If the pictures aren't big enough, click on them for
larger images (so you can read better too!)
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The shorter end of the L-shaped 'way rod' fits
into the rear counterweight and is secured by a set-screw & metal plug
combo.
Plug seems to be made from a bronze-like material. |
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This closeup also shows the varying length of the
set-screws.
Thread pitch is the same (when I swapped screws but didn't measure pitch). Next to the bronze plug is a set-screw/nylon plug combo that secures the big counterweight to the counterweight rod The nylon contact probably minimize the possibility of scratching the chrome-plated rod. |
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This is a complete set of the weights section.
Top L>R: Counterweight, main VTF & additional VTF weight. Middle: L-shaped 'way rod' Bottom: 2 different set-screws &
a spring-plunger & nylon plug for the main VTF weight. |
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The main VTF (Vertical Tracking Force) weight slides
along the longer segment of the L-shaped 'way rod' and is held in position
by the spring-plunger/nylon combo.
It has a 'coupling extension' where an additional VTF weight can be friction-fitted over. |
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Used on it's own for light tracking force, it slides
at 0.25 gram increment on the scale.
The 4 slots serves as an 'expansion spring' of sorts and can secure the 2nd VTF weight very firmly. |
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The 2nd weight is used when heavier VTF is required
by the cartridge.
It is slightly bigger than the 1st VTF weight and when used together, the VTF scale is adjusted by 0.5 gram increment. |
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The 2nd VTF weight (at the bottom) slips into the
main VTF weight's 'coupling extension' ... (correct terminology??) |
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This is a one-piece integrated rear counterweight.
Other design of the counterweight I own, is a
two-piece-set,
that's divided at the 'line' The CW for the original 3012
series is a HUGE & HEAVY thing, same diameter but much
longer... usually match with a one-piece long VTF weight.
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Diameter reading being taken.
Top view of CW shows clearly the channel for the CW shaft (that connects to the armtube via a rubber bushing/coupler). There's also a pic of the 'closed end' CW here. |
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AntiSkating weight or Bias weight.... hung with
a fine nylon thread and often lost :o(
There seems to be a variation in the weight as well (not sure if that's due to different arm lengths... ie between 9 & 12 inch). |
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Nothing new here.... get these made...
... they're not cheap! A assembled armament of weights looks like the picture here. |
Disclaimer:
The measurements are taken to the best of my ability AND
from a SME 3012 Series 2 that I OWN.
I have reasons to believe that all the components measured
are original to that arm, and I'm not liable for any assumptions you make.
I would however, appreciate it very much, to be corrected by someone wiser than I.
Feel free to use the photos for your personal reference
and if you need them at your site,
please ask... just
don't claim them as your own.
Created 030509 Ronnie aka RonWill 2003
