Fuse; Effects Loop - Mesa/Boogie ELECTRA DYNE Owner's Manual

reAr PANeL: C
Electra Dyne 45/90 Combo

FUSE

FUSE
~
100/120
4 A
50/60 Hz SLO
4 A BLO
FUSE:
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 4 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
to the ON position. If a power tube is going bad or is arcing you will see it! Flip the STANDBY switch to Standby
FUSE
immediately and replace the faulty power tube and the FUSE if necessary.
FUSE
~
100/120 4 A
If you see nothing abnormal as you switch the STANDBY on, it is possible that a power tube shorted temporarily and
50/60 Hz
SLO
4 A BLO
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.

EFFECTS LOOP:

The Electra Dyne incorporates an internal EFFECTS LOOP to handle the interfacing of outboard process-
ing. This circuit is a patch point between the preamp and the power section and it is wired in series with the dry (unaffected) signal.
Since this loop is a series-type loop (as opposed to parallel - where the loop signal runs alongside the dry signal)
it is important that you use good quality processors "in the middle" of your amp. While the loop is compatible with
A L L -T U B E A M P L I F IE R
most processor Input/Output impedance demands, there can be a lot of room for sonic compromise in some of the
ON
less expensive units. Remember that every part in your signal path is a tone part.
ON
BYPASS
SEND RETURN REVERB
NOTE: Always use good quality shielded cable of the shortest possible length when patching your effects. One foot
lengths are preferable - with lengths of more than 3 feet (each cable) starting to roll off top end and reduce upper
midrange punch and top end clarity.
To use the EFFECTS LOOP:
1) Connect the SEND jack to your processor's Input
2) Connect the RETURN jack to your processor's Output
3) Adjust the processor's Input/Output Level attenuator to achieve unity gain while plugging the RETURN cable in and out making
fine adjustments at the processor until you here no level difference.
NOTE: The EFFECTS LOOP is optimized for professional quality rack mount processors. Most pedal type effects work better in the
"front-end" between your instrument and the INPUT. You will experience some tonal changes because of the additional cable and
the fact that your instrument will no longer be going straight into the grid of the first tube. It's up to you to decide if the trade off is
acceptable.
& F
ONTrOLS eATUreS
LOOP NOTE:
LOOP IS
HARD BYPASSED
WHEN NOT IN USE
SEND RETURN
LOOP NOTE:
LOOP IS
HARD BYPASSED
WHEN NOT IN USE
SEND RETURN
EL-34 EL-34
HI
LO
6L6 RED=EL 34
MODE
FT. SW. BIAS SELECT
DEFEAT
ALL - T UBE A MPLI F I ER
ON HI
ON
LO
BYPASS
MODE
REVERB FT. SW.
DEFEAT
ALL - T UBE A MPLI F I ER
ON HI
ON
BYPASS LO
MODE
REVERB FT. SW.
DEFEAT
8 OHM
4 OHM
SPEAKERS SLAVE LEVEL
PAGE 17
EL-34 EL-34 8 OHM
6L6 RED=EL 34 4 OHM
BIAS SELECT SPEAKERS
EL-34 EL-34 8 OHM
6L6 RED=EL 34 4 OHM
BIAS SELECT SPEAKERS
CLEAN LEVEL
TRIM BYPASS
GAIN TRIM
CLEAN HI/LO
NORMAL
CLEAN LEVEL
TRIM BYPASS
GAIN TRIM
SLAVE LEVEL
CLEAN HI/LO
NORMAL
CLEAN LEVEL
TRIM BYPASS
GAIN TRIM
SLAVE LEVEL
CLEAN HI/LO
NORMAL