I have an Amiga computer I'd like to revive but sadly these amigas (and the commodore monitors) used a slow scanning frequency, that VGA monitors (or panels) can't match, even if you use a plug adapter.

I believe the key is the Amiga's 15.625 KHz scan frequency, whereas VGA uses 35 Khz or thereabouts.

I once bought a "scandoubler" but it worked just for "normal" desktop apps, games (specially those that used overscan) never looked quite right.

So the $1M dollar question is this: any manufacturer of (at this point, CRT or LCD) monitors with VGA input capable of taking these slow-scan frequencies used by the Amiga?

Background info on the Amigas and scan frequencies is at amigahistory dot co dot uk slash monitor.html

15.625 kHz is the horizontal frequency of normal PAL television. Any TV set or "video monitor" (pretty much a TV without a tuner) with RGB inputs should handle this. If you're in Europe that shouldn't be a problem at all as pretty much any TV with a SCART socket will have RGB inputs, though it'll be harder elsewhere. Problem is it seems to output RGB with separate horizontal and vertical sync, which is fine for VGA monitors but the majority of TVs or video monitors can only handle composite sync - you would have to make the sync signal composite (can be done with a couple of transistors IIRC).

Or are you looking for something capable of doing 15kHz and >30kHz frequencies? That may be harder. Any modern HDTV should be able to do this, but not necessarily via the same input, i.e. it probably won't accept 15kHz video on the VGA input but will through the analogue TV inputs (composite, s-video, RGB SCART) and similarly those inputs won't be able to take VGA frequencies. And again there's the sync signal problem in the case of RGB SCART. Some expensive broadcast grade video monitors may have the RGB with H/V sync inputs, and may even be able to handle >30kHz signals too (maybe ones designed for SD and HDTV), but I'm not certain about this, and note the "expensive" part :)

Your best bet is finding an oldmulti-sync VGA monitor designed for the Amiga, Acorn Archimedes, Atari ST and other computers from that era that output 15kHz and >30kHz frequencies. But I don't know how easy it is to get one in good condition these days, and I'm sure the large majority are 14". I don't think anyone makes these any more as there's not really a market for them.