Chippmann CS-8 ol HDH6 User manual

CS-8 Series ol
Owners manual
HDH6 / VDL6

CS-8 ol HDH6/VDL6 Rev1.04, Feb. 2015
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User man al by Carsten Schippmann
Graphic design CS-8 Series: Carsten Schippmann
Concept and development: Carsten Schippmann
English translation by Carsten Schippmann
Contact:
Schippmann electronic m sical instr ments
Dipl.-Ing. Carsten Schippmann
Wartb rgstr. 8
D-10823 Berlin
Web: www.schippmann-m sic.com
Email: info@schippmann-m sic.com
The man fact rer Schippmann electronic m sical instr ments is constantly
striving for improvements and developments of their prod cts. Therefore, we
reserve the right to change technical specifications which improve o r
prod cts at any time witho t notice. This incl des the look of the nit which
might differ from pict res in this man al.
No part of this p blication is to be reprod ced, transmitted, transcribed or
translated in any form or by any means whatsoever witho t written
permission by
Schippmann electronic m sical instr ments .
 2014, Schippmann electronic m sical instr ments, errors excepted, s bject
to change witho t prior notice.

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PREFACE
First of all, congrat lations on the p rchase of this 3U e ro rack synthesizer
mod le. This man al contains a condensed description of the f nctionality
and addresses sers with a certain level of elementary technical knowledge.
The c rrent CS-8 ol series determines generally prod cts, which are realized in
a so-called "open loop" design. These are electronic circ its working witho t
high amplification amplifiers and then stabilizing and linearizing feedback
loops. In earlier times (1970s years) these techniq e were widely sed. Typical
so nd properties are feat red by warmth and creaminess.
In this man al the first two prod cts will be described, namely the voltage
controlled filters (VCF) HDH6 and VDL6. HDH6 stands for Horizontal Diode
High-pass with 6 poles in the transfer f nction, which means a maxim m
slope of 36 db/octave. Accordingly to this VDL6 stands for Vertical Diode Low-
pass with also a slope of 36 db/octave. Each of these filters is contr cted as a
tr e dual filter containing two identical and independent filters A and B. Each
filter, A and B, provides 4 sim ltaneo s o tp ts with different slopes, which
are clearly different in so nd. By mixing and/or s btracting and/or sharing of
the overall 8 o tp ts one obtain mighty m sical, creative possibilities. The
mod le is designed with a width of 19 PU (part nits, 1 PU=5.08mm) for
installation into a 3 HU (height nits) mod lar rack with a b ilt in ±12 V power
s pply.
F rthermore the mod le is eq ipped with CV (Control Voltage)-inp ts for
c toff-freq ency (FREQ) and resonance (RESO), separately for each channel
that tr e and independent d al/stereo a dio operating is possible.
Design and implementation meet highest technical standards concerning
sability, so nd q ality, and electromagnetic imm nity. The entire design and
prod ction work was done in Germany.
Made in Germany

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1 WARRANTY .........................................................................................................................4

1 1 Limited Warranty ....................................................................................................4 
1 2 Terms of Warranty ..................................................................................................4 
1 3 Warranty transferability ......................................................................................4 
1 4 Claim for damages ..................................................................................................4 
2 CE AND FCC COMPLIANCE STATEMENTS ...............................................................5 
3 DISPOSAL ............................................................................................................................5 
4 SAFETY INSTRUCTIONS .................................................................................................5 
5 MAINTAINANCE/ CLEANING ........................................................................................6 
6 GETTING STARTET............................................................................................................7 
6 1 Unpacking ..................................................................................................................7 
6 2 Installation .................................................................................................................7 
7 CONTROLS ...........................................................................................................................8 
7 1 Front panel .................................................................................................................8 
7 2 Backside ................................................................................................................... 12 
7 3 Initial operation .................................................................................................... 13 
7 4 Calibration .............................................................................................................. 13 
8 MODULE DESCRIPTION ............................................................................................... 14 
8 1 Layout and functions......................................................................................... 14 
9 1 Specifications (generally) ................................................................................. 18 
9 2 Ratings ...................................................................................................................... 18 

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1 WARRANTY
1 1 Limited Warranty
Schippmann electronic m sical instr ments warrants the mechanical and
electronic components of this prod ct for a period of two (2) years from the
original date of p rchase, according to the warranty reg lations described
below. If the prod ct exhibits any fa lts within the specified warranty period
that are not excl ded from this warranty,
Schippmann electronic m sical
instr ments shall, at its discretion, either replace or repair the prod ct. This
warranty exists in addition to the general terms of b siness of the
man fact rer Schippmann electronic m sical instr ments .
1 2 Terms of Warranty
Schippmann electronic m sical instr ments reserves the right to exec te
warranty services only if the prod ct comes with a copy of the dealer’s original
invoice. Final discretion of warranty coverage lies solely with
Schippmann
electronic m sical instr ments . Any Schippmann electronic m sical
instr ments prod ct deemed eligible for repair or replacement nder the
terms of this warranty will be repaired or replaced within 30 days after
receiving the prod ct at Schippmann electronic m sical instr ments .
Damages or defects ca sed by improper handling or opening of the nit by
na thorized personnel ( ser incl ded) are not covered by this warranty.
Prod cts which do not meet the terms of this warranty will be repaired
excl sively at the b yer´s expense and ret rned C.O.D. with an invoice for
labo r, materials, ret rn shipping, and ins rance. Prod cts repaired nder
warranty will be ret rned with shipping prepaid by
Schippmann electronic
m sical instr ments
. Outside Germany, products will be returned at the
buyer´s expense.
1 3 Warranty transferability
This warranty is extended to the original p rchaser and cannot be transferred.
No other person (retail dealer, etc) shall be entitled to give any warranty
promise on behalf of
Schippmann electronic m sical instr ments .
1 4 Claim for damages

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Schippmann electronic m sical instr ments does not accept claims for
damages of any kind, especially conseq ential loss or damage, direct or
indirect of any kind however ca sed. Liability is limited to the val e of this
prod ct. The general terms of b siness drawn p by Schippmann electronic
m sical instr ments apply at all times.
2 CE AND FCC COMPLIANCE STATEMENTS
This device has been tested and deemed to comply with the DIN EN 60065
standards.
This device has been tested and deemed to comply with the req irements,
listed in FCC Reg lations, part 15. The device complies with EN 55103-1 and
EN 55103-2 standards.
Beca se of the entirely analog e constr ction, this device does not generate
radio freq encies and will not interfere with radio freq encies generated by
other electronic devices.
3 DISPOSAL
This device has been man fact red to RoHS-standards, in compliance with the
req irements of the E ropean parliament and co ncil and is th s free of lead,
merc ry, and cadmi m.
!! Notice: This product is still special waste and is not to be disposed of
through regular household waste !!
For disposal, please contact your local dealer or Schippmann electronic
musical instruments
4 SAFETY INSTRUCTIONS
BEFORE USING THIS PRODUCT FOR THE FIRST TIME, PLEASE READ THE
ENTIRE USER MANUAL THOROUGHLY

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•PLEASE AVOID SHARP BENDING OF ANY CORDS AND CABLES.
•CORDS SHOULD NOT BE INSTALLED WITHIN THE REACH OF CHILDREN
OR PETS.
•DO NOT TREAD THE ENCLOSURE OF THE PRODUCT, DO NOT PLACE
HEAVY OBJECTS ON IT.
•BEFORE REMOVING THE PRODUCT FROM THE RACK, PLEASE
DISCONNECT THE POWER PLUG AND ALL OTHER CABLE
CONNECTIONS.
•PLEASE DISCONNECT THE POWER PLUG FROM THE OUTLET IN CASE OF
A THUNDERSTORM.
•NEVER OPEN THE ENCLOSURE OF THE PRODUCT! NEVER TRY TO
MODIFY THE INTERNAL CIRCUITRY! ONLY QUALIFIED SERVICE
PERSONNEL IS ALLOWED TO OPEN THE ENCLOSURE.
•DO NOT PLACE OPEN FIRE ON TOP OF THE PRODUCT (CANDLES, ASH
TRAYS, HOT THAI CURRIES ETC).
•NEVER EXPOSE THE PRODUCT TO WATER, BEER, OR MOISTURE.
•ADULTS ARE TO MAKE SURE THAT CHILDREN FOLLOW ALL SAFETY
INSTRUCTIONS. SAME THING GOES FOR PETS.
•AVOID MECHANICAL STRESS OR IMPACT. DO NOT DROP THE PRODUCT;
EVEN IF THERE IS A CONTROL LABELLED "DROP"!.
•DO NOT USE THE PRODUCT WITH TOO MANY OTHER ELECTRONIC
DEVICES RUNNING FROM ONE SINGLE OUTLET, ESPECIALLY IN
CONNECTION WITH EXTENSION CORDS. DO NOT ATTEMPT TO SAVE
MONEY ON CHEAP SOLUTIONS. BUY PROPER HIGH-DUTY POWER
DISTRIBUTORS AND CORDS!
•NEVER USE EXTENSION CORDS WITH LESS MAXIMUM LOAD THAN THE
TOTAL POWER CONSUMPTION OF ALL DEVICES CONNECTED TO A
SINGLE POWER OUTLET COMBINED. OVERLOADING EXTENSION CORDS
CAN CAUSE FIRE.
•AVOID MECHANICAL STRESS ON SOCKETS AND KNOBS SWITCHES.
•PROTECT YOUR SPEAKERS AND EARS (!) AGAINST EXCESSIVE AUDIO
LEVELS. THE CS-8 PHS-28 UNIT IS CAPABLE OF GENERATING
EXTREMELY LOW AS WELL AS EXTREMELY HIGH FREQUENCIES. BOTH
MIGHT CAUSE SERIOUS DAMAGE TO AUDIO EQUIPMENT AND EAR-
DRUMS!
5 MAINTAINANCE/ CLEANING

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•BEFORE CLEANING THE PRODUCT, PLEASE DISCONNECT THE POWER
PLUG FROM THE OUTLET OR DISCONNECT THE MODULE FROM ITS
POWER CONNECTOR BY PULLING THE FLAT RIBBON CABLE.
•USE A DRY OR SLIGHTLY MOIST CLOTH OR COMPRESSED AIR FOR
CLEANING. NEVER USE ANY CLEANER OR THINNER (E.G. PAINT THINNER
OR ACETON). PRINTS AND PAINTWORK WILL IMEDIATELY BE
DESTROYED!! ALSO AVOID ALCOHOL (ISOPROPYLIC), GAS, SPIRITS
(SCOTCH SINGLE MALTS, FOR A START) OR ABRASIVE HOUSEHOLD
CLEANERS!
6 GETTING STARTET
6 1 Unpacking
The box sho ld contain the following items:
- 1 x CS-8 ol HDH6/VDL6 3HU rack-mo nt mod le
- 1 x Ribbon cable (20 cm length with two 16 pole IDC-connectors)
- 4 x M3 screws
- 4 x polypropylene washers
- This owners’ man al
If the content of the box t rns o t to be incomplete, please get in to ch with
yo r dealer or
Schippmann electronic m sical instr ments immediately. In
case of damage ca sed in transit, please get back to the responsible carrier
and
Schippmann electronic m sical instr ments immediately. We will s pport
yo in this case.
6 2 Installation
Place the nit on a clean, dry and st rdy s rface, or se a s itable keyboard
stand or 19” rack. For 19” rack mo nting, a s itable rack (3U E rorack with +/-
12V power s pply rails) is req ired. The HDH6/VDL6 ses discrete all-analog e
electronics. Th s certain parameters, s ch as Freq ency and Resonance may
be temperat re-sensitive. We recommend placing the mod le away from heat
so rces s ch as radiators, lamps or other nits that prod ce heat (e.g. power
amps or internal power s pplies).

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7 CONTROLS
7 1 Front panel
Fig. 1a and 1b shows the front panel with consec tively n mbered controls
and jacks for the mod les HDH6 and VDL6.

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Fig. 1a HDH6 front panel

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Fig. 1b VDL6 front panel

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1. Input A control – atten ates the incoming a dio signal at Inp t A jack
(VCF A) between -∞ dB and 0 dB
2. Input B control – atten ates the incoming a dio signal at Inp t B jack
(VCF B) between -∞ dB and 0 dB
3. Freq control – adj sts the c toff-freq ency for both channels between 2
Hz and 42 kHz
4. Det B control – det nes the c toff-freq ency of VCF B over ±3.6 octaves
(x12 resp. ÷12)
5. Reso control – adj sts the resonance of the phaser (Q-factor) between
zero (1) and self-oscillation (∞) for both filters
6. Det B control – "det nes" the resonance (Q-Faktor) of VCF B abo t ± 1/3
of the total range
7. Drp A control – adj sts the gain loss (drop) of the filter o tp ts within the
pass band of the filter with increasing resonance for VCF A
8. Drp B control – adj sts the gain loss (drop) of the filter o tp ts within the
pass band of the filter with increasing resonance for VCF B
9. Input A jack (inp t) – a dio inp t VCF A
10. Input B jack (inp t) – a dio inp t VCF B
11. CV A jack (inp t) – non inverting CV-inp t for controlling the c toff-
freq ency VCF A (0.5 V/oct., non-calibrated)
12. CV B jack (inp t) – non inverting CV-inp t for controlling the c toff-
freq ency VCF B (0.5 V/oct., non-calibrated)
13. Res A jack (inp t) – CV-inp t (±5V) for controlling the resonance of VCF A
14. Res B jack (inp t) – CV-inp t (±5V) for controlling the resonance of VCF B
15. 6 db jack (o tp t) – 6 db/oct. a dio o tp t VCF A
16. 6 db jack (o tp t) – 6 db/oct. a dio o tp t VCF B
17. 12 db jack (o tp t) – 12 db/oct. a dio o tp t VCF A
18. 12 db jack (o tp t) – 12 db/oct. a dio o tp t VCF B
19. 18 db jack (o tp t) – 18 db/oct. a dio o tp t VCF A
20. 18 db jack (o tp t) – 18 db/oct. a dio o tp t VCF B
21. 24/36 db jack (o tp t) – 24 or 36 db/oct. a dio o tp t VCF A
22. 24/36 db jack (o tp t) – 24 or 36 db/oct. a dio o tp t VCF B
23. Slope 2-pos. toggle switch – selects the slope at the o tp t jacks 21 and
22 (24 db/oct. or 36 db/oct.)

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7 2 Backside
Fig. 2 shows the back of the mod le with consec tively n mbered elements.
Fig. 2 backside of the mod le
1. Freq A trimmer P1 –calibration of c toff-freq ency VCF A
2. Res A trimmer P2 – calibration of starting point of self-oscillation VCF A
3. FTR A trimmer P3 – calibration of the resonance-mod lation feed-tro gh
of VCF A
4. Freq B trimmer P4 – calibration of c toff-freq ency VCF B
5. Res B trimmer P5 – calibration of starting point of self-oscillation VCF B
6. FTR B trimmer P6 – calibration of the resonance-mod lation feed-tro gh
of VCF B
7. 16 Pin power supply-box header
8. IC A - pinned d al VCF mod le PCB

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7 3 Initial operation
The power connector’s (8) pin-o t in top view (refer to fig. 2) is assigned as
follows:
Bottom to top, left to right. Th s pin 1 is located at bottom left, pin 2 above pin
1 etc. Pin 15 is at bottom right, pin 16 at top right.
Pin 1, 2 = -12 V (labeled with a triangle)
Pin 3-8 = GND (regarding gro nd, 0 V), located o tward on all jacks
Pin 9, 10 = +12 V
Pin 11-16 = not connected
To hook p power to the mod le, connect one of the IDC-connector of the
incl ded flat ribbon cable to the box header (refer to fig. 2). Observe g ide key
for the polarity of the connector in order to avoid pin reversal. The red tag of
the cable is to match the triangle-label.
7 4 Calibration
All trimmers are 12 ga ge trimmers, i. e., 12 t rns are needed to cover the
entire range. the trimmers P1, P2, P4 and P5 increase their parameters when
t rned clockwise. The feed-thro gh trimmers P3 nd P6 are zero-adj stment
trimmers and sho ld better be nto ched!
Note: This is a complex full analogue working circuit, where scattered
parts will heat up more or less Moreover big capacitors with large time
constants need time to charge This causes to a so-called transient where
the device achieves its final state
Clear text: "Frequency" and "Resonance" will drift more or less after a cold
start and achieves after 3 minutes about 95% of the as last set values

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8 MODULE DESCRIPTION
8 1 Layout and functions
Inp t A
VCF A
Amp
ΣStage
1
Stage
2
Stage
3
Stage
4
VCA
Drp A
Stage
5
Stage
6
Σ
Amp
Amp
Amp
6 db
12 db
18 db
24/36 db
Slope
Reso
Inp t B
VCF B
Amp
ΣStage
1
Stage
2
Stage
3
Stage
4
VCA
Drp B
Stage
5
Stage
6
Σ
Amp
Amp
Amp
6 db
12 db
18 db
24/36 db
Slope
Det B
Freq
Det B
Fig. 3 Str ct re of HDH6/VDL6
Fig. 3 shows the str ct re of the filters HDH6/VDL6. The CV-control jacks 10-14
for c toff and resonance were omitted.
Input: The a dio inp ts are signed with Inp t A and Inp t B , these are p re AC
inp ts. The controller
Inp t A (1) and Inp t B (2) are tied capacitively
deco pled to their inp t jacks of the same name. The controller atten ate the
incoming a dio between 0 and 1.

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Freq: The infl encing variables on this parameter will change the c toff-
freq ency. That is the freq ency where the phase-shift at stage 6 is 180°. The
damp at this freq ency will increase for higher stages. The controller
Freq (3)
affects both filters and provides a range from 2 Hz to 42 kHz. By additional
external CV-voltage at jack 11 resp. 12 the c toff-freq ency can be driven p
to 80 kHz. This co ld be sef l to f ll open the VDL6 to get at stage 6
minim m damp at high a dible freq encies or to get at stage 1of the HDH6
maxim m damp at lower freq encies. Vice versa relationships we get at corner
freq encies aro nd 2 Hz or less (possible by additional negative CV-voltages)
to obtain maxim m damp at stage 1 for the VDL6 for higher freq encies or to
get minim m damp at stage 6 of the HDH6 for lower freq encies. For diode
filters the damping starts very early and affects the a dio spectr m slowly
more and more. So, the damping c rve is very smooth, different to typical de-
co pled 4-pol-filters. The controller
Det B (4) (det ne) only affects the c toff-
freq ency of VCF B and provides a det ning of abo t ±3.6 octaves (x12 resp.
÷12). The regarding control inp ts for the c toff-freq ency are the jacks CV A
for VCF A and CV B for VCF B with a sensitivity of abo t 2 octaves/volt resp. a
scale of abo t 0.5 V/oct.. These inp ts are non-calibrated.
Reso: The infl encing variables on this parameter will change the self-
resonance of the filters p to self-oscillation. With increasing resonance the
filters become more and more selective aro nd the c toff-freq ency and gain
the freq encies of the incoming a dio at this point. The controller
Reso (5)
provides a range of no selectivity ( Reso = 0) p to self-oscillation ( Reso > 7).
The regarding control jacks are Res A (13) and Res B (14) . For a f ll sweep of
this parameter a voltage range ∆V of 5 volts is necessary. Depending on the
controllers' position Reso in one case -5 V are necessary to bring the resonance
back to zero for f ll clockwise position and +5 V to achieve "10" for co nter
clockwise position of
Reso . The controller Det B (6) affects only VCF B and
"det nes" the resonance abo t ±1/3 of the f ll range.
Drp A, Drp B: Many filters are bringing along to increasing resonance val es a
concomitant damp of freq encies within the pass band. This gain loss or drop
can be adj sted with the controllers Drp A (7) resp. Drp B (8) for the filters A
and B, separately, between -24 db and 0 db for HDH6 and between -25 db and
0 db for VDL6. Fig. 4a ill strates the high-pass f nction, the resonance and the
drop for the HDH6 whereas Fig. 4b shows that for the VDL6.

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level [dB]
c toff-freq ency
high-pass-
function
signal freq ency
emergence
of a
resonance peak
level [dB]
resonance
drop /
gain loss
signal freq ency
c toff-freq ency
high-pass-
function
Fig. 4a HDH6 high-pass f nction, resonance and drop
level [dB]
low-pass-
function
signal freq ency
emergence
of a
resonance peak
level [dB]
resonance
drop /
gain loss
signal freq ency
low-pass-
function
c toff-freq ency c toff-freq ency
Fig. 4b VDL6 low-pass f nction, resonance and drop
Note: With t rning the controller Drp A/B from f ll CCW to the right (0 db) the
distortion of the a dio o tp t will increase very fast even with little resonance
val es. Th s, a very sensitive and specific control of the character of the o tp t
signal is possible with that.

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6 db, 12 db, 18 db, 24/36 db A/B-output jacks: The jacks (15-22) provides
the different slopes at the filter stages 1, 2, 3, 4 and 6 (see Fig.3). The slope
switch (23) selects for both filters VCF A and VCF B commonly the stage 4 (24
db/octave) or stage 6 (36 db/octave) for the o tp t jacks 21 (VCF A) and 22
(VCF B). Fig. 5 ill strates for the HDH6/VDL6 different slopes.
signal freq ency
level [dB]
c toff-freq ency
VDL6
level [dB]
c toff-freq ency
HDH6
signal freq ency
6121836 6121836
slope [db/octave] slope [db/octave]
Fig. 5 HDH6/VDL6 slopes
Note: S btracting of an o tp t with a higher slope from one with a lower
slope, regardless whether within the same filter A or B (intra) or between two
filters (inter) (e.g. 6 db (A) min s 12 db (B)) will res lt into band-passes. With
the inter-variant the band with can be adj sted by the two c toff-freq encies,
additionally.
Restriction: With these s btractions for the HDH6 the new won low-pass slope
is always 6 db/oct., whereas the high-pass slope will have the slope of the
higher slope o tp t (e.g. 6 db - 18 db = band-pass 18/6 db/oct.). With the
VDL6 the relationships t rns aro nd (e.g. 6 db - 18 db = band-pass 6/18
db/oct.)

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9 TECHNICAL SPECIFICATIONS AND RATINGS
9 1 Specifications (generally)
Inp t- and o tp t jacks: mono jack sockets 3.5 mm (1/8")
All inp t jacks provides a switching contact to gro nd.
Power s pply: -12 V / +12 V (polarity
protection)
Power cons mption: typ. 200 mA (for each s pplies
±12 V)
Ambient temperat re: 0 °C – +55 °C 7 32 F - 131 F
Net weight (mod le only): approx. 200 g
max. dimensions (W x H x D): 19 PU (96.2 mm) x 128.5 mm x
54 mm
Installation depth (behind the panel) <37 mm
9 2 Ratings
Maxim m inp t voltage at jacks (9-14): ±15 V
!! Permanent DC-voltage at jacks 9 and 10 are NOT allowed - these are
pure AC-inputs !!
O tp t noise at the stages (filter open, resonance=0/resonance=high):
6db/Okt.: <10/30 µVrms ≅ -100/90 dbV
12db/Okt.: <10/30 µVrms ≅ -100/90 dbV
18db/Okt.: <10/20 µVrms ≅ -100/94 dbV
24db/Okt.: <10/20 µVrms ≅ -100/94 dbV
36db/Okt.: <15/15 µVrms ≅ -96/96 dbV