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C64-rf modulator replacement

christianeisendle·c64-rf-modulator-replacement

C64-rf modulator replacement PCB layout, top view — open source board by christianeisendle

About the C64-rf modulator replacement PCB

C64-rf modulator replacement is an open source PCB design by christianeisendle, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 58.4 × 45.7 mm, with 28 components from 13 distinct parts.

Other key parts include the LD1117S33TR and THS7314. By type, the board carries 10 resistors, 9 capacitors, 3 ICs, 3 connectors and 1 diode.

It belongs with the retro computing designs in this gallery.

From the project

Yet another C64 RF Modulator Replacement

The testpoint labeled C exposes the Chroma signal and L the Luma signal. Next two these two testpoints there are vias (blue circled) with removed solder mask which can be used for low-inductive probing. Power up the C64 without a screen connected. Connect a scope to the testpoints and use the corresponding Luma and Chroma trimmer (right in the picture) to adjust the required signal levels: - Chroma: 0.3Vpp - Luma: 1Vpp

C64-rf modulator replacement, from the project README
From the project README

Main components on the C64-rf modulator replacement

LD1117S33TRTHS7314

C64-rf modulator replacement bill of materials (BOM)

28 components, 13 distinct parts.

QtyPartRefs
1
LD1117S33TR
U1
2
THS7314
U2, U3
2
C64_RFCon
J1, J2
1
S-Video Out
J3
2
1k
RV1, RV2
1
1N4148WT
D1
3
1u
C1, C9, C10
1
4u7
C2
5
100n
C4, C5, C6, C7, C8
1
220
R1
1
1k
R2
3
tbd
R3, R4, R7
5
75R
R5, R6, R8, R9, R10

C64-rf modulator replacement design files

The KiCad project lives in the christianeisendle/c64-rf-modulator-replacement repository on GitHub; these links point at the commit this page was built from.

C64-rf modulator replacement: common questions

How big is the C64-rf modulator replacement PCB?

The C64-rf modulator replacement measures 58.4 × 45.7 mm, has 4 copper layers and is 1.64 mm thick.

How many components are on the C64-rf modulator replacement?

28 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the C64-rf modulator replacement design files?

From the christianeisendle/c64-rf-modulator-replacement repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the C64-rf modulator replacement design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which christianeisendle chose for the repository.

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