CHINOOK OWNERS MANUAL MOVING COIL & MOVING MAGNET PHONOGRAPH PREAMPILFIER Issue 1. Rev 1.0 January 2012 Designed & Manufactured in the USA by Manley Laboratories, Inc. 13880 Magnolia Avenue Chino, California 91710, USA T: +1 (909) 627 4256 F: +1 (909) 627 4256 emanley@manleylabs.com www.manley.com MANLEY LABORATORIES, INC.
CONTENTS SECTION PAGE CONTENTS i INTRODUCTION 1 UNPACKING 1 INSTALLATION PRECAUTIONS 2 FEATURES AND APPLICATIONS 3-5 1. Standby & Power Switching 3 2. MM & MC Gain Selection 3 3. Selectable Cartridge Loading 4 4. Load Switching 5 5. High Performance Front End 5 6. Accurate “4-corner” RIAA Equalization 5 OPERATIONAL NOTES 6-7 INTERNAL VIEW 8 TROUBLESHOOTING 9 MAINS VOLTAGE SELECTION 10 SPECIFICATIONS 11 MANLEY LABORATORIES, INC.
INTRODUCTION THANK YOU!... ...for choosing The MANLEY CHINOOK phonograph preamplifier. Please read this manual carefully as it contains information which is essential to the proper operation and maximum enjoyment of this fabulous instrument. With the current resurgence of vinyl playback, MANLEY LABS could see the need for a new design. By utilizing the same advanced technology as used in our critically-acclaimed flagship STEELHEAD preamplifier, a new product was developed: the CHINOOK.
INSTALLATION PRECAUTIONS a) Avoid locating the preamp where it will be exposed to direct sunlight, excessive humidity, dust or moisture. Extreme environments may temporarily or permanently degrade preamp performance. b) Keep the preamp housing away from sources of strong magnetic field radiation, such as large video display CRTs, large power lines or power/audio transformers in nearby equipment.
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.
Fig 2. MANLEY LABORATORIES, INC.
LOADING, continued.... If the cartridge manufacturer specifies a load capacitance of 150 pF then it is best to subtract the cable's portion, i.e. 90 pF. This yields a balance of 60 pF. Thus, the audition should start with the termination capacitance switches set to 50 pF. Each cartridge manufacturer's product will work best in a laboratory sense when terminated (loaded) with a certain amount of resistance and capacitance.
OPERATIONAL NOTES PREPARATION FOR INSTALLATION Budget a suitable space in which to place the preamplifier, and associated interconnect cable. This space should be free of strong external magnetic and RF fields, and reasonably removed from strong loudspeakergenerated acoustical fields. This space should also be free of excessive heat or dust and large enough to permit easy flow of cool air to the top, bottom and sides of the preamp.
Let the preamp tube(s) cool down, if necessary, before handling. Tube heater filaments are somewhat more susceptible to damage when warm or hot. Each tube should require only moderate force for removal and replacement. Gently rock the tube back and forth a bit during removal or replacement. Avoid bending the circuit board.
Mains fuse Keep alive fuse RIGHT 6922 Tubes MC RIGHT MM MC LEFT Fig.2 Internal View MM MANLEY LEFT 6922 Tubes LABORATORIES, INC.
TROUBLESHOOTING The CHINOOK's system architecture is designed with a variety of features so as to allow flexibility in accommodating as many cartridges and as much downstream gear as possible. Access to these capabilities rest on the assumption that all CHINOOK systems are functioning properly. If trouble is encountered, please review the following short list of symptoms and corrective remedies before contacting your dealer or Manley Laboratories service.
MAINS CONNECTIONS Your CHINOOK has been factory set to the correct mains voltage for your country. The voltage setting is marked on the serial badge, located on the rear panel. Check that this complies with your local supply. Export units for certain markets have a molded mains plug fitted to comply with local requirements.
SPECIFICATIONS •Vacuum Tube Complement: 6922 x 2 (gain stage) plus 6922 x2 (output stage). Any 6DJ8, 7308, ECC88 types may be used. •Unbalanced Input and Output connections via Manley Teflon® & Gold plated RCA jacks •Automatic Mute Timer: On initial power up output jacks are muted for approximately 45 seconds. •Automatic mute circuit allows tubes to warm up and circuitry to settle. •At power down, output jacks are immediately muted.
