I've gotten great response from the group - thanks. It seems one can buy lots of AF stuff before you're knowledgeable about what you're buying and can ask the right questions. I bought this 761 from a reputable dealer, but there are some things I don't understand. I just got the semaphore and it's box but nothing else - what else should there be, a two button push button red/green? A track trip maybe? Or is this from some cow or logging camp thingie and "this is it"?
Also, I have the K-line book and show the hookup for this - why do I only have 4 wires and no black wire?