john_gordon
Responses from john_gordon
| VPI 3D tonearm Much depends on the nature of the joint. An abrupt change in section will have acoustic consequences, either good or bad, whatever the method - 3D printing, welding, gluing or otherwise. In the case of some 3D printing, lasers are used to fuse the... | |
| Polishing your TT bearing And make sure you thoroughly clean out the bearing housing and clean the spindle leaving no polishing compound, other wise it will continue to polish and accelerate wear.Same applies when polishing turntable platters, sub platters, motor pulleys e... | |
| VPI 3D tonearm Manitunc That production point depends on the cost of the tooling or molds required for other processes. However, that tooling or mold is required whether you build 10 or 10 thousand and can be prohibatively expensive to prototype, which is really... | |
| VPI 3D tonearm What I find interesting is that it looks more or less the same as the existing arms rather than anything different that might imply a fresh look at the design in the light of a new manufacturing method.John. | |
| Question on FR 66s Chris,Your new P2S would be fine. To get the new effective length it is more useful to also take 307 * sine 16.8, as this gives the linear offset, which is a constant for any particular alignment, and doesn't change when using integrated headshell... | |
| Question on FR 66s Halcro,As an aside, if Dertonarm's recommending setting the P2S at 231.5mm for the FR64 with FR7, that presumably means that when using the FR7 pickup, the effective length is changed as is the cartridge offset, and he reckons that is the best way... | |
| Question on FR 66s Hi LewmThe Dennesen principle allows any arm to align to LofgrenA/Baerwald. If the arm is designed to that alignment to begin with and is mounted at the correct P2S the cartridge will align with the grid when square in the headshell. If the arm is... | |
| Question on FR 66s Halcro,Yes you are correct: the only way to adjust cartridges like the SPU on arms like the FR64 and 66 is at the base, as the headshell offset is fixed. Which is why on a specific arm you have to use the existing specific arm alignment which uses... | |
| Question on FR 66s Bill,With the UNI-Pro, if I set the tonearm to SME's prescribed P2S and check alignment with the Baerwald template, which Daniel says is the one to use with the SME, it's way off, as one might expect. So, I can slide the SME along its base, changi... | |
| Question on FR 66s Chris,If you change the mounting distance to 297mm it will be fine if this gives a 12mm overhang. If you are using an SPU the headshell offset is fixed, so the only variable is P2S.If the arm was designed for a 50mm as opposed to 52mm pickup, then... | |
| Question on FR 66s Wrm57If you use an integrated headshell cartridge like the SPU then you can't adjust the offset angle.The SME arm you have is designed for LofgrenA (Baerwald). It is also designed such that that alignment can be set by adjusting the base for whate... | |
| Please Help Ambient Bass Resonance Hi Bifwynne,I checked the hum situation without the peripheral ring. Still have bass ringing feedback, but I had to turn the gain up even higher for it to kick in. Have you tried it without the clamp?John | |
| Graham Phantom mk II & JA Michelle ORBE se help The SME V has the base facing slightly towards the turntable spindle. The older traditional SME arms had the base facing more directly at the spindle. Some arms with SME bases can accommodate being mounted with the base facing the front of the dec... | |
| Do 45 RPM records need higher anti-skate setting? Atmasphere,It would seem so.Lewm,I think your take on it is right. All I would say is that rather than "headshell" offset angle, it is perhaps better to think of it as "groove" offset angle (which is what gives rise to the tracking angle error, as... | |
| Do 45 RPM records need higher anti-skate setting? Lewm,Check out the link to Alexandrovitch and other papers via this link.He found that with an unmodulated groove, there was no change in friction with radius ie groove speed. With a modulated groove there was an increase in friction, and this inc... |