Yes, I've caught several errors in his book, but it is a decent overall reference. I will note this error when I write up the radio for my website.
We all make mistakes. Even one of the the prior owners of the NC-155 who replaced the receive/ send switch with a DPST made a rather serious mistake. Dead set. It would have worked OK if he had not mixed up the connections. Yes, B+ on the back terminal strip.
I wonder if a shocking experience was why it was sold.
Hey, the hamfest price was right. I will replace the switch with a DPDT since the original design was to turn ON a device connected to the terminal strip when switched over to send. (And that terminal strip device must never see B+)