Hi Dougdeacon,
great insight on (inner / outer) groove distortion in my opinion.
I have these issues with an SME V arm with currently Ortofon Windfeld.
VTA and VTF as well as Azimuth seems of rather small influence since it is VERY little variable with this set-up.
Windfeld is VERY low riding => resulting very small VTA change range (else rear of cart touching record), arm has dynamic VTF adjustment => balance stylus just over 180 gramm record, add Ortofon Windfeld spec 2.6g, according to SME scale (pretty correct I should think).
Azimuth also very little adjustment possible, since only via 3 point Windfeld mounting support +/- 1-2 deg.
All been checked over and over to be found REALLY fine.
My question:
What is your best take on source of distortion when this ONLY happens during "high energy" treble in the last halve of the band?
Example DECCA SXL 2248, La Boheme, Tebaldi/Berganzi Highlights. When Tebaldi 'blasts' at the end of side one, I had no pick-up as yet to really handle it too well. Carts I had this far: Ortofon Jubilee, Windfeld (current), Lyra Dorian, and DV 20X-L all known to be good trackers to my knowledge.
Phono-pre's:
PS Audio GCPH, and currently Levinson ML326S phono-boards (both differential designs). Currently using Fidelity Research XF-1 type M, (1:31.6 = 30dB) with 13 ohm PRIMARY! to fully impedance match loading >=10ohm cart - 10.18 ohm at SUT primary. This sounding better than straight into phono-boards, which then had needed loading between 500 - 47k ohm (mostly sounding the same! with Windfeld)
great insight on (inner / outer) groove distortion in my opinion.
I have these issues with an SME V arm with currently Ortofon Windfeld.
VTA and VTF as well as Azimuth seems of rather small influence since it is VERY little variable with this set-up.
Windfeld is VERY low riding => resulting very small VTA change range (else rear of cart touching record), arm has dynamic VTF adjustment => balance stylus just over 180 gramm record, add Ortofon Windfeld spec 2.6g, according to SME scale (pretty correct I should think).
Azimuth also very little adjustment possible, since only via 3 point Windfeld mounting support +/- 1-2 deg.
All been checked over and over to be found REALLY fine.
My question:
What is your best take on source of distortion when this ONLY happens during "high energy" treble in the last halve of the band?
Example DECCA SXL 2248, La Boheme, Tebaldi/Berganzi Highlights. When Tebaldi 'blasts' at the end of side one, I had no pick-up as yet to really handle it too well. Carts I had this far: Ortofon Jubilee, Windfeld (current), Lyra Dorian, and DV 20X-L all known to be good trackers to my knowledge.
Phono-pre's:
PS Audio GCPH, and currently Levinson ML326S phono-boards (both differential designs). Currently using Fidelity Research XF-1 type M, (1:31.6 = 30dB) with 13 ohm PRIMARY! to fully impedance match loading >=10ohm cart - 10.18 ohm at SUT primary. This sounding better than straight into phono-boards, which then had needed loading between 500 - 47k ohm (mostly sounding the same! with Windfeld)