This one was a massive electronic organ that I bought from a second hand furniture shop.  It was blocking their doorway and not working so I was able to agree a very low price for it.

Unlike the Thomas, this one pre-dated transistors and used thermionic valves.  I think that there were about 72 of them, mostly double triodes so it was quite complicated and gave of a lot of heat.  I had to teach myself enough electronics to understand it and eventually got it into full working order.

It used a drawbar system, similar to that used by early Hammond organs.  However, unlike Hammondsit did not use mechanical tone-wheels but all of the sounds were created electronically.  The drawbars allow you to mix up to eight harmonics to create the sound that you want.

This organ had two full-size manuals and a full pedalboard.