I got to thinking about spots inside industries and how to tell when we've suitably coupled onto a car - without damaging the car or coupler or knocking the back wall of the industry into the side wall of the adjacent industry.  Thinking about something is good.  Not coming up with a solution is not so good.....

Look what arrived in the mail today!

Thank you guys for such a great deal...

Jas...

I have installed a dozen blocks using current transducers (CT) to sense presence of an engine (or lighted car) in a block. I use DCC. The circuits were designed by Bill Hudson (see hudsontelcom.com). Some of my signal heads work fine. Some are showing a double indication, ie, the clear signal (green) stays lit. I can't figure out what's causing the problem even with Bill's guidance by emails. All the circuit boards work correctly if I install them in a block where a signal head works properly.

I've just learned about shelf couplers on another forum. I was wondering if anyone here uses them on layouts with lots of grades or mountain railroads. Are they too much of a pain to uncouple using skewers in yards, etc.? My grades are 2.7 to 2.9 and a runaway decoupled car goes a long way fast so thought about trying shelf couplers.

I'd appreciate hearing any Operations Session experiences you might be able to relate using them.

Thanks.