Thanks - yes it seems quite an "issue"
FWIW I spent a few hours this evening experimenting with various null points - Stevenson, Baerwald, Lofgren B and I could not get any to line up at both inner and outer! However, the Jelco OEM null points of 59.063 & 112.507 do line up and what's more in this position the stylus tip is exactly aligned with the Jelco arm template position! I'm committed to a distance of 214 mm as that's where my (very expensive) armboard has put it. Looking at the distortion curves on vinylengine for all 4 settings the OEM ones look an OK compromise to me.
So it certainly looks like 214 mm is not the best mounting distance for this arm.
Regards
Steve
FWIW I spent a few hours this evening experimenting with various null points - Stevenson, Baerwald, Lofgren B and I could not get any to line up at both inner and outer! However, the Jelco OEM null points of 59.063 & 112.507 do line up and what's more in this position the stylus tip is exactly aligned with the Jelco arm template position! I'm committed to a distance of 214 mm as that's where my (very expensive) armboard has put it. Looking at the distortion curves on vinylengine for all 4 settings the OEM ones look an OK compromise to me.
So it certainly looks like 214 mm is not the best mounting distance for this arm.
Regards
Steve