Edoardo AUTERI

https://hackaday.io/project/180442-rmixx500-amiga-500-mainboard Fully tested

I assume the video cable is 75 ohms and the termination at the CRT monitor (or video upscaler + LCD) is also 75 ohms. Pls verify on your side if...

CT1 enlarge the pad holes

CN6 pin layout is wrong - BOM list updated

to replace power resistors R91, R92, R94, R95 and R39, R40 with polyfuses (BOM list updated with the commercial p/n)

R32 for MOS 6581: to align the schematic and the interactive BOM list

https://www.digikey.com/en/products/detail/laird-signal-integrity-products/28L0138-80R-10/1015875 https://www.mouser.it/ProductDetail/Laird-Performance-Materials/28L0138-80R-10?qs=qgZcrvoyHAd98f%252B0tLOU0Q%3D%3D

> Thank you for your answers ! Three questions are left: > > I found these here at rs-online.com: DSS1NB32A271Q91A This should be a better equivalent for the Filters found...

Hello. I have personally tested the listed parts without any problems, so I'm not certain about the root cause. You can try using an alternative part and let us know...

I have tested PAL machines with different custom chips. Please try with this ferrite https://www.digikey.com/en/products/detail/kemet/B-01-RS/10442402 It is designed for signal / audio line filtering. The central holes in your PCB...