How to troubleshoot IF strip

[miniman82]

I have the factory probes, thanks to John Folsom. Also, thanks to Bob G for the 415. All I had to do was fix the 45.75 pix marker, and it was good to go.

I guess what I'm asking is how do I tell which stage is the one causing the response to get all messed up? At this point the most I've done with the 415 is align a chassis that wasn't too far off to begin with (Bob's CTC-4).

The response curve I'm seeing seems to be stretched out, like someone wrote the correct curve on a piece of rubber then pulled it lengthwise. I seem to recall my CTC-4 had almost the same thing going on, which turned out to be the tuner link comensation network. I don't think this chassis has a tuner link network, so where to go?