DIY Solid State Multiplex Adaptor Plans?

[Captainclock]

Well the reason why I want a solid state one is because I don't have access to the parts to make a tube powered multiplex adaptor and at least with a solid state one, all I would have to do is get a simple PC Board Kit from Radio Shack and then get all of the components I need for making the multiplex adaptor and then follow the schematic and put it together and then get the right type of Molex Plug like what I need to hook it up to the amplifier for power and then it should be all good to go.