INTRODUCTION
Thank you for your purchase of the Rolls RP147 Rotorhorn. The RP147 is a line
level rack mount signal processor for duplicating the sound of a rotating horn
speaker cabinet electronically. It has two-way crossover network as well as
simulated bass and treble “rotors”. It may be controlled by the front panel, remote
foot switch or MIDI program changes and is housed in a single space 19" painted
steel chassis. the RP147 is intended for live performance or studio work, it is
simple to use and is ready to work upon power up.
Features
> Accurate simulation of “Leslie” fast, slow, and brake
> Front panel and footswitch control of all functions
> MIDI control of all functions
> Single space 19" rack chassis
> Both chorus and vibrato modes
> Will phantom power all ROLLS MIDI foot controllers
> Speed may be controlled by controller #4
Using the ROLLS RP147
Connect the signal source to the input jacks on the rear. If a mono source is used use only
“RIGHT IN” and “RIGHT OUT”. The effect will come out both jacks but in “BYPASS” only the
inputs connected will pass through. The “INPUT LEVEL” may be used to match the bypass
signal or make the process signal greater or less. If too much signal is input the special
overdrive circuits offer a “tube” like distortion. The unit may be controlled three ways, front
panel buttons, remote foot switch, and MIDI controller.
If MIDI control is being used connect the controller to the MIDI IN jack on the rear
panel. If a ROLLS MIDI controller is used a power adapter will not be necessary as the
power will be through the cable (as long as the cable has all 5 wires connected). The
RP147 recognizes program change numbers 1 through 5 as follows.
Program change # (numbers starting at 1)
1 > Bypass
2 > Active (nothing changed)
3 > Active slow
4 > Active fast
5 > Active stop
The speed may be controlled by controller #4 on the same channel as the pro-
gram changes. The speed will vary with data #127 being equivalent to the fast speed and
data #0 as stop. If your controller doesn’t have that much range you can still achieve full
speed range by adjusting P2 on the circuit board to full CCW, this will give the maximum
range the controller can give but when it is being used with the other controls the fast speed
will be too fast. Also touching any button or sending a program change will take it out of the
“controller” mode and the RP147 will assume the new parameter, a new controller data #
will have to be sent to resume operation. Adjusting P2 is cause for deep meditation and
soul searching.
1
On the rear panel is a 3 pin header connector that is used for selecting the MIDI
channel, only channel 1, 9 or 16 may be selected. The unit must be off when changing the
channel, looking at the rear the pins are numbered 3 2 1. With no shorting clip the RP147 is
in “omni” mode, or all channels are recognized.
No pins shorted = all channels recognized
Pins 1 and 2 shorted = channel 9
Pins 3 and 2 shorted = channel 1
Pins 1, 2 and 3 shorted = channel 16
The ROLLS RP8 dual foot switch may be used to control the RP147 by connecting a stereo
cord between the two. This will allow fast/slow and active/bypass control. And it is theoreti-
cally possible to enter “BRAKE” if both are pressed exactly together.
The speeds are controlled internally by trim pots located on the motherboard. P2 controls
the fast speed and P3 the slow.
1
ROLLS CORPORATION
5968 S 350 W
MURRAY UT
84107
1
RP147.SCH
?
1992
Title
Size:
Document Number:
Date:
Rev:
Sheet
of
RP147 ROTORHORN
Rb
VB
VB
VB
VB
+5V
+5V
MIDI IN
+5V
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A8
A9
A10
A11
A12
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
AD0
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
F / S
BRAKE
BPASS
+5V
+5V
R IN
L IN
L OUT
R OUT
POWER
+12V
-12V
AC IN
PEDAL
BPASS
BPASS
BYPASS
+12V
+12V
+12V
VCC
+12V
+12V
+12V
+12V
-12V
-12V
-12V
+12V
+12V
-12V
-12V
+12V
-12V
+12V
-12V
+12V
+5V
+5V
+5V
+5V
-12V
-12V
+12V
+5V
+5V
+12V
-12V
VFAST
VSLOW
VSLOW
VFAST
VB
-12V
+12V
-12V
+12V
R4
10K
R11
1K
R30
100K
R31
10K
R34
10K
R46
100K
R49
100K
R68
1K
R69
1M
R70
47K
R73
1K
R74
10K
R75
10K
R77
1K
R78
1K
R80
10K
R81
10K
C22
1UF
C26
25PF
I
1
G
2
O
3
U14
7805
D0
3
D1
4
D2
7
D3
8
D4
13
D5
14
D6
17
D7
18
OC
1
G
11
Q0
2
Q1
5
Q2
6
Q3
9
Q4
12
Q5
15
Q6
16
Q7
19
VCC
20
GND
10
U16
74HC373
A0
10
A1
9
A2
8
A3
7
A4
6
A5
5
A6
4
A7
3
A8
25
A9
24
A10
21
A11
23
A12
2
CE
20
OE
22
PGM
27
VPP
1
O0
11
O1
12
O2
13
O3
15
O4
16
O5
17
O6
18
O7
19
VCC
28
GND
14
U17
27C64
D1
1N4001
D5
LDSG
D6
1N4148
R86
150
J1
PC 1/4
J2
PC 1/4
C2
10U
IN
3
VGG
4
GND
1
VDD
5
O1
7
O2
8
CLK1
2
CLK2
6
U18
MN3007
C9
47U
P2
1K TP
J5
PC 1/4
C24
1U
D7
1N4148
D8
1N4148
C19
.047
D25
LDRR
D14
1N4148
D15
1N4148
Q2
J113
C27
10U
P1
P100K
R72
1K
J4
PC 1/4
J3
PC 1/4
D3
1N4001
D4
1N4001
D2
1N4001
C23
1UF
C25
25PF
SW2
SW3
SW4
1
3
4
2
5
J6
DIN 5
R84
47
D22
1N4148
Q1
J113
R5
4.7K
D11
1N751A
R25
100K
R26
220K
R27
470K
R28
100K
R29
10K
D18
1N4148
D20
1N4148
P3
1K TP
R35
4.7K
R36
47K
R51
10K
R6
33K
R7
33K
R8
33K
C3
.01
C5
.039
C4
820PF
R56
22K
R57
22K
R58
22K
C16
.001
C18
120PF
C17
.0039
C31
10U
R79
4.7K
R63
10K
R13
10K
R43
22K
R24
22K
R9
1K
2
3
6
5
7
4
U3
CA3080
C34
120PF
1
H1A
2
H1B
3
H1C
C13
1U
C11
25PF
3
2
1
4
U7A
1458
6
5
7
8
U4B
1458
3
2
1
4
U4A
1458
2
3
1
4
U2A
4558
6
5
7
8
U8B
4558
2
3
1
4
U6A
1458
2
3
1
4
U11A
4558
6
5
7
8
U2B
4558
2
3
1
4
U1A
4558
6
5
7
8
U1B
4558
EA/VP
31
X1
19
X2
18
RESET
9
INT0
12
INT1
13
T0
14
T1
15
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
P0.0
39
P0.1
38
P0.2
37
P0.3
36
P0.4
35
P0.5
34
P0.6
33
P0.7
32
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
RD
17
WR
16
PSEN
29
ALE/P
30
TXD
11
RXD
10
VCC
40
VSS
20
U15
80C31
6
5
7
8
U7B
1458
R?
10K
R71
47K
R3
100K
2
3
1
4
U19A
4558
6
5
7
8
U19B
4558
6
5
7
8
U11B
4558
Q3
2N3906
D
9
Q
13
CLK
11
Q
12
R
10
S
8
VDD
14
VSS
0
U5B
4013
D
5
Q
1
CLK
3
Q
2
R
4
S
6
VDD
0
VSS
7
U5A
4013
6
5
7
8
U10B
4558
R67
10K
R48
100K
R64
10K
R22
10K
C33
120PF
D21
LDRR
C15
47UF
1
A
2
B
3
C
C1
1U
R1
100K
R2
100K
Q10
2N5088
R61
10K
C?
.01
C8
1UF
C7
1U
R18
22K
R53
10K
C10
.01
R83
1K
R82
1K
R21
100K
C35
.1
C37
120PF
R55
100K
R60
4.7K
R23
47K
C38
120PF
C42
1U
R21
100K
D17
1N4148
C36
.1
R53
100
Q9
2N4124
C31
10U
C41
1U
R19
22K
R45
220K
C14
.047
R47
100K
R41
1M
D23
1N4148
R44
47K
R42
47K
R62
470K
R17
100K
C32
1UF
Q4
2N4124
R37
1K
R38
10K
5
6
7
8
U6B
1458
R39
10K
R40
3.3K
C28
.0047
C30
.01
R12
47K
R87
10K
P4
50K
P5
50K
Q6
2N3906
Q7
2N3906
Q8
2N4124
Q5
2N4124
R10
47K
R65
10K
R66
10K
C29
.01
R15
18K
C?
.047
R14
47K
THD
8
DG
3
RIN
2
RC
1
GND
4
INV
5
R3
6
OUT
7
V+
0
U9A
NE570
THD
9
DG
14
RIN
15
RC
16
GND
0
INV
12
R3
11
OUT
10
V+
13
U9B
NE570
R16
4.7K
C44
.047
C45
.27
C40
.047
R85
470
Q11
2N3904
R50
470
R33
470
X1
12MHz
C76
.1
SW5
SW SPST
PL1
PLUG AC MALE
T1
MCI 407 5024
I
1
G
2
O
3
U12
7812
I
2
G
1
O
3
U13
7912
1
2
3
4
5
6
ISO1
4N35
Several versions of this unit were made
Several different opto isolators were used
and this schematic may not apply 100% to all units
(ROLLS RP8)
SCHEMATIC
