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ORIENTATION OF PREAMP VALVES
The preamp valves fitted in production are SOVTEK 12AX7's. These were used
because they were found to have low microphony, good reliability and produce a
wonderfully rich and musical harmonic structure particularly when overdriven.
Nine 12AX7's and one EL84 are fitted to the Trident amplifiers and are used as
follows:-
Combo Version
Looking at the unit from behind with the rear panel removed, the second row of five,
with the EL84 in the far left position, and the right hand two in the first row are for
the three preamp channels. The other valves in the first row are for, from left to right,
phase splitter, effects loop and reverb.
Head Version
Again looking at the unit from behind with the rear panel removed, the second row of
five, with the EL84 in the far right position, and the left hand two in the first row are
for the three preamp channels.The other valves in the first row are for, from right to
left, phase splitter, effects loop and, as the head version does not have reverb, the
middle valve is unused and is provided as a spare.
TECHNICAL SPECIFICATIONS
PREAMP
INPUT
EFFECTS SEND
EFFECT RETURN
TONE CONTROLS
REVERB
CIRCUIT TOPOLOGY
POWER AMP
POWER RATING
1MΩ IMPEDANCE
IMPEDANCE 100KΩ
NOMINAL SIGNAL LEVEL 0dBv
250Ω IMPEDANCE
NOMINAL SIGNAL LEVEL 0dBv
PASSIVE
3 SPRING TRAY
MAIN SIGNAL PATH 100% VALVE
PENTODE MODE ≥100 WATTS
TRIODE MODE
(EL34 power valves)
40 ~50 WATTS
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