Posted By Mickeyls on 02/22/2008 7:12 AM
Paul, another question. You mentioned you left the original sound card. Is it tied to the R/C unit, or does it use the same switch as before???
The battery packs are made up of 8 NiMH AA cells in a battery holder for 9.6 volts. When our club members first began using them for power cars and locomotives, sealed packs were expensive and not readily available. Two packs will produce 19.2 volts which is great for the receivers we use, and will run an Annie for hours and hours.
Some feel these packs are unsafe because of the spring terminals, but we have never had a problem with them during years of running. Although I have never had a cell fail, replacement would be simple and inexpensive. The Radio Shack chargers we use safely charge a pack in 8 hours without overheating the cells.
Using the proper charger prevents accidents and prolongs battery life.
The factory sound card (chuff only) is connected to the locomotive with an MU plug that comes with the tender. A 9 volt battery under the water hatch provides the power. The sound card is completely independent of the receiver and its battery packs, and operates with the factory switch as before.
The Bachmann white MU plugs are the rear light and sound. In my power conversion the rear light was connected directly to the receiver’s lighting circuit, and the MU plug for the light was connected to the receiver’s motor outputs. The shorter black plugs are for on-board battery charging.
If you would like to see how I changed my Annie to on-board, battery power and radio control, just click on the following link.
ovgrs.editme.com/Annie
Although this was my standard set-up for on-board battery power and radio control at the time, 7.2 volt battery packs and an RCS radio receiver could also have be used. The members of our club that have used them in their Annies are quite happy with their performance and radio range.