LACHAPELL AUDIO
Model 992 Vacuum Tube Preamplifier for Microphones and
Instruments
Operating
Manual
Страница 1: ...LACHAPELL AUDIO Model 992 Vacuum Tube Preamplifier for Microphones and Instruments Operating Manual ...
Страница 2: ...ng how to operate this devise safely and properly UNPACKING Inspect thoroughly Although we take extreme care at final assembly and packing things can happen during transit It is very important that you contact LaChapell Audio if there is anything broken or damaged upon receipt of package Shipping is always insured and we will do our absolute best to satisfy any legitimate claim as long as it is ma...
Страница 3: ...ube socket has a designation V1 to V4 silk screened onto the P C board of each channel V1 2 are the input tubes 12AX7 ECC83 or 6072 V3 4 are the output tubes 12AU7 ECC82 6189 The 5814 is also an acceptable 12AU7 replacement We recommend that you send the unit back for tube replacement as there will likely be the need for grid balancing WARNING Warrantee may be voided if tubes other than those list...
Страница 4: ... indicator located just above the rear power rocker switch As stated above use only a 3 prong detachable AC power cord See the SERVICE REPAIR section for replacing the fuse s International Power Settings At this time power settings other than 115v are only available as a factory modification DO NOT attempt to use the red voltage fuse sub module for voltage adjustments If this modification has been...
Страница 5: ...is assumed the input gain stage is favored more than the output stage It is not uncommon for the input pot to be in its fully clockwise position before additional output gain is applied Use this wisely as too much input gain especially with the EG may result in distortion Channel Specific Toggles METER This is a Sifam type AL29WF VU meter and monitors output signal strength The VU meter is buffere...
Страница 6: ...ge all defective parts in the Products which are returned for inspection to said center within the warranty period provided such inspection discloses that the defects are as specified above and provided further that the Products has not been altered or repaired other than with authorization from LaChapell Audio and by its approved procedures not been subjected to misuse improper maintenance neglig...
