SVPCL Bass Preamp
Changing the Tubes:
Tube wear is in direct proportion to how often and how hard you play. Preamp tubes aren’t worked as hard as power tubes and typically last longer. When a preamp tube wears out, the preamp may squeal, get noisy, lose gain and sensitiv- ity, or just quit working. A service center can determine which tube(s) may need replacing. To get to the tubes in the SVPCL, the top must be removed. This should be left to a qualified service person.
System Block Diagram:
TUNER
OUTPUT
|
| TRANSFORMER |
|
| BALANCED LINE |
|
| OUTPUT |
| PRE |
|
| POST | MUTE |
PEAK |
| |
| GND | |
|
| LIFT |
PAD
INPUT
GAIN
MUTE
MASTER
PREAMP
OUTPUT
BUFFER
|
| PREAMP |
ULTRA | BASS TREBLE MID | OUTPUT |
ULTRA LOW HIGH |
|
|
|
| MID FREQ. |
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