David McCurdy brought a Bachmann Annie over to be updated. Inside the tender were an Aristo-Craft 27 MHz on-board receiver and accessory board, as well as, Sierra sound and adapter boards. David wanted to keep the Sierra sound board and a huge upward facing speaker, but everything else was removed. The new components to install were an Aristo-Craft Revolution receiver and adapter board, as well as, a Cordless Renovations lithium-ion battery pack. As I had never seen a Sierra sound board before, it was fortunate that David still had the manual. After reading it cover-to-cover, I began drawing a plan to squeeze it all in the tender. http://freightsheds.largescalecentral.com/users/son_of_a_cnr/_forumfiles/Wiring.bmp Although a number of modifications were made to the plan along the way, everything fit and worked well.
The linking button, battery pack switch, charging connector, and volume control (and programming) switch were all mounted on the front wall. The smaller connector provides power to the motor, while the larger connector powers the front light and activates the chuff sound.
It’s unfortunate that Sierra no longer make sounds boards for large scale trains, as this one sounded very good. Many of the sound functions could also be modified by using the volume control switch to re-program it.
