This is a fully assembled, plug and play RF modulator replacement designed specifically for Commodore 64 longboard breadbin systems. It is compatible with all revisions of the original Commodore 64 longboard and is not intended for the 64C shortboard or Commodore 128.
Installation is simple and straightforward. Desolder the original metal RF modulator can, align this board with the existing eight pin footprint, and solder it in place. The board installs right side up with the silkscreen oriented correctly when mounted on the motherboard. No trimming or tuning is required. The circuit is fully pre tuned and ready to use immediately after installation.
This unit ships fully assembled and ready to install. No assembly is required. If you are interested in a DIY kit version instead, feel free to message me and I can provide one.
The entire design uses through hole components only. No surface mount devices are used. This keeps the look, construction style, and serviceability consistent with the original Commodore 64 hardware and matches the aesthetic of the machine internally.
This replacement is built directly from the original Commodore 64 RF modulation schematic, preserving correct signal levels and timing. The result is stable color, proper luminance, and clean RF output without artifacting or distortion. It replaces the original steel can modulator, which commonly suffers from corrosion, aging components, and poor internal PCB quality.
The board is manufactured using a high quality PCB with ENIG gold immersion finish for excellent corrosion resistance and long term reliability. Compared to the original internal RF module PCB, signal integrity is significantly improved through modern materials and clean routing, without altering the original circuit behavior.
This is an ideal solution for restoring a breadbin Commodore 64 with a failed or degraded RF modulator while keeping the system electrically correct, visually appropriate, and period accurate in operation.