User’s manual model 286a dual channel tube mic preamp & di handmade in st. Louis, mo usa.
Introduction thank you for your purchase of the locomotive audio model 286a! This hand-built vacuum tube dual mic preamp and di is a product of so much time, research and development. Inspired by many beautiful pieces of equipment from the 50s and 60s, we were able to design a flexible circuit with ...
Legal notices ©2015 locomotive audio, llc manual revision 286a-3 all information provided in this manual is thought to be accurate and free of errors at the time of printing. Locomotive audio, llc shall not be liable for any errors or omissions in this manual. All information in this document is pro...
Warnings & safety before powering up your new locomotive audio unit for the first time, please understand the dangers of vacuum tube electrical equipment. The high voltages within the chassis and around the tubes can seriously injury or kill you. Before plugging your unit into the wall, please make ...
Main features • microphone and high impedance instrument inputs • one ef86 & one 12ay7 per channel • polarity reverse switch • 20db pad switch • 100 hz low cut filter switch • microphone load impedance switch • mic/di selection switch • +48v phantom power switch • 3-position vu meter switch: ch1 - o...
About the 286a the dual channel 286a offers a huge sonic palette for engineers and producers to explore. Its single-ended class a tube signal path is what makes this preamplifier so special. Inspired by the great vintage ampex 601 vacuum tube tape recorder, the 286a features four tubes; there is one...
Front panel the front panel of the 286a features two identical sets of channel controls. 1. Power switch: switches unit on. Illumination of the power lamp and vu meter will result. 2. +48 switch: supplies 48-volt phantom power to the xlr input of channel. Use only with condenser microphones that req...
Back panel 1. Ac power entry module: accepts standard iec power cord (included) for 115v or 230v ac mains supply. A fuse is included with each unit for the voltage/current expected at the location being shipped to. Only use a fuse with the same rating and voltage as marked on back of chassis. 2. Ac ...
Vu meter calibration the vu meters in our units have been pre-calibrated. When needle is de- flected to 0db on the vu meter, a signal voltage of +4dbu will be present on the output of the unit. Turning the small calibration screw on the rear of the vu meter will allow a qualified technician to adjus...
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