Practical electronics engineer with 20+ years of experience offering professional services in hardware design, repair, and consulting. Specializing in tube (valve) amplifier design, building, and repair for musicians — guitar amps, preamps, and custom audio equipment. Additional expertise includes: electronic circuit troubleshooting and diagnostics, PCB-level repair (SMD and through-hole), power supply assembly and repair (up to 30-50A high-current), schematic design and review, vintage audio equipment restoration, and lab measurement setup integration. Former development engineer in RF/microwave defense sector. Currently supporting multiple research labs at Technion (Israel Institute of Technology). Available for remote consulting, schematic review, and on-site repair in Israel.