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The total power consumption for the RECT-O 50 is 2.5Amps @ 120 Volts. Thus, a 15 Amp circuit (which is what most house
circuitry is wired with) is adequate. Make sure the Euro style A.C. power cord is firmly seated in the power receptacle before powering
up the unit. Always connect the A.C. cord to a 3 terminal grounded socket. If none are available, connect
the A.C. power cord to a ground lift adaptor and then connect to a 2 terminal outlet. This may also be
necessary from time to time for noise problems.
This style of power cord will make tear-downs and cable routing a lot easier and save you time as well. If
you should ever need a replacement, just call and we’ll be happy to send you another one for a nominal
charge or visit your nearest Mesa/Boogie Pro Center.
This is the A.C.’s (Alternating Current) main fuse and provides protection from outside A .C. fluctuations as well as power tube failure
damage. Should the FUSE blow, replace it with the same rating in a Slo-Blo type package. The domestic U.S. version requires a 2.5
amp Slo-Blo fuse. A power tube short or failure is often the cause of a blown fuse...Follow the cold start
procedure mentioned in the ON/STANDBY switch section and watch the power tubes as you flip the
STANDBY switch to the ON position.
If a power tube is going bad or is arcing you will see it! Flip the STANDBY switch to Standby immediately
and replace the faulty power tube and the fuse if necessary. If you see nothing abnormal as you lift the
STANDBY switch it is possible that a power tube shorted temporarily and blew the FUSE. If this is the
case it may work again normally. To be extra safe, you might want to replace just the adjacent tube or all
power tubes in the “shotgun” troubleshooting tradition and save the replaced set as spares. Spare
fuses are a must for the fabled cord bag along with your spare tubes. Always carry both for they could
be worth their weight in gold someday.
This 1/4" jack provides a signal derived from the speaker jack. Perfect for using the RECT-O 50 as a master pre-amp, or additional
power amps may be connected for more power when needed. Some players use this to derive an FX Send Signal and go to other
amps for their wet sound.
NOTE: Once a signal is taken from the SLAVE, it can not be inserted back into the FX Loop
Return jack or a feedback loop will occur. Much like holding a microphone into the PA system’s
cabinets...a loud high pitched squeal will occur.
PAGE 8
REAR PANEL:
A.C. RECEPTACLE:
FUSE:
RHYTHM
LEAD
SET TO RHYTHM
WHEN USING
FOOTSWITCH
WARNING
:
To reduce risk of fire or
electric shock, replace fuse with
same type and rating only. Do not
expose this unit to rain or moisture.
CAUTION
:
To reduce risk of fire or electric
shock, do not remove cover. No user-
serviceable parts inside. Refer
servicing to qualified personnel.
PATENTED 4,211,893 AND OTHERS PENDING
8 OHM
4 OHM
4 OHM
SPEAKERS
10%
1
0
0
%
FX MIX
RETURN
SEND
EFFECTS LOOP
SLAVE
OUT
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis.
F
U
S
E
F
U
S
E
POWER FUSE
2.5 A
SLO
BLO
120 V~
50-60 Hz
2.5 A
SOLO HEAD 50 ALL-TUBE AMPLIFIER
HANDBUILT IN PETALUMA, CALIFORNIA
REAR VIEW - HEAD VERSION
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis.
POWER FUSE
2.5 A
SLO
BLO
120 V~
50-60 Hz
2.5 A
F
U
S
E
F
U
S
E
HEAD VERSION
F
U
S
E
F
U
S
E
POWER FUSE
2.5 A
SLO
BLO
120 V~
50-60 Hz
2.5 A
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis.
HEAD VERSION
SLAVE OUT :
SLAVE
OUT
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis.
F
U
S
E
F
U
S
E
POWER FUSE
2.5 A
SLO
BLO
120 V~
50-60 Hz
2.5 A
HEAD VERSION