Identify a Morrow transformer

Another common-ish primary winding configuration, beloved of HP amongst others [1] is to have 2 primary windings. One is 120V (2 connections), the other is 120V, tapped at 100V (3 connections). You can wire them up to work with : 100V mains : Input to the 100V part of the winding, then the 2 120V windings in parallel. The tapped winding acts as an autotransformer to step up the mains to 120V for the plain winding. 120V mains : The 2 120V windings in parallel, mains across them 220V mains : 120V winding in series with the 100V part. 240V mains : The 2 120V windings in series. [1] I've only really seen it in HP devices, but it must have been standard in that I've seen a combined mains input plug/filter/voltage selector assemnly where the last part was clearly designed for this sort of transformer. Given that configruation of primaries, which uses 5 connections, you have 5 left for the secodnaries. The obvious combination would be a simple winding to give 8V DC (regulated down to 5V) and a centre-tapped winding to give 16-0-16V DC (regulated down to +/- 12V) I suppose another primary configuration could be a pair of 115V windings (paralllel for US mains, series for European mains) with another terminal used for an inter-winding screen. I would start by using an ohmmeter to work out just what is connected to what. That will tell you how many windings you have, if they're tapped, or whatever. A terminal that connects nowhwere (assuming a good transformer!) is a screen, most likely. -tony