Yes, it's tricky to get a good picture, but I've never seen a Voltmace - maybe it's easier with them?
I bought an old Grundig TV and a Super Play Computer 4000 to have a better picture. Together with an adapter to play Radofin, Acetronic, etc. games on an Interton console, I can now play two of the big game libaries in perfect quality.
You can find them on eBay sometimes. The problem is that they are to big for shipping and you need to find one in the area you're living. I've waited a couple of years to find one and had to drive 50 km for it. I have a list of the models you can use somewhere. I'll post it here when I've found it.
There is also a list here, but it's incomplete.
Okay, I've found the list:
Serie Super Color 16 T 26
Super Color 16, Artikelnummer 8645
Super Color 16, Artikelnummer 8245
Super Color 16, Artikelnummer Eleganz 8245
Serie Super Color 30 T 26
Super Color 30, Artikelnummer Eleganz 8285
Super Color 30, Artikelnummer 8285
Super Color 30, Artikelnummer Hohenstein 8285
Super Color 30, Artikelnummer Trutzenstein 8285
Super Color 30, Artikelnummer Amalienburg 8285
Super Color 30, Artikelnummer 8685
Super Color 30, Artikelnummer S 8285
Super Color 30, Artikelnummer W 8285
Super Color 30, Artikelnummer S 9285 Video
Super Color Cinema 9000 (Beamer!)
I would like to have a Cinema 9000, but they are still not cheap (100-200 Euro) and really heavy (about 80 kg)...