Manley MOVING COIL & MOVING MAGNET PHONOGRAPH PREAMPILFIER - Manual (Page 5)

FEATURES AND APPLICATIONS
1. STANDBY POWER SWITCHING
The front-panel power switch toggles the CHINOOK between a normal operating state and a near zero-power sleep
mode. No operating voltages are present when in sleep mode, except for some keep-alive control logic, energized
by a separate small mains transformer in the power supply.
2. MOVING MAGNET / MOVING COIL GAIN SWITCHING
The MM/MC switches are located inside the unit. (See Fig. 3 Page 8) By changing the internal DIP switch settings,
the gain may be changed from 45dB to 60dB. Typically the 45dB setting is for moving-magnet cartridges and the
60dB setting for moving-coil. Your CHINOOK comes factory set for 45dB gain .
Before changing the internal gain, remove the mains plug from the unit. If the CHINOOK has been recently used,
wait at least 15 minutes for the internal capacitors to discharge before removing the cover. Do not touch any parts
on the board with your hands. Use a small flat screwdriver to change the DIP switch settings. Each channel has a
pair of switches in parallel for redundancy of contact area and assurance of contact integrity. Each pair of DIP
switch settings must be set for the SAME setting, and of course, both channels must be set for the same GAIN
selection. So remember, all GAIN switches need to be set towards the REAR for 60dB of GAIN or all DIP switches
need to be set towards the front of the chassis for the 45dB GAIN setting.
Fig.1 - Rear Panel Layout
3. SELECTABLE CARTRIDGE LOAD IMPEDANCE AND CAPACITANCE
Your CHINOOK is equipped with a flexible set of cartridge loading options. It is shipped with the internal gain set to
45dB and 47k / 50pF loads. This is a good starting point for the majority of users. If you have a moving-coil
cartridge, follow the instructions for changing the gain in section 2.
See Fig. 2 Page 4 for 32 possible loading choices.
4. SETTING THE LOADING SWITCHES
Typical phono interconnect cables will exhibit self-capacitance on the order of about 20-30 pF per foot. If the
interconnect cable is 3 feet (~ 1 meter) in length, you may expect about 60-90 pF of input capacitance to be
present due to the interconnect cable alone.
See Below Fig.1; An example of the rear panel showing the location of the loading dip switches.
Chinook Owners Manual 3
MANLEY
LABORATORIES, INC.