[GreenKeys] saving machines (this post teeters on being OT)...

[David Christ]

Actually there are pipe organs and there are pipe organs.  Randy is 
correctly referring to theatre organs which are generally 
electro-pneumatic.  But the organs preferred by classical organists 
have no relays and are purely mechanical.  Tracker organs as they are 
called are wonderful assemblies of rods and rocker arms, the keys 
directly controlling the pallets that let in the air.  Having been 
built for four centuries they are as the manual typewriter is to the 
Selectric.  Mechanical all the way.

David K0LUM

At 1:55 PM -0500 7/16/11, Randy and Sherry Guttery wrote:
>
>and current guiding force in the Magnolia Theater
>Organ Society - and has been actively involved with that
>since the 1970s. Pipe organs are nothing more than a
>collection of electro-magnets controlling pneumatic
>actuators that either sound pipes (pipe valves) or operate
>relays that control which pipes sound from what keys