8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and solving problems in musical equipment circuits. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH187A Electronic Musical Instruments Evidence shall show an understanding of electronic musical instruments, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. Vacuum tubes encompassing: history construction principles of thermionic emission advantages and disadvantages compared with solid state devices applications T2 Vacuum diodes encompassing: schematic symbol terminals operation and typical voltages rectifier circuits typical devices and part numbers T3 Triodes, tetrodes, and pentodes encompassing: schematic symbols terminals operation and typical voltages bias requirements AC parameters T4 Small signal valve amplifier stages encompassing: typical devices and part numbers typical configurations quiescent conditions AC conditions: gain, input impedance, bandwidth T5 Valve power amplifier stages encompassing: typical devices and part numbers typical push-pull configurations output transformer reflected impedance parallel output arrangements quiescent conditions AC conditions output power T6 Complete valve amplifiers encompassing: preamp stages coupling methods gain and master volume controls clean and “dirty” channels channel mixing valve tone controls spring reverb systems tremolo circuits effect sends foot switches differential amplifier phase splitter push-pull output configurations output transformer output impedance selection speaker connections local and global feedback arrangements T7 Valve amplifier troubleshooting and servicing encompassing: safety considerations: high voltages, heat and glass testing procedures and importance of testing with a load troubleshooting techniques typical faults locating and replacing faulty components T8 Electronic musical instruments encompassing: Electric guitar and bass wiring systems Active pickups Effects pedals and racks - principles of operation and basic circuits Electric keyboards, basic operation and circuits Troubleshooting and repairing musician instruments T9 Advance electronic measuring instruments encompassing: Test/measuring devices and their application - examples are frequency counters, and synthesisers, spectrum analysers, noise and distortion meters and RF communications service monitor. T10 Connection of test/measuring devices into a circuit encompassing: safety procedures loading and matching storage and delay circuit arrangement of test/measuring devices T11 Taking and interpreting readings T12 Notion of decibels including dBm, dBr, dBu, dBo |