StewMac LIGHTCYCLE PHASOR II Manuel
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BASED ON THE MU-TRON PHASOR II
FIRST TIME BUILDING A PEDAL? Kick back and watch our 4-part
series where we show you the basics of pedal building. Even if
you’re a complete beginner don’t worry! We go over everything
from unboxing, to choosing the right soldering iron, to making
every connection. We also give tips on painting your pedal.
Visit: stewmac.com/pedal-build
The Lightcycle is a phase shifter based on the rare Mu-Tron Phasor II, the stripped-down second-
generation version of the original Bi-Phase pedal.
The phase pedal duplicates the original signal and manipulates it by shifting the phase of the copied
signal. These types of eects originated in the studio with the birth of automated double tracking in the
60’s. Engineers would run two tape machines at varying speeds to achieve a double tracking eect that
produced a wide range of never before heard eects.
The Phasor II had a more simple and stage friendly control layout than the Bi-Phase that was easier to
manage in live performance situations. As of this writing, the Mu-Tron Phasor II fetches no less than
$700 on the used market.
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Soldering Iron #0502
Solder Wick #0504
Solder #0505
Wire Cutter #1607
Long-Nose Pliers #1610
Fine-Gauge Wire
Stripper #1606
Guitar Tech
Wrench Set #3691
or nut drivers/sockets
PC Board Holder #0500
TOOLS AND SUPPLIES
REQUIRED OR RECOMMENDED
Not pictured: #1Phillips screwdriver,
supplies to paint your pedal, clear
silicone adhesive, spray nish.
Power: Model 12253 requires a
standard 9V DC center-negative
power supply (not included) and
consumes less than 100mA.
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Magnifying glass or
OptiVISOR #1685
Multimeter PM16B #3607
Our Pedal BuildingTool Set #2318 is the
perfect companion for new pedal builders
who do not already have a lot of tools and supplies.
TOOLS AND SUPPLIES
HELPFUL
Soldering Aids #0521
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We know you are excited to get started building.
That said, one of the keys to a successful build, is
taking the time to get to know all of your parts. Sort all of your pedal’s
parts and check o according to the parts lists that follow. If you are not
familiar with what they do, the next section will give you a little primer.
3.9K resistor (2) #100700
2.2K resistor (2) #7376
39K resistor (1) #100704
8.2K resistor (3) #100702
560Ω resistor (2) #7356
18K resistor (1) #7396
Green Blue Black Black Brown
Gray Red Black Brown Brown
Orange White Black Red Brown
Red Red Black Brown Brown
Orange White Black Brown Brown
Brown Gray Black Red Brown
120Ω resistor (1) #101122
Brown Red Black Black Brown 4.7K resistor (16) #7359
10K resistor (3) #7362
Brown Black Black Red Brown
Yellow Purple Black Brown Brown
330Ω resistor (1) #7375
Orange Orange Black Black Brown
PARTS LIST
Note: While electrical
properties remain the same,
the appearance of parts may vary
based on availability. If you are ever
unsure, please contact us via the
information on the back of this manual.
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1N5817 rectier diode (1)
#7522
68K resistor (3) #7380
220K resistor (7) #7381
47K resistor (2) #7369
390K resistor (2) #7419
1N4148 rectier diode (2)
#7470
Orange White Black Orange Brown
Yellow Purple Black Red Brown
Red Red Black Orange Brown
Blue Gray Black Red Brown
820pF capacitor (1)
#100722
47pF capacitor (1)
#100720
1µF capacitor (1)
#7314
10µF capacitor (3)
#7310
10uF
220µF capacitor (1)
#101930
220uF
1uF
PARTS LIST CONT
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1N5817 rectier diode (1)
#7522
68K resistor (3) #7380
220K resistor (7) #7381
47K resistor (2) #7369
390K resistor (2) #7419
1N4148 rectier diode (2)
#7470
Orange Gray Black Orange Brown
Brown Purple Black Red Brown
Red Red Black Orange Brown
Blue Gray Black Red Brown
1µF capacitor (1)
#7314
1uF
10µF capacitor (3)
#7310
100uF
220µF capacitor (1)
#100727
220uF
820pF capacitor (1)
#100722
47pF capacitor (1)
#100720
KE - 10720 LDR (6)
#100778
2N4401 transistor (1)
#100735
470nF capacitor (2)
#101932
1nF capacitor (1)
#101931
3.3nF capacitor (1)
#7303
3n3K
MMK
BF6
63-
100nF capacitor (2)
#7304
.1J63
6.8nF capacitor (6)
#100723
682J100
1K trim pot (1)
#100737
10K trim pot (1)
#7570
KE - 10720 LDR (6)
#100778
WMA
0,47
100-
470nK
WIMA
1000/100-
2N4401 transistor (1)
#100735
2N4
401
102 1H
103 1M
1/4" mono jack (2)
#4652
470nF capacitor (2)
#101932
1nF capacitor (1)
#101931
3.3nF capacitor (1)
#7303
3n3K
MMK
BF6
63-
100nF capacitor (2)
#7304
.1J63
6.8nF capacitor (6)
#100723
682J100
1K trim pot (1)
#100737
10K trim pot (1)
#7570
KE - 10720 LDR (6)
#100778
WMA
0,47
100-
470nK
WIMA
1000/100-
2N4401 transistor (1)
#100735
2N4
401
102 1H
103 1M
1/4" mono jack (2)
#4652
PARTS LIST CONT
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3PDT latching footswitch (1)
#1611
Adhesive foam tape squares (4)
#7560
2.1mm DC power connector (1)
#7468
White LED (1)
#7422
Yellow LED (1)
#7423
5mm LED mounting bezel (1)
#7432
B10K linear taper pot (1)
#7532
A10K audio taper pot (1)
#101646
A25K audio taper pot (1)
#102230
TL072
TC1044 SCPA Charge pump (1)
#100732
Integrated circuit socket (7)
#7484
TL072 1C op-amp (6)
#7444
TC1044
PARTS LIST CONT
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StickerSheet (1)
Circuit Board [PCB] (1)
Breakout Board (1)
Pre-drilled enclosure (1)
IN GND SW OUT
24" of lead wire (1)
#5960
Control knobs (3)
#7501
PARTS LIST CONT
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1. To minimize redoing steps, make
sure you have a solid idea of the
look and feel you’re going for.
2. Lightly sand housing with a
P240 grit sandpaper and wipe
clean any debris.
3. Cover the holes from the
inside with masking tape.
4. On a large piece of cardboard,
elevate the housing top and
bottom on a couple of small blocks
of wood.
5. With long, slow strokes, spray
one light coat of primer or primer/
paint on top and bottom. Allow
45 minutes of drying time between
next two to three coats.
6. If you’re using primer followed
by paint method, paint 3 coats
with 45 minutes between coats.
7. Now, add your Lightcycle
sticker and any other
desired decoration (paint
pens, acrylic paint, Sharpie
etc.). Allow drying time.
8. Add 3 coats of clear coat glaze
with 45 minutes between
coats. Wait at least 2 hours
before adding parts.
Give your pedal a custom paint job by painting and adding the stickers provided in this kit
(or custom decals that you can create on your own). Doing this pre-build is not only fun,
but it’s much easier than disassembling the pedal to paint it once you put it together. Don’t
forget to order quality primer and lacquers from stewmac.com.
PAINTING
YOUR PEDAL
HOUSING
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