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I used this tool (link below) to simulate some results and need some help analyze them. What I wanted to do is to compare tracking errors and distortions among three different setups for one same tonearm, each time using the same Lofgren A IEC approach with the inner null point at 65.998 mm and the outer null at 120.981 mm.
Set up 1 is to mount this arm at 208 mm pivot to spindle distance. According to Lofgren A, the arm will have an effective length of 226.368 mm, overhang of 18.368 mm, and offset of 24.381 degree.
Set up 2 is to mount this arm at 211 mm P2S distance. According to Lofgren A, the arm will have an effective length of 229.128 mm, overhang of 18.128 mm, and offset of 24.068 degree.
Set up 3 is to mount this arm at 214 mm P2S distance. According to Lofgren A, the arm will have an effective length of 231.894 mm, overhang of 17.894 mm, and offset of 23.764 degree.
For now, let's assume the headshell mounting slot has enough space to allow cartridge to be aligned to any of these three setups. Let's also assume the cartridge may not be sitting squarely in the headshell, but for now let's just ignore that. Also, obviously we are ignoring the specifications/recommendations provided by the tonearm manufacturer - but that is done intentionally.
I used the spreadsheet tool mentioned (the second tab) to generate the tracking error and distortion statistics for each of the three setups:
Setup 1: 208 mm P2S distance -
Inner groove tracking error: -0.794
Outer groove tracking error: -1.931
Inner groove peak distortion: 0.658
Outer groove peak distortion: 0.661
Max between two null points tracking error: 1.115
Max between two null points peak distortion: 0.653
Setup 2: 211 mm P2S distance -
Inner groove tracking error: -0.782
Outer groove tracking error: -1.903
Inner groove peak distortion: 0.648
Outer groove peak distortion: 0.651
Max between two null points tracking error: 1.099
Max between two null points peak distortion: 0.644
Setup 3: 214 mm P2S distance -
Inner groove tracking error: -0.771
Outer groove tracking error: -1.875
Inner groove peak distortion: 0.639
Outer groove peak distortion: 0.642
Max between two null points tracking error: 1.084
Max between two null points peak distortion: 0.635
My questions are:
1. The results show that the setup with a longer P2S distance tends to have less tracking errors and peak distortions, correct? If so, among these three different setups, are the differences generally audible by human ears?
2. Let's say my current armboard will only allow me to mount at 208 mm P2S distance. Is it worth the trouble to make a new armboard with the 211 mm or 214 mm distance? Again, let's assume the headshell slot space is sufficient to allow mounting at either distance.
Thank you very much for reading and helping!
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Topic - Cartridge alignment - mounting distance questions, longish and technical - Da He Hua 09:28:03 02/14/17 (63)
- RE: Cartridge alignment - mounting distance questions, longish and technical - flood2 17:31:15 02/14/17 (0)
- RE: Cartridge alignment - mounting distance questions, longish and technical - jedrider 14:31:13 02/14/17 (0)
- RE: Cartridge alignment - mounting distance questions, longish and technical - Lew 13:25:37 02/14/17 (0)
- RE: are you designing your own tonearm? - user510 10:19:16 02/14/17 (59)
- RE: are you designing your own tonearm? - Da He Hua 11:56:34 02/14/17 (58)
- RE: are you designing your own tonearm? - PAR 14:40:15 02/14/17 (0)
- RE: It wants a Stevenson alignment - user510 14:32:45 02/14/17 (56)
- RE: It wants a Stevenson alignment - Da He Hua 14:52:35 02/14/17 (55)
- RE: It wants a Stevenson alignment - flood2 17:42:00 02/14/17 (53)
- RE: it is a Stevenson if... - user510 19:46:51 02/14/17 (52)
- RE: it is a Stevenson if... - flood2 23:09:57 02/14/17 (0)
- RE: it is a Stevenson if... - flood2 23:08:03 02/14/17 (49)
- RE: it is a Stevenson if... - John Elison 06:28:15 02/15/17 (44)
- RE: it is a Stevenson if... - flood2 14:45:49 02/15/17 (43)
- Technics SL-1200 Alignment - John Elison 07:08:38 02/16/17 (39)
- RE: Technics SL-1200 Alignment - flood2 01:41:07 02/17/17 (38)
- RE: Technics SL-1200 Alignment - John Elison 02:48:15 02/17/17 (37)
- RE: Technics SL-1200 Alignment - flood2 23:04:22 02/17/17 (36)
- RE: Technics SL-1200 Alignment - John Elison 11:37:56 02/19/17 (35)
- RE: Technics SL-1200 Alignment - flood2 15:05:36 02/19/17 (12)
- RE: Technics SL-1200 Alignment - John Elison 18:16:17 02/19/17 (11)
- SME3009 Xinner ~=70mm!? - flood2 19:46:32 02/20/17 (10)
- RE: SME3009 Xinner ~=70mm!? - John Elison 11:21:16 02/21/17 (9)
- RE: SME3009 Xinner ~=70mm!? - flood2 17:06:14 02/22/17 (4)
- RE: SME3009 Xinner ~=70mm!? - John Elison 08:10:01 02/23/17 (3)
- RE: SME3009 Xinner ~=70mm!? - flood2 16:55:39 02/23/17 (2)
- RE: SME3009 Xinner ~=70mm!? - John Elison 21:30:29 02/23/17 (1)
- RE: SME3009 Xinner ~=70mm!? - flood2 02:20:20 02/24/17 (0)
- RE: SME3009 Xinner ~=70mm!? - flood2 16:08:03 02/22/17 (3)
- RE: SME3009 Xinner ~=70mm!? - John Elison 12:45:00 02/23/17 (2)
- We are in complete agreement! :) - flood2 14:30:44 02/23/17 (1)
- RE: We are in complete agreement! :) - John Elison 21:10:19 02/23/17 (0)
- RE: Technics SL-1200 Alignment - frankwm 11:53:55 02/19/17 (21)
- RE: Technics SL-1200 Alignment - John Elison 22:20:40 02/19/17 (19)
- RE: Technics SL-1200 Alignment - frankwm 00:23:11 02/20/17 (18)
- RE: Technics SL-1200 Alignment - John Elison 05:28:47 02/20/17 (17)
- RE: Technics SL-1200 Alignment - frankwm 05:41:45 02/20/17 (16)
- RE: Technics SL-1200 Alignment - John Elison 12:38:08 02/20/17 (15)
- RE: Technics SL-1200 Alignment - flood2 20:01:27 02/21/17 (14)
- RE: Technics SL-1200 Alignment - John Elison 07:31:02 02/22/17 (10)
- Stevenson's Socket... - frankwm 09:16:34 02/22/17 (9)
- Your right! - John Elison 00:29:47 02/24/17 (8)
- RE: Your right! - frankwm 02:27:29 02/24/17 (1)
- RE: Your right! - John Elison 12:41:44 02/24/17 (0)
- RE: Your right! - flood2 02:11:14 02/24/17 (5)
- RE: Your right! - John Elison 05:12:00 02/24/17 (4)
- RE: Your right! - flood2 01:41:02 02/25/17 (3)
- RE: Your right! - John Elison 05:45:32 02/25/17 (2)
- RE: Your right! - flood2 23:43:20 02/26/17 (1)
- RE: Your right! - John Elison 03:30:25 02/27/17 (0)
- RE: Technics SL-1200 Alignment - John Elison 05:55:20 02/22/17 (2)
- RE: Technics SL-1200 Alignment - flood2 15:08:48 02/22/17 (1)
- RE: Technics SL-1200 Alignment - John Elison 23:29:50 02/22/17 (0)
- RE: Technics SL-1200 Alignment - flood2 13:59:41 02/19/17 (0)
- RE: it is a Stevenson if... - John Elison 16:11:46 02/15/17 (2)
- RE: it is a Stevenson if... - Garven 10:45:49 02/16/17 (1)
- RE: it is a Stevenson if... - John Elison 14:02:18 02/16/17 (0)
- RE: it is a Stevenson if... - user510 00:38:14 02/15/17 (3)
- RE: it is a Stevenson if... - John Elison 02:00:50 02/16/17 (0)
- RE: it is a Stevenson if... - flood2 01:44:48 02/15/17 (1)
- RE: it is a Stevenson if... - user510 08:44:27 02/15/17 (0)
- RE: it is a Stevenson if... - John Elison 19:55:27 02/14/17 (0)
- RE: It wants a Stevenson alignment - user510 14:59:01 02/14/17 (0)