Originally Posted by ctr:
Dale H,
If you are still monitoring this, how can I achieve 22 micro henries at 4 amps by using the physically smaller lower amperage rated chokes? Do you know the stock number for the items that you suggest?
They would be 2 different chokes to use. There are numerous choices on www.Mouser.com
Example for passenger car or caboose lighting with circuits that use capacitors here are some 560 ma ones ( .56 amps)
http://www.mouser.com/ProductD...jEkrAJ3p5ReJIFMuo%3d
Example for input to an entire engine circuit engine here is a 6 amp one
http://www.mouser.com/ProductD...2vGXnf%252brGgCYM%3d
Keep in mind I am not an electrical engineer and because of the proprietary nature of the DCS system,these are only educated guesses as to impedance and not values based on any scientific engineering or calculations. The amperage should be sufficient as a 6 amp inductor could handle the current as the engine would use over 100 watts at 18 volts if 6 amps were pulled,the engine would not normally pull anything close. Perhaps one of the EEs on the forum could give their input. Dale Manquen of the Forum explained once that capacitance could cause signal reflection so perhaps the values are not that critical as it would be in other applications.
What puzzles me is that most engines with sound, even MTH engines probably have power supplies in the boards with capacitors to supply + 5 or whatever is used. Perhaps PS2 electronics have chokes in built in the boards.
Signal issues vary from layout to layout as I have read. I run conventional so this is not an issue for me and I have no direct experience. I have made lighting strips for people who use DCS and have no reports of signal problems,but I installed the chokes in each strip as in the post linked before for caboose lighting. If you get stuck I may have some chokes in my parts drawer,I would have to look my shop is a mess right now. However the 6 amp one listed does not seem that big.
Dale H