MOD RF

This is a description of the daughterboard attached to the main NES logic board with a 5-pin soldered header.

Versions

Alps

Parts List

Note: Surface-mount and uninstalled components are not listed

• C19-20: R 472M 4700pF 2KV ceramic disc capacitors
• C21: 2200µF 25V electrolytic capacitor
• C23: 100µF 25V electrolytic capacitor
• C25: 100µF 10V electrolytic capacitor
• C29,C35: 1µF 50V electrolytic capacitors
• C36: 10µF 16V electrolytic capacitor
• D1-4: "N 8" rectifier diodes
• L1: 2.2µH 20% inductor
• L3: 0.48H hand-wound inductor
• L4: 0.39H hand-wound inductor
• L6: 0.32H hand-wound inductor
• L8: 220nH inductor
• L9: 68µH 20% inductor
• L?: 0.1H hand-wound inductor
• Q1,Q4-5: 2SC1740 NPN transistor
• Q2: 2SC461 NPN transistor (Must use VHF-capable speeds if substituting)
• R7: 15K Ohms 5% resistor
• R19: 1K Ohms 5% resistor
• R20: 1.8K Ohms 5% resistor
• R22: 10K Ohms 5% resistor
• R24: 105 Ohms 5% resistor
• R25: 82 Ohms 5% resistor

Schematics

Components as placed on non-solder (through-hole component) side of board.