Replaced Pass Car Lights . . . now flickering?

While this is somewhat redundant, I haven't seen it said this way. A capacitance across a circuit is a short circuit to high frequencies. And putting an inductor in series to the capacitance heavy circuit behaves as an open circuit to high frequencies. So the inductor in effect removes the shorting effect to the high frequency control signals.

The sizes of the capacitance or inductance determine how much of a short or open there is. And rules of thumb on what seems to work well as to size are what is being recommended here.

That's it in a nutshell Chuck.

First off, thanks all who have added to my education in this thread, especially to John and Stan for specifics on what I should order and how to install the components.

Secondly, I really can not believe that Digikey got them here today. And without it costing an arm, leg and kidney! As a Canadian, I am not used to this level of service!!

I have installed my first capacitor and choke, picture attached. Flickering is gone!

One down . . . 7 to go.

Great, now you're an expert.

Digi-Key is great, my favorite place to order from. They have many more things to assist you on their website, one is keeping a list of all your orders. If you need more of something you have previously ordered, it's all right there. I also found Digi-Key from a GRJ recommendation for a part.

Thanks for the response on the 22uh choke and I am on board with installing it when capacitors are introduced in DCS train lighting, so that the DCS signal is not shorted to ground.  

It is also discussed above, to put inductors in TMCC engines between the pick up and the TMCC board. I would assume the TMCC inductor would only be needed if you had a TMCC & DCS engine concurrently running off the same TIU port or you were using a ”DCS Remote Commander” where you only have one DCS track connection.  If using a TIU and had TMCC and DCS engines running on different TIU ports, I would assume the TMCC engine would not reduce the signal to the DCS engine, as the DCS engine is on a different TIU port.  Is my assumption correct?

Thanks,

rad400

You're correct, if they're not on the same track (or TIU channel), they won't affect the DCS signal.  Each channel of the TIU generates an independent DCS signal.