@gunrunnerjohn posted:
...Rod, one question, why didn't you use the 4-pole filter for the job? It's proven to work, so I was curious why you cut it short?
@Rod Stewart posted:...
To save some board space I deleted 2 stages of the original RC filter network, because I noted when testing mine with a scope there was no difference in output signal after 2, 3 or 4 stages. I have tested this with the portable tester and it behaves exactly the same as with all 4 stages.
Maybe the smaller board size makes it easier to cram into the TIU case?
I'm pleasantly surprised it works on a working layout rather than just on an unloaded detached TIU output. I figure one would become familiar with the kind of flashing patterns for various DCS operations/commands.
I suspect one will see random flashes due to track voltage transients which might prove to be another application of this gadget. In other words, when there is no DCS activity if there is, say, a dirty section of track I would expect some flickering of the signal indicator. So over time if the flickering gets worse it can indicate the need for some track maintenance!
