Abstract: A solid-state semiconductor guitar amplifier system/method mimicking the audio performance characteristics of conventional vacuum tube guitar amplifiers is disclosed. The disclosed system/method incorporates solid-state semiconductor circuitry implementing an input audio preamplifier (IAP) having asymmetric gain control (AGC) that feeds wave shape transformer (WST) circuitry implementing a piecewise/diode breakpoint (PDB) transform that emulates a conventional vacuum tube voltage-current transfer (VIT) characteristic. A breakpoint threshold controller (BTC) determines the offset associated with application of the PDB operation to the audio signal.

Abstract: A solid-state semiconductor guitar amplifier system/method mimicking the audio performance characteristics of conventional vacuum tube guitar amplifiers is disclosed. The disclosed system/method incorporates solid-state semiconductor circuitry implementing an input audio preamplifier (IAP) having asymmetric gain control (AGC) that feeds wave shape transformer (WST) circuitry implementing a piecewise/diode breakpoint (PDB) transform that emulates a conventional vacuum tube voltage-current transfer (VIT) characteristic. A breakpoint threshold controller (BTC) determines the offset associated with application of the PDB operation to the audio signal.

Abstract: In one aspect, the present invention relates to a system for abrasion of optical fibers. The system includes an adjustment member, a platform disposed on the adjustment member, and a focus block disposed on the platform. A laser is disposed above, and is in optical alignment with, the focus block. The laser abrades an optical fiber positioned on the focus block.