my freelanced railroads Allegheny Federation and ARCTA since 1990 have had a in home horn known as the Allegheny nine chime
basically an A9C is a forward facing nathan P01235 and a rear facing leslie SL4T all mounted back to back on the same frame and under the same air supply
is it possible to make one or is it complete science fiction?
and what exactly would one sound like both on ground and mounted with an e bell?
how would you make one?