Tube Tech SSA 2B Stereo summing amplifier - Manual (Page 3)

Lydkraft ApS
Mose Allé 20, DK2610 Rødovre
Denmark
3
(081010)
ADJUSTMENT PROCEDURE:
CAUTION:
Before making any adjustment let the unit heat-up at least 10 min.
Always check the DC voltages at the power supply.
1) The DC voltage in TP201 shall be +280V (265-295V).
2) The DC voltage in TP202 shall be +240V (238-242V).
3) The DC voltage in TP203 shall be +15,0V (14,7-15,3V).
4) The DC voltage in TP204 shall be -15,0V (14,7-15,3V).
5) The DC voltage in TP205 (across C211) shall be +12,0V (11,5-12,5V)
6) The DC voltage in TP206 shall be +238V (236,5-239,5V)
ADJUSTMENT OF PSU:
1) The DC voltage in TP202 shall be +240V.
Adjust with P202.
ADJUSTMENT OF BASIC GAIN:
1) Set the “OUTPUT GAI N” on “0” .
2) Apply a signal of 1 kHz, 0,0 dBU to the input, either one mono or two stereo (one for
each channel).
3) Adj ust t he pr eset “ Gai n”P1 (P101) (on amp/psu PCB) to an output
reading of 0,0 dBU