Posted by Gus Pratt on June 24, 2000 at 11:32:49:
In Reply to: electronic valve action tuba. posted by Dave Cowie on June 22, 2000 at 19:23:12:
One might be able to get by without the electronic part of you system. If one wanted, they could have the pistons of the tuba activated by compressed air, then the valves that actuate the air cylinders could be placed anywhere within the range of the hoses. Then you no longer need to worry about a power supply.