Thorens btd 12 s brochure

Page 1

THORENS BTD - 12$ Professional

with exclusive cueing control
for lowering and raising arm

The THORENS BTDJ'ZS tone arm is a classic example of Swiss
craftsmanship. Designed for lowest possible inertia and friction. in
both horizontal and vertical planes. the llTll-IZS is ideal for pickup
cartridges of the highest lateral and vertical compliance. The low
inertia minimizes force on the stylus from warped and oil-center
records. assures positive contact between stylus and record groove.
and reduces distortion as well as record and stylus wear to a minimum.

Despite its very compat't. size. the BTU-12$ has less tracking error
than many 16" arms mnly 0.5 per inchr. Special pivot design elimi-
nates another source of distortion found in ordinary arms by keeping
stylus perpendicular to the record at all times. The knob adjustment
for stylus force 'calihi'ated in it aims» and the record-saving. stylus-
saving are unequaled for convenience.

OUTSTAN DING FEATURES

° Cuelng device-A built-in provi-
sion rueznkr device raises and lowers
the arm over the record when a 'nlltli
is turned. When lifted. the arm is
given a slight loraltinyf action to law-p
the stylus over the groove. 'hen
lowered, the arm is coiiipleto.-ly frei-
of any interference from the cneini:
(lLVlL'If.

. Tracking error llnly (v.3 lllt'll
maximum with optzmum stylus over-
hang.

' Bearings-Precision ball hearings
on both axes reduce friction (lateral
and \ertiiall to the order of 1 1"
gram.

° Exclusive pivot design - ldeall).
the stylus axis should remain in a
\ertiral plane, defined by the stylus
and the tangent to the record groove,
for all up-and-dmvn movements of
the arm. in ordinary arms. this is
imposgthle because the axis of the
hearing for up-and-down motion is
si- at right angles to the straight
part of the arm. This causes the
ordinary arm to rant" or lean the
Stylus to one side when in any posi-
tion other than perfectly horizontal.
The BTU-1:2.q eliminates this source
of distortion by setting the hearing
at an angle to the straight part of
the arm. The stylus in the BTUJJS
thus never leans to either Side for
any height adjustment. any warped
record.

Balancing-\Vith stylus force ad-
justment. set to ll, the cmuitn-ryveiulit
will balanre the arm. with a 5-!!!
gram (.18~.~.7 oz.) cartridge in-

stalled. in both horizontal and verti-
cal planes. Then. since stylus force
is applied by a spring at any other
Setting: of the adjustment. the arm
remains in balance and is insensi-
tive to out-of~lt-\'el tables or floor
vibrations.

' Stylus force adjustment-Cali-
brated in grams on a lnrgrnentzraved
scale for l to 8 grams with zero
position for halnneinu.

' Low-frequency resonance - Below
audible range. Dampingmaterial iso-
iatns counterweight to prevent other
undesirable resonances in audible
range.

' Plug-in shells-An aluminum plug-
in shell ill cominmlates any standard
cartridge and crimes \vith mounting
hardware. .~\ -l-pin (plus urnundl
connector provide-i electrical connec-
tions. A sermv-swtired slide on the
shell permits easy, preciSe adjust-
ment a! stylus overhang.

' Cables Two shielded rabies Zlf'"
tone meter) long. with standard
phone connectors. and a separate
ground wire are supplied. No sol-
dering is necessary.

DIMENSIONS AND GEOMETRY

0 Overall length: 12%"

0 Height: 5%"overall; lifmax. above
playing surface

0 Distance, pivot to table center: 7%"

0 Optimum stylus overhang: ll 16"

- Range of overhang adjustment: "2"

' Height adjustment range: 151:"

Tone Arm