Filter
Top Products
PAGE 15
LIVE OUT: To Power Amp The
Recto Pre
provides two output channels for feeding signal to either stereo power amplifiers, effects
processors (see EFFECTS LOOP - presented earlier in the Rear Panel section of this manual) or even the effects return or power-in
stages of self contained amplifiers. Thus the
Recto Pre
is a stereo
capable pre-amp with two identical signals that appear at the MAIN
OUTPUTS. For mono applications simply connect either of the MAIN
OUTPUT jacks to your power amp or processor. To use both MAIN
and RECORD OUTPUTS in a mono scheme simultaneously, con-
nect opposing outputs (one channels’ MAIN OUTPUT to your power
amp - the other channels’ RECORD to your console.
The MAIN OUTPUTS are fed signal from both individual channel MASTERS as well as the final OUTPUT Level Control located at the far
right on the Front Panel. As mentioned earlier, the channels are controlled simultaneously with the single OUTPUT control, as this poten-
tiometer is actually two syncronous pots in one. To control the output channels separately, they must be sent to two different power
sources and then controlled independently from there. In this type of set-up it may be necessary to lift the ground on one of the power
sources to prevent a ground loop. This application is most often seen when a pre-amp is used to feed two or more power amps on a large
stage where there is need for both back line and stagefront monitor cabinets.
TUBE BAY: The
Recto Pre
uses six 12AX7A type dual triode pre-amp tubes for its’ all-tube circuitry which are mounted horizontally and
recessed in an easily accessible tube bay. In the unlikely event that you need to replace a tube, you may do so by simply unplugging it from
its socket and plugging a new one in. Since the tube sock-
ets grab the pins on the tube rather firmly, it helps to gently
rock the tube back and forth while pulling outward on the
tube (see illustration below).
When installing the replacement, make sure that the pins
on the tube are not bent (you can straighten bent pins with a
pair of needle nose pliers) and line them up carefully before
inserting the tube.
REAR PANEL CONTROLS: (Continued)
RECORD
OUT
TO MIX
CONSOLE
LEFT
RIGHT
LIVE
OUT
TO
PWR
AMP
(ALT FX PATCH)
RETURN - L
RETURN - R
EXTERNAL SWITCHES
SEND
CH1 - CH2
SOLO
MODERN
EXT. TRIGGER
TO POWER AMP
10%
100%
FX MIX
NORMAL
HANDBUILT IN PETALUMA CALIFORNIA PATENTS PENDING FOR MUTE, RECORDING & SOLO FEATURES TUBES: SIX 12AX7
RECTO~PREAMP
ALL TUBE
RECORDING AMPLIFIER
117 V~
1 AMP
60 HZ.
POWER
LIFT
GROUND
MIN.
INPUT
M
E
S
A
MESA
12AX7
12AX7
M
ESA
MESA
1
2
A
X
7
12AX7
MESA
12AX7
GENTLY ROCK TUBE BACK AND FORTH WHILE PULLING IN AN OUTWARD DIRECTION CAREFULLY