I dabbled with rasters a few years ago, and i'm aware i'm out of touch and technology will have moved on since I had access to raster design.
I have a friend who has asked if anyone can help restore this schematic for him. He can't get a good scan of it, but does have a picture.
The history behind it is quite interesting as it is a 1950's welder with this schematic on the inside panel.
This is what he's said about it.
"
Took a chain block to unload it, modern tig welders with loads more features are the size of a suitcase its badged as BOC but even they have no record, from what i have found on tinterweb it was made by P&H in america and rebadged over here by BOC before they even made there ADR welders. P&H stopped making welders in the late 50's
information is scarce hence wanting to preserve the schematic, dont get me wrong its not a heap its awesome! so old there are no electronic devices and can be mended with spanners and hammers, even the gas timers are mechanical, just a huge steel box filled with transformers "
If it's possible can anyone give me any tips on how? If its not possible, it helps to know.
Ta