PAGE 16
The two different power selections of both the Dual and Triple Rectifier Heads are
equally important when looking for a particular sound. “SPONGY” works like a built in Variac, reducing all the internal voltages for a
true vintage feeling and that extraordinary “brown sound.” Power is reduced somewhat too, making it easier to achieve
an overdriven power sound, especially when the RECTIFIER SELECT switch is in the VACUUM TUBE position.
Using either Rectifier Head in this power setting will also extend tube life and overall reliability, while still producing
enough to work many of your gigs...and all of your recording needs!
With either the Dual or Triple Rectifier’s POWER SELECT switch in the BOLD position, maximum power,
clean headroom and volume are obtained.
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 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 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 tempo-
rarily 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.
SEND LEVEL
BIAS
SELECT
DIODE
CH 1EL-346L6 CH 2 CH 3
TUBE TRACKING
RECTIFIER
SELECT
MAIN
POWER
PATENTED 4,211,893; 5,091,700; 5,168,438; 6,621,907; 6,724,897; 7,193,458; 7,602,927
LOOP
ON
CH 1
CH 2
CH 3
FTSW
100 WATT HEAD
DUAL RECTIFIER
BEST TO USE TUBE TRACKING WITH EL-34s
TUNER OUT
120 V~
60 Hz
4A
4 A
SLO
BLO
SPONGY BOLD
SEND LEVEL
BIAS
SELECT
DIODE
CH 1EL-346L6 CH 2 CH 3
TUBE TRACKING
RECTIFIER
SELECT
MAIN
POWER
PATENTED 4,211,893; 5,091,700; 5,168,438; 6,621,907; 6,724,897; 7,193,458; 7,602,927
LOOP
ON
CH 1
CH 2
CH 3
FTSW
100 WATT HEAD
DUAL RECTIFIER
BEST TO USE TUBE TRACKING WITH EL-34s
TUNER OUT
120 V~
60 Hz
4A
4 A
SLO
BLO
SPONGY BOLD
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