My good friend Mike E @ Mike E’s Guitar Ranch in La Vergne, TN is the man when it comes to VOX. He has a store full of them all the time. We do repair and restoration’s for Mike so I credit him with most of my VOX solid state smarts (and for a fair collection of VOX schematics which he let me copy). Anyhow, there is a whole lot of solid state VOX stuff out there made by the Thomas Organ Co. Sepulveda Ca., manufactured sometime after the Beatles hit the scene. 

Without going into great detail let’s just say that they are all almost the same amp: The Viscount, Beatle, Berkley, Royal Guardsman, etc. Some have a fuzz in the preamp, some have the MRB tone booster, and some have reverb & tremolo. I think the Super Beatle has it all. They range from about 30 watts up to 100 watts output power. 

All have a transformer coupled driver section, which is fairly unique these days though quite common 35 years ago (and I suspect may be why they sound so good for transistor amps). 

Some used germanium output transistors, which are rare and expensive. Often if the outputs are gone, we have to modify the drive and biasing arrangement to fit silicon transistors in the output section when we can’t put our hands on the PNP Germanium devices. Common to every Thomas Organ produced VOX I ever saw: they used some of the crappiest components ever. There are about 40 of these little electrolytic buggers in each amp mounted on a primitive style PC board so that when you pull one off you get a resistor and a transistor leg with it. A great many of them are bi-polar which are thought by some to be superior sounding.