|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
76.26.94.68
When it comes to measuring the weight of the cartridge, does it matter whether you measure it at record height or a good bit below? Isn't weight weight regardless? I would explain why I am asking but it is probably more than you want to read.Now if I could only get my Shure stylus weight gauge to agree with my electronic one. Ugh.
Edits: 08/31/14 08/31/14Follow Ups:
It is particularly important if your arm uses a spring based VTF and how it is configured.
If it is a torsion spring then if your reference height for the arm is too high with respect to the record, then you will have a slightly lower effective force at the record surface. The converse is true if the arm is too low.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
Four a Souther linear tracker, I don't think there is a spring involved anywhere.
The idea is that you want the arm to be at the level you would for playback; measure the downforce with the arm higher or lower than at the record height and the measurement will be either higher (stylus below record height) or lighter (arm measured above the record's height).
Think of the arm as a balanced lever- if it leans either way from level (meaning exactly where you want the stylus to sit, which would be record height) at its fulcrum's point of balance, it will exert more force in that direction. Hence you need to take your measurement at the record height.
Hope I used the right terminology there!
Dman
Analog Junkie
All right, asked and answered. Thanks!
You're right but only because most arms are slightly underslung.
If the centres of mass of the arm components were all in the plane of the fulcrum the VTF would reduce very slightly if the headshell was above or below the fulcrum.
Mark Kelly
If you are concerned about the stylus force on the record groove, you need to measure it at exactly the same level as the record groove. Here's how I do it.
Otherwise how can you get the VTF that is recommended?
Have you tried measuring at the exact center of your scale without that extension (same height of course) and compare that to what you get as shown in the photo? When you are only measuring to a tenth of a gram not being in the center of the scale could make a difference depending on how the scale operates.
Well, I can't place a moving coil cartridge directly onto the center of the scale platform because the strong magnet within the cartridge body affects measurement accuracy. However, I have a 5-gram calibration weight and it weighs exactly the same when placed on top of the quarter or when placed on the plastic side platform. I have also constructed paper weights of 1.5-grams and 2.0-grams, which weight exactly the same regardless of whether they are placed on the scale or the side platform.
Thanks John. I will jerry rig my gauge and get a proper measurement,
- you could always try Jimmy-rigging. (smiley face)
Edits: 09/02/14
Heh, I would but I don't know Jimmy.
It did work though. Took a piece of gutter directional material, basically aluminum. Cut off a strip and formed it up like John's. I had the cartridge set well over 2g when 1.4 is optimal. It sounds a lot better now.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: