Edoardo kinmami
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Apr 15,2021
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Commodore 64 and 128 (C64 / C128) RF modulator replacement

Inspired by projects from c0pperdragon, mbarszcz-pcb, tebl and VGP. It fits any kind of commodore 64 and 128 and replaces the RF modulator.
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Published: Apr 15,2021
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Topic
DIY Electronics
Hardware
Computers & USB
commodore C64 C128 modulator composite video computer
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  • For a C128. Do I use the short board or long board pins?

    Oct 10,20241 Comments
    Edoardo kinmami 2024-10-11 15:52:53Reply

    C128 is equivalent to a C64 SHORT board

    Reply

  • this is a new project you might be interested into https://www.pcbway.com/project/shareproject/Commodore_64_128_RF_Video_modulator_bypass_replacement_Jail_bars_removal_long_sh_6e44f5bb.html

    Jan 14,20240 Comments
    Reply

  • THS7314 can be used as well if THS7316 is not available

    Feb 06,20230 Comments
    Reply

  • How do you got this to work on the c64 "long board"? No signal when installed on the c64, works great on the c128.

    Dec 23,20222 Comments
    Edoardo kinmami 2022-12-24 06:52:06Reply

    Are you sure header pins (outer strip lines) are well connected to the motherboard? Have you solder a wire from the shield area of the original RF mod to the board (see the top left round pad)? What about the solder jumper for 12V VIC-II chip? I have tested on C64C/128 PAL and NTSC and old breadbin models PAL and NTSC without any issue so far

    Tien Ton-That 2022-12-27 15:18:37Reply

    Thanks for answering. That was it, missing ground line to the board.

    Reply

  • What are the improvements over the THS7316 version by c0pperdragon? Thanks!

    Jul 13,20212 Comments
    Edoardo kinmami 2021-07-13 21:44:34Reply

    equivalent design and performance, I suppose. The only difference is that I inserted a EMIFIL bead in series to the THS7316 (to reduce HF noise from the power supply) and improved the decoupling of the LDO (especially useful in case of UNREG 9V).

    darrell westbury 2021-07-23 23:15:04Reply

    Thanks for the response. I've made about 5 of these now and they all seem to work great. Appreciate you sharing the design here.

    Reply

  • Is there a BOM list for this?

    May 20,20211 Comments
    Edoardo kinmami 2021-05-20 06:25:20Reply

    Hi Doug, yes there is. I have uploaded the BOM list. Thank you

    Reply
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