher anti-skate setting? Mmakshak,There is actually a logical default position: namely, that given there is a skating force (which is old, proven, science, well documented, though commonly misunderstood) and which leads to VTF being different on each channel, it should be... | |
| Do 45 RPM records need higher anti-skate setting? Lewm,If there was no groove, the arm would skate and rotate until there were no forces acting to make it do so, so there would be, for a short while, a "conventional" centripetal force acting on the stylus and arm along the stylus to pivot axis ca... | |
| Do 45 RPM records need higher anti-skate setting? Omsed,You need to read and assimilate before spouting. Otherwise you may be considered a wanker.[quote] This greater acceleration does not exist. And more energy is NOT being put into the system or the volume would be louder on a 45![/quote] So wo... | |
| Do 45 RPM records need higher anti-skate setting? Zavato,Just noticed this.Your mistracking is most likely caused by the 45 presenting the cartridge with the problem of tracking a groove which makes the stylus accelerate at a greater rate. This puts it at the edge of its tracking envelope, theref... | |
| String and weight anti-skate geometry? The arrangement that is mentioned on the SME instructions means that the anti-skate reduces by around 20% at the inner groove. If you alter the position of the pulley, you can make it increase rather than reduce, which is what most arms do, by hav... | |
| Zero Antiskate vs Stylus Wear Nick and Lewm,I should have checked my post, as I meant to say that the arm in Nick's straight arm example "has zero skating forces at one point, which coincides with it being a null..." (not overhang)The arm has underhang as measured from the tur... | |
| Zero Antiskate vs Stylus Wear Nick,The forces you mention will be just the same in any arm, whether with straight or offset cartridge, as long as it has an overhang. And similar overhang or underhang will produce similar skating forces, everything else being equal.In your exam... | |
| Setting tonearm angle? Actureus"Why would the azimuth change when you adjust the VTA? The two are set in two different planes. The SRA and overhang, sure, but not the azimuth. "It depends on the arm design. If the bearings are at right angles to the arm tube then the ca... | |
| Who needs a MM cartridge type when we have MC? Hello, Lharasim,Sorry to be a little late. I was interested to see your arm, but am confused by you saying: We(Musical Arts) have a non damped armDo you mean you prefer a resonant arm tube?Also, I don't see from your picture how your arm has100 ti... | |
| What causes microphonics in a tonearm? Listen to your arm with no sound from the speakers. Almost all arms will have a measure of sound coming from the arm itself, ie acoustic noise generated from the cartridge which is transmitted to the arm tube and then to the air. Sometimes this is... | |
| George-Warren Turntable Hevac1Here's a link to help with geometry issues for 7 inch singles.7 inch geometryJohn. |