Back in the 1970’s when MPC first came out with whistles (8206 Steamer),
and horns (mostly in dummy GP-20 units), they required the use of a special
activator botton that rarely worked correctly, and often burned itself out.
I have since had a new sound unit put in my 8206, but I have a group of these dummy GP units that have these horn units in them.
any ideas out there on how to get these horn units to work???
Ken