This is a modified version of AMIRGB2VGA ULTIMATE from 

Ember EmberHeavyIndustries,

https://www.pcbway.com/project/shareproject/AMIRGB2VGA_ULTIMATE_6bd4d0e4.html

My goal was to make the adapter smaller and reduce its thickness.

I removed the CSync signal switch for the Sony PVM monitor and such.

I think not many people use it anymore.

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Quote from Ember:

Fully buffered Composite HSync and VSync signals

Impedance matched inputs and outputs

Fully high quality buffered video signals

Fully filtered spurious input frequencies: no more vertical bars on LCD screens !

Four user selectable filter settings: precisely match your display resolution for perfect quality !

Smaller than the original 390682-01/03 VGA dongle by commodore

User can freely select any of the four low-pass filter profiles, to either match resolutions for maximum clarity and clearness; available profiles are:

SD -> 9.5Mhz

ED -> 18Mhz

HD -> 36Mhz

FHD -> 72Mhz

In the case of the Amiga series computers, it is basically a matter of calibrating the filters for two major cases: OCS/ECS and AGA.

In the first case, filtering calibrated at 9Mhz or 18Mhz is appropriate, while in the second case it is appropriate to increase the bandwidth, filtering around 30Mhz.

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DB 15 VGA CONNECTOR:

Recommended fitting procedure:

fit U1 and U2

then all the resistors and capacitors

finally the switch SW1 and connectors J1 and J2

Components:

• U1 THS7368IPW TSSOP 20
• U2 74HCT14PWR TSSOP 14
• C1 10uF 0805
• C2,C3 100nF 0805
• R1-R6 75R 0805
• R7,R8 100R 0805
• R9-R12 100k 0805
• SW1 switch 3x SMD
• J1 VGA D-sub 15 pins Female
• J2 DB23 D-sub 23 pins Female

The thickness of the PCB must be 0.8 mm.