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2 x HN3A51F + 1 x IMX8-7-F + 2 x BC846C transistors for the Ultra-LD Mk.4 Power Amplifier module
A pack of three dual transistors and two standard transistors:
2 x HN3A51F dual PNP transistors, 120V, 100mA in an SM6 package
1 x IMX8-7-F dual NPN transistor, 120V, 50mA in a SOT-26 package
2 x BC846C high-gain NPN transistors, 80V, 100mA in an SOT-23 package
These transistors are required to build one Ultra-LD Mk.4 module. They have been discontinued and are now hard to get.
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SA156 plastic bobbin
An SA156 plastic sewing machine bobbin which can be used for winding high-current air-cored inductors in the range of about 1-10µH. 6mm ID, 20mm OD, 10mm height.
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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.
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Ultra-LD Mk3/Mk4 Amplifier Power Supply PCB [01109111]
PCB for the Ultra-LD Mk3 Amplifier Power Supply. Also suits the Ultra-LD Mk4.
PCB with plated through holes, solder mask and silkscreen overlay.
141 x 80mm.
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Ultra-LD Mk.3 Power Supply PCB pattern (PDF download) [01109111]
PDF with the PCB design for the Ultra-LD Mk.3 amplifier power supply (single-sided).
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Ultra-LD Mk.4 Amplifier PCB pattern (PDF download) [01107151 RevC]
PDF with the PCB design for the Ultra-LD Mk.4 200W RMS Power Amplifier (double-sided).
Both layers are in a single PDF.
Note that due to the complexity, it is impractical to etch this board yourself. This is provided mainly as a reference.
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