Sorane SA-1.2BCS Manuel utilisateur

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ＳA-1.2BCS

Instructions & Manual

Specifications

Total Length 310mm

Effective Length (Tonearm pivot to cartridge stylus) 239mm

Practical Length (Tonearm pivot to spindle) 223mm

Overhang 16mm

Offset angle 22.25°

Horizontal moving sensitivity 30mg

Vertical moving sensitivity 20mg

Vertical Tracking Force (VTF) range 0-4.5g (3+1.5g)

Cartridge plus Headshell weight range 15-45g

Antiskating Adjustment 0-3g (Equivalent to Stylus VTF)

Vertical Bearing Miniature Radial Bearing

Horizontal Bearing Miniature Radial Bearing

Height Adjustment (Plinth to arm-wand centerline) 15-55mm

Output plug RCA (XLR as an Option)

Output cable Single core shielded copper

Tonearm Audio Lead wire High Purity Silver (Internal Wiring)

Headshell lead wire Silver with gold plated terminal

Headshell Machine tooled Aluminum

Tonearm Net Weight 755g

Attached standard Headshell Net Weight 17g

Included Accessories

Headshell

Auxiliary counterweight stem

Detachable phono cable

Screws, Washers and Wrenches

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Template

Marking pin and plastic centering bushing

1) Mounting the tonearm base to turntable plinth

a) Determine where the arm base should be mounted by using the supplied arm mounting template.

b) Put thelarger hole of the template ontothe center spindle. Take the attached marking pin supplied (as

illustrated below) and push it through the small hole at the opposite end of the tonearm template (the

hole opposite the spindle hole). Keep the needle perpendicular to thetemplate. You may now mark

the center point of the tonearm base. The center point of the tonearm base is also the pivot point.

c) At the same time, mark the 3 holes for the screws that mount the arm base to the armboard.

d) Do not drill holes yet !

e) Having marked the center, check to see if there is sufficient clearance for the tonearm and the dust

cover (if you have a dust cover). Pay particular attention to the counterweight shaft.

f) After you have verified the dust cover willwork with thechosen arm base location, drill one 22mm hole

(this is the center, which allows access to the tonearm stem and cable) and three 3.5mm holes (for the

screws that mount the arm base).

22mm diameter hole: For tonearm shaft!

3 x 3.5mm diameter holes: For tonearm base fixing screws!

2) Attach the cartridge to headshell

Connect the wire leads to the cartridge pins, and attach the cartridge to the headshell with screws. (See

the figure below) Screws are not included in this tonearm kit. They are usually included with the

cartridge, from the cartridge manufacturer.

3) Mount SA-1 shaft through the base hole

a) Carefully push the tonearm shaft through the hole in the arm base and then fasten the set-screw with

the hex key supplied with the tonearm. Be careful not to over tighten!

b) Adjust the tonearm height to make the tonearm parallel with the surface of the record when the stylus

is touching the record. This is the starting point, and furtherfine tuning may be necessary depending

on the geometry and the stylus type of the cartridge. Consult the cartridge manufacturer for correct

VTA and VTF!

Template

Arm base

Turntable Plinth

Template

Arm base

φ22mm

Marking pin

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c) The cueing platform has already been set at the correct height but can be adjusted by using the

supplied hex key.

4) Cartridge tracking force adjustment

a) Verify that the anti-skating knob (number 3 below) is set at 0 grams.

b) Ensure that the sliding tracking force adjustment knob (number 4 below) is set to zero (the point

furthest to the back of the tonearm and closest to the pivot point).

c) After the cartridge is correctly adjusted for overhang, adjust the counterweight (number 1 below) so

that the arm is floating with the stylus approximately 3-5mm clear of the vinyl record. Once this

adjustment is made, the counterweight should be fixed by the set-screw located on the side of the

counterweight (number 2 below), using the supplied hex key.

d) Add tracking force by using the sliding counterweight located in the middle of tone arm (number 4

below). As the middle counterweight slidesforward,the trackingforce increases. The tracking force

can be increased to a maximum of 3.0 grams with the middle sliding counterweight pushed all the way

forward to the headshell end of the tonearm (each step is equivalent to 0.5 grams x 6 steps, making 3

grams).

e) The auxiliary weight is 1.5 grams (see 5 below). If more than 3 grams of tracking force is needed, as

might be the case when playing 78 rpm records, place the ancillary weight in the hole as illustrated in

the drawing (see 5 below). Only use this auxiliary weight if additional trackingforce is needed! If it is

not needed, store it away in a safe place.

Example: If the tracking force needed is 3 grams, set the middle sliding counterweight at the mark for 3 grams

on the weight gauge. If more than 3 grams of tracking force is needed, use the auxiliary weight of

1.5 grams, along with the counterweight, in order to secure your desired tracking force. For

instance, the ancillary weight of 1.5 grams, plus 2.5 grams of tracking force set by the middle

sliding counterweight, is equivalent to 4 grams total tracking weight.

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Note: Because the tracking force mechanism (#4 above) of SA-1.2is differentfrom a standard counterweight

system, the use of a separate VTF gauge for precise fine-tuning is recommended. The relative accuracy of

the SA-1.2tracking force mechanism is somewhat affected by the complex interaction of the mass of the main

counterweight, its position, the mass of the cartridge, and the mass of the headshell. So, as is usual with all

tonearms, you should verify the desired tracking force with a calibrated VTF gauge.

4) Auxiliary counterweight stem

In case the standard counterweight is not heavy enough to balance your cartridge/headshell combination, an

additional counterweight stem has been supplied to give additional mass, and greater range of adjustment.

a) Remove the counterweight and headshell, setting them aside in a safe place.

b) Inspect the threads on the auxiliary counterweight stem. If there is any debris, please brush it with a

small paint brush, or clean toothbrush. Debris can cause the threads to become stuck.

c) Attach the auxiliarystem by carefully threading clockwise into the main stem. The threads are normal

“right-hand threaded”.

d) Tighten firmly with your fingers, but donot apply aggressive force. Do not use awrench, or other tool

that would apply too much force on the bearings. Do not use thread-locking compound (removal

would require excessive force). Finger-tighten only!

e) The auxiliary counterweight stem provides two methods of counter-balancing heavier cartridges and

headshells.

(1) The weight of the auxiliary stem provides additional force.

(2) The stem also provides much greater range of adjustment of the main counterweight (thezero-set

counterweight).

5) Anti-skating (bias) adjustment

a) Set the bias adjustment knob to the same number as the tracking force. Some experimentation may

be necessary based on the specific stylus profile used by the cartridge.

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6) Converting between “Positive”and “Negative”Counterweight stub

There are two counterweight stubs supplied with the the SA1.2BCS. Inscribed on the back of both

stubs will be “P”or “N”. P is for Positive, a reference to positive balance. “N”is for Negative, a

reference to negative balance. The inscription faces the tonearm Arm Bearing Box, and is not seen

during operation. Refer to the SA1.2BCS brochure to learn about the benefits of positive versus

negative balance.

Abbreviations:

·Arm Bearing Box = ABB

·Cueing Device Base = CDB

·Arm Main Pillar = AMP

·Anti-Skating = AS

A) When you unpack the SA1.2BCS, you are suggested to confirm counterweight shaft is in Negative

position. The horizontal shaft of the “Positive Balanced”stub will be lower, compared to the shaft of the

main arm wand. The horizontal shaft of the “Negative Balanced”stub will be at the same horizontal

plane as the main arm wand. In the picture below, notice that the shaft is lower than the horizontal

plane of the main arm wand (this is the “Positive Balanced”stub);

B) Prior to start operation to change the stub to “Positive Balance”, make sure the arm is in the arm rest,

the cueing device is in the “down”position, and turn over the tonearm on a soft surface to prevent

scratches. You must return retain this configuration after the installation of the new counterweight stub;

The two counterweight

stems are etched

with a "P" and "N" to differentiate the two.

The difference in center-of-

balance is due to

where the hole is machined that holds the

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C) Please note in the third illustration, there is a very fine nylon string betweenAnti-Skating device and

tonearm Main Pillar. It should never be cut, even by accident, during this tonearm stub changing

operation;

D) Unscrew the two Allen head set-screws that secure the Cueing Device Base. Lower the CDB

down the Arm Main Pillar. If the arm is brand new and never used, there will be nylon tubing around the

AMP to protect its surface. You must lower or remove it before lowering the CDB;

E) The 5th photo shows the CDB position after lowering down the AMP. This allows room to insert the

Allen key for unscrewing the set-screws;

Starting Position

Delicate nylon string

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F) Do not lower the CDB too much since you could break the nylon string or even damage the Anti

Skate device;

G) Insert Allen key into Allen head set-screws;

H) After unscrewing 2 screws, carefully pull the stub from ABB.

I) Prepare the other Balance Stub.

K) After changing counterweight stub in ABB, follow steps F~A, in reverse order. The tonearm

should appear the same as the first caption labeled “starting position”.

Removing Allen Head screws from

stem

Prepare next counterweight stem

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