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Ultra-LD Mk.4 Amplifier PCB [01107151 RevC] PCB for the Ultra-LD Mk.4 200W Power Amplifier. Double-sided PCB with plated through holes, solder mask and silkscreen overlay. 135 x 93mm. Cat No SC3122. Price: AUD $15.00 1  Add to trolley In stock: yes (17 available). Estimated dispatch time: 1-3 days Related to: Project: Ultra-LD Mk.4 200W RMS Power Amplifier: Preview (July 2015 [print issue] [online issue]) Project: Ultra-LD Mk.4 200W RMS Power Amplifier, Pt.1 (August 2015 [print issue] [online issue]) Project: Ultra-LD Mk.4 200W RMS Power Amplifier, Pt.2 (September 2015 [print issue] [online issue]) Project: Ultra-LD Mk.4 Power Amplifier, Pt.3: 110W Version (October 2015 [print issue] [online issue]) Project: Active Subwoofer, Part 2 (February 2023 [print issue] [online issue]) Other items relevant to these projects: High-End Active Monitor Speakers with Subwoofer: Active Monitor Speakers power supply PCB [01112221] ($10.00) Add to trolley Active Monitor Speakers cutting and assembly diagrams (Free) Add to trolley Ultra-LD Mk.4 200W RMS Power Amplifier: Ultra-LD Mk3/Mk4 Amplifier Power Supply PCB [01109111] ($15.00) Add to trolley Ultra-LD Mk.4 Amplifier prototype PCB [01107151 RevB] ($2.50) Add to trolley 2 x HN3A51F + 1 x IMX8-7-F + 2 x BC846C transistors for the Ultra-LD Mk.4 Power Amplifier module ($5.00) Add to trolley SA156 plastic bobbin ($1.00) Add to trolley (with default options) Ultra-LD Mk.3 Power Supply PCB pattern (PDF download) [01109111] (Free) Add to trolley Ultra-LD Mk.4 Amplifier PCB pattern (PDF download) [01107151 RevC] (Free) Add to trolley Active Subwoofer, Part 2: Ultra-LD Mk3 200W Amplifier Module PCB [01107111] ($15.00) Add to trolley High-Performance Subwoofer amplifier bracket & heatsink diagrams (PDF download) (Free) Add to trolley