Recalbox Jamma and VGA 31khz

[cwoo]

I bought a Recalbox RGB Jamma and a Raspberry Pi5 and I was wondering what is the best way to connect it to a VGA 31khz arcade monitor? I have a Sega New Astro City and my particular monitor/chassis only supports 31khz (no 15khz or 24khz). It has a VGA DB15 port and doesn't use the video signal from the jamma edge.

Is a HDMI to VGA adapter the only way to go? I am wary of the active processing of the adapter. Trying to get a pure native 31khz signal with no lag.

Should I have bought the Recalbox RGB Dual instead and adapted the jamma controls to USB?

Any advise is appreciated!

[gelo29]

Hi,
HDMI to VGA adapters are always a lottery.
There are some great picture quality adapters, but majority is really poor.
From my experience, I can only recommend legacy DeLock series (with red/black HDMI plug), but they are hard to find and rather expensive.
Personally, considering picture quality, I would go with RGB Dual - it is safe and reliable option.
As for jamma to USB control adapters, unfortunately I have no experience at all.
Hope this helps.