Mesa/Boogie II - Manual (Page 16)

PAGE 12
REAR PANEL: Controls & Features
FUSE:
This is the A.C.’s (Alternating Current) main fuse and provides protection from outside A.C. fl uctuations 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 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 fl ip
the STANDBY 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 switch the STANDBY on, 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 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.
FX LOOP: Series
The Lone Star Special handles outboard processing by providing an on-board patch point between
the preamp and power section. This loop is wired such that the dry signal is in series with the effected (wet) signal. The circuit also
incorporates a
SEND LEVEL control allowing you to fi ne tune the output of the preamp circuit to match the input sensitivity of your
processor (or fi rst processor in a rack system). The EFFECTS LOOP
circuitry can be completely removed from the signal path with the
HARD BYPASS/LOOP IN mini toggle. This removes all associated
loop circuitry and two tubes from the chain and ensures the purest
signal path and maximum sonic performance when outboard process-
ing is not being used. The
SEND and RETURN jacks incorporate
switching elements so that you may use the LOOP IN selection and
activate the Front Panel OUTPUT and SOLO controls with nothing
connected to the Loop.
NOTE: The Front Panel OUTPUT and SOLO controls are both part of the Loop and therefore active only when the Effects Loop
is engaged. They are both part of the Return stage and will remain inactive as long as the loop bypass mini toggle is set to
HARD
BYPASS.
To connect your outboard processor(s) to the Effects Loop;
1.) Connect the SEND jack on the Lone Star Special Rear Panel to your processor’s INPUT using a high quality shielded cable of
the shortest possible length.
2.) Connect the RETURN jack of the Lone Star Special to your processor’s OUTPUT also using a high quality shielded cable of the
shortest possible length.
3.) Adjust the SEND LEVEL control on the Rear Panel of the Lone Star Special to achieve an adequate match on the INPUT level
indicator of your processor. Adjust the processor Output level stage (hopefully your processor has an OUTPUT LEVEL control) to
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis
SLAVE POWER FUSE
2 A
SLO
BLO 120 V~
60 Hz
2 A
WER FUSE
FUSE
FUSE
First set sound with
LOOP bypassed. Then
set SEND & OUTPUT
to 50% for unity gain.
With LOOP IN, adjust
SEND to match FX.
Use OUTPUT for
RETURN level and
live volume control.
SEND RETURN NORMAL
MIN
SEND LEVEL
LOOP
IN
HARD BYPASS
OOGIE
B M
ESA LONE STAR
CH 2 REVERB CH 1
REVERB
BRIGHT
REV WARM
ALL - TUBE
AMPLIFIER
CHANNEL SOLO
EXT
SW
SPEAKERS
OPTIONAL
FOR 35 WATTS
MAIN OUT
FOR 30-15-5 WATTS TUBES: see owner's
manual 1 x 5Y3
ONLY 4 x EL-84
FAN ON
FAN OFF
HAND BUILT IN PETALUMA CA.
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis
POWER FUSE
2 A
SLO
BLO 120 V~
60 Hz
2 A
POWER FUSE
FUSE
FUSE
NORMAL
MIN
SEND LEVEL
First set sound with
LOOP bypassed. Then
set SEND & OUTPUT
to 50% for unity gain.
With LOOP IN, adjust
SEND to match FX.
Use OUTPUT for
RETURN level and
live volume control.
SEND RETURN LOOP
IN
HARD BYPASS
M
LONE STAR
TUBES: see owner's
manual
1 x 5Y3
ONLY 4 x EL-84