Acoustical Systems UNI P2S User manual
owner’s manual
UNI P2S
©
Universal high-precision phono
pivot-to-spindle -
P2S direct measuring instrument
2
General note:
Technical data, minor design and specications are subject to change
without prior notice.
version 16.02
DISCLAIMER
Please use all parts with care.
The use of the UNI-P2S is on your own risk.
The manufacturer and the designer do not take any
responsibility for possible damage or injury due to
operate or handle the UNI-P2S or any of it’s parts.
Keep out of reach of children !!
3
The UNI-P2S is a high-precision and universal
versatile positioning and measuring instrument for
use with phono tonearms turntables. It allows
precise measurement of mounting distance -
P2S or pivot-to-spindle distance - of any given
tonearm.
Furthermore the user can determine whether a
given mounted tonearm does meet the mounting
distance required or asked for in it’s specications
- i.e. whether it is correct mounted.
This applies to all pivot tonearms – no matter
what effective length, mounting distance or
specic geometry a given tonearm may ask for.
The UNI-P2S further gives the options to:
- draw an arc of suitable mounting distance on a
plinth/armboard to nd the optimal position(s)
of a to-be-mounted tonearm.
- mark a drilling hole with the sharp tip of the
stainless steel pin.
- locate perfect center of tonearm - either with tip
of pin or (if center isn’t visible without question)
center the outer dimensions of bearing house by
using the cross-hairs on the reticule.
The UNI-P2S works DIRECT with the following
alignment tractors:
- UNI-Protractor
- Mint LP
- Wally
- Dennesen Soundtraktor
- Schön template 1 and 2
A brief introduction
This means you can use the UNI-P2S mounted
WHILE any of the above mentioned protractors
are in use and thus checking mounting distance
“on-the-y” - while aligning the tonearm/
cartridge.
It further offers precise help with some protractors
so you can determine the proper orientation of
help lines towards the pivot.
To ensure the high precision the UNI-P2S comes
with a special designed vernier scale.Thus giving
an accuracy in read-out of 5/100 mm.
Precise P2S distance is impossible without precise
centering.
The UNI-P2S works with the 3 spindle adapters
and the stainless steel locator pin with cross lines
of the UNI-Protractor to ensure perfect center
without play.
Each UNI-P2S was carefully checked and tested
prior to shipment.
Please do get yourself familiar to the handling and
use of the UNI-P2S.
While it is a mechanical positioning instrument, it
needs a minimum of attention to detail by the user
to obtain the maximum precise results it ensures if
handled correctly.
To get access to all possible features of the UNI-
P2S it is inevitable to read this manual. But most
important please study the step-by-step pictured
instruction to learn how to set-up the UNI-P2S
correctly.
4
Step 1
Select the spindle adapter which ts on your
turntable’s spindle WITHOUT play. This ensures
perfect center for the measuring.
Setup
Step 2
Place the selected tt-spindle adapter over the turn-
table’s spindle. It should t without any play.
Step 3
Place the “clamp-opening” on the UNI-P2S
acrylic arm over the tt-spindle adapter.
Step 4
It will give a frim, tight “grip” - yet it will allow
“free” circular movement around the spindle.
5
Step 5
Adjust the clearance underneath the acrylic arm,
so that the acrylic arm is horizontal.
Step 6
Slide the UNI-P2S into place in the direction of
the tonearm’s bearing house/pivot.
Step 7
Do mount the long stainless steel positioning pin
with the reticule either on top or pointing down-
ward into the nylon tunnel. It will t quite tight
- handle with care, as the tip is sharp and may
cause injuries. Do untight the black screw on the
POM-block carrying the metric scale. Slide the
metric arm with the pin toward the center of the
arm bearing house.
If you can spot the center, use the pin-point.
Try to locate pin exact over the pivot center.
If unsure of pivot center, do use the reticule and
determine pivot center by nding symmetrical
outer lines on the bearing house.
Step 8
When pivot center is directly underneath the pin,
do fasten the screw holding the metric scale in
place.
Now look on the scale on the POM block.
6
231.5 mm P2S - the white “5” being in line.
Perfect mounting distance for the FR-64s.
This is 295,00 mm P2S - suitable for a FR-66s.
This is 247,35 mm - the P2S for the Talea
tonearm.
This is exactly 231 mm - the black line in center.
Reading the
vernier scale
The UNI-P2S does feature a vernier scale to
allow precise read-out of mounting distance with
an accuracy of 5/100 mm.
This vernier scale is running right to left - as does
the metric scale with increasing distance of P2S.
If you are unfamiliar with a vernier scale, please
get accustomed to it’s operation.
The white numbers 1- 9 over the black back-
ground are 1/10 of a mm each. The white lines
between numbers are 0.5/10 mm each - or 5/100
mm each.
Whenever any of the white lines is absolutely
in-line with a black line on the aluminum scale,
then it denominates the 5/100 value which has to
be added to the full mm value given between the 2
white “leaves” centered by the full vertical white
line on the left of the scale just before the half-
circle end.
To illustrate the read-out procedure, here are a
few examples of mounting distances for common
tonearms.
One will accustom quite fast to this way of
reading the scale.
The vernier scale is an international standard in
industrial precision analog measuring.
This is 215,25 mm P2S - for the DaVinci 9” tone-
arm. Note that the white line between “2” and “3”
in in-line with the black line above on the alu-
minum scale. This means 215 mm PLUS 25/100
mm. Resulting in 215,25 mm P2S. The vernier
scale “adds” the 5/100 mm value to the full mm
read-out on the large metric scale.
7
Pin, Pen or Reticule
Insert a pen
You may use a 3 mm diameter pen which will t
into the 3 mm through hole when insert from the
downside and with the open end of the pen rst.
Draw an arc
You now may adjust height and draw and arc on
your armboard/plinth.
That arc gives all prospective positions for
mounting the respective tonearm with the desired
mounting distance.
Drilling hole
You may use a small hammer and a low force hit
on the gun metal cap holding the reticule to mark
a drilling hole in the armboard .
8
Some manufacturer’s specications/values for
popular pivot tonearms:
Breuer series 7 & 8: 231,4 mm
DaVinci 9”: 215,4 mm
DaVinci 10”: 237,8 mm
DaVinci 12”: 295,6 mm
Dynavector - all - : 226,0 mm
Fidelity Research
FR-64s: 230,0 or 231,5 mm
FR-66s: 295,0 mm
Graham 9”: 217,4 mm
Ikeda IT-245/345: 230,0 mm
Ikeda IT-407: 295,0 mm
Micro Seiki
MAX-237: 222,0 mm
MA-505: 222,0 mm
MAX-282: 270,0 mm
Ortofon 212: 212,0 mm (sic)
309: 309,0 mm
AS-212: 214,0 mm
AS-309: 311,0 mm
Pioneer/Exclusive: 269,5 mm
SAEC 407: 221,0 mm
308: 235,0 mm
308L: 265,0 mm
Reed 3Q 9,5”: 223,0 mm
10,5”: 251,6 mm
12”: 295,6 mm
SAEC 506: 286,0 mm
WE-8000: 293,0 mm
SME Series V: 215,35 mm
3012: 294,0 mm
Talea 247,37 mm
Technics all EPA-series: 235,0 mm
Tri-Planar 233,5 mm
Please note
these are all values given by the manufacturer !!
The alternative 231.5 mm for the FR-64s however
is a personal recommendation.
We see that some manufacturer’s (SME V ,
Talea ...) do ask for very specic and very precise
mounting distance.
manufactured and assembled in Germany
by acoustical systems
email: [email protected]
www.acoustical-systems.com
Some P2S value
Other Acoustical Systems Measuring Instrument manuals
