Instruction Manual

3
PORTICO 542: BLOCK DIAGRAM
PORTICO 542: FRONT PANEL
INPUT TRANSFORMER
INPUT STAGE
OUTPUT STAGE
OUTPUT TRANSFORMER
OUTPUT
INPUT
-
SATURATION TRANSFORMER
RECOVERY
DE-EMPHASIS
DRIVE
PRE-EMPHASIS / SOFT-CLIP
-
-
-
BLEND AMP
SAT ENGAGE
SAT ENGAGE
BLEND
IPS
15 IPS
30 IPS
SILK
RED
BLUE
TEXTURE
+/-12dB TRIM
Drive Meter
Level Meter
blend control. In addition to the tape circuit, the 542 also has the variable Silk /
Texture found in the Portico II series of modules, which allows the engineer to ne
tune the harmonic ratio and tonality on the output transformer.