Thanks.
I've had a lot of fun figuring out an answer to Oscar's question. I don't really have enough knowledge of the insides of theremins to know what I want there, but I enjoy well designed products and have picked up a few hints and tips along the way. It was interesting to see if I could apply them.
I love the look of the RCA theremins, not in the least part for their anachronism, but primarily because they look like furniture. I'm not keen on many of those that followed, which emulated the pragmatic aspects of the RCA - ie a nice big accessible box to build the electronics into with spindly aerials stuck on the outside almost as an afterthought. This is design for the benefit of the electrician, not the musician.
I wanted to come up with something that was respectful to the RCA design without copying it or looking like an antique, that was stripped down to the bare essentials because that is my taste, and that was iconic. By iconic I mean that it can make a strong, simple logo, and that it keys into other iconic images and be elegant. And I wanted it to be practical and easily manufactured.
How well have I succeeded in my goals?
I have tried to put the player first by de-emphasising the box of electronics and moving the focus to the aerials.
For me the key element of the RCA theremin is that it was furniture - was the prototype actually a writing bureau? I don't know. Well I don't think my design would look out of place in an IKEA catalogue, perhaps as a hat stand or something to hang your jacket on.
I don't think it could be any more minimal.
Is it iconic? not for me to judge - this is in the eye of the beholder, but certainly it is easy enough to draw, and it puts me in mind of those prairie cacti in spaghetti westerns, of the number four, and of a policeman directing traffic. To my eye the parts seem in good proportion to one another.
Finally, the most important one - is it practical. Here I have no idea. From a playing point of view I don't know if a straight volume aerial is the best choice. I should think it could be built to dismantle into five fairly obvious pieces for transporting. It might even be possible to trim the base of the trunk to suit the individual player. Or to make it somehow telescopic, although I am loathe to add complexity where it is not necessary. I suspect when people say they want the height to be adjustable they really mean they want the theremin to be the right height for them.
Some time ago I had a stainless steel pipe made to order, mirror polished and acid etched - stainless is resistant to etching, it requires sustained jets of boiling hydrofluoric acid to roughen the surface and cannot do fine detail, but big san-serif lettering looks excellent and will not rub off or fade - so I know this is feasible, if not cheap. Whereas for prototyping or home-build I fancy that a trip to the plumbers would furnish both the aerials and the trunk, perhaps even with junction points built in to attach the former to the latter. Is there some technical reason this can't actually be made? Again I have no idea, the mysteries of electronics are not something of which I have any practical understanding.
Gordon