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ModWright Instruments, Inc.
PH 9.0 Tube Phono Stage
Owner’s Manual
Manufactured by ModWright Instruments, Inc.
21919 399th St., Amboy, WA 98601
USA
www.modwright.com
Page 1: ...1 ModWright Instruments Inc PH 9 0 Tube Phono Stage Owner s Manual Manufactured by ModWright Instruments Inc 21919 399th St Amboy WA 98601 USA www modwright com ...
Page 2: ...R UNIT ON UNTIL LID IS ENTIRELY FASTENED VERY HIGH VOLTAGES ARE PRESENT INSIDE UNIT DURING OPERATION IT IS CRITICAL THAT PREAMP ENCLOSURE NOT BE OPEN WHEN UNIT IS POWERED ON FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH WHEN CHANGING TUBES POWER UNIT OFF AND DISCONNECT FROM ALL POWER SOURCES FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH ...
Page 3: ...ximum gain for the PH 9 0 ranges from 64dB MC to 52dB MM Gain may be adjusted by 0dB 6dB or 12dB for either MC or MM operation This allows for compatibility with different MM and MC cartridges of high low or medium gain Cartridge loading for MC resistance only is user selectable via front panel controls for six different resistance settings Cartridge loading for MM is 47K fixed resistance The PH 9...
Page 4: ...ocket and gently but firmly press the tubes down into socket until seated After tubes are installed replace lid and secure with four screws Only after this should the external Power Supply be connected to the PH 9 0 phono stage Do not connect the Power Supply to AC power until umbilical is connected to both Power Supply and PH 9 0 DO NOT POWER UNIT ON UNTIL LID IS ENTIRELY FASTENED VERY HIGH VOLTA...
Page 5: ...t the umbilical to the Power Supply and connect the other end of the umbilical to the PH 9 0 Phono stage The umbilical has Male Female 4 pin connectors It can only be connected in one direction Only after the umbilical is securely connected at both power supply and phono stage should AC power cord be connected Signal cables must be connected for input and outputs You may connect the turntable to p...
Page 6: ...s indicated on back of power supply 4 MM or MC signal cables and ground wire are connected between turntable and phono stage 5 RCA or XLR signal cables Balanced Option is installed are connected from main outs of PH 9 0 to preamp Flip the power toggle up on front face of unit to power up the PH 9 0 When first powered on a blue LED above the power switches will be lit The unit will remain in mute f...
Page 7: ... 12dB For example if MC were selected in the 0dB position max gain would be 66dB If this were too much then moving the toggle switch to the 6dB position would reduce MC gain to 60dB The same may be done for MM use where max gain is 52dB when Gain selector is in 0dB position If you are using a MC cartridge you may set the recommended Resistance loading for your cartridge This may also be changed wi...
Page 8: ...cy Response 20Hz 20Khz 2dB Weight PH 9 0 12 lbs PS150 17 lbs Dimensions PH 9 0 10 W x 10 D x 4 H Power Supply 7 W x 9 D x 3 H Basic Specifications 1 pair MM RCA inputs 1 pair MC RCA Inputs 1 pair RCA Main Outs 1 pair XLR Main Outs fully balanced if option installed Vacuum Tubes Two 6922 signal tubes may substitute ANY 6922 6DJ8 7308 compatible tubes Two 6C45 signal tubes ...
Page 9: ...tory authorized ModWright Instruments Dealer Warranty covers parts and labor for repairs due to equipment failure not related to customer abuse and or neglect Customer is responsible for shipping costs to and from ModWright Instruments or authorized service center Warranty is non transferable to second party ...
Page 10: ...cts please do not hesitate to contact us via phone e mail or conventional mail PH 360 247 6688 EMAIL modwright yahoo com ADDRESS ModWright Instruments Inc 21919 NE 399th St Amboy WA 98601 United States of America Thank you for purchasing a ModWright Instruments product Dan Wright President Owner ModWright Instruments Inc ...
