Thank you for your book and your passion in writing it, Gianni. I?m also a TEK and K lover, but I don't have much free time to work with. I would like to study the analog internal workings of the jetronic one day, but there are a lot of custom bosch chips and little information, but that's another story. I recently received a 7854 that I just fixed up and I'm looking forward to hooking it up and making measurements with it. I think there is a printing error in the graph on page 257 (7A22 CMRR, 20mv/div-10mv/div, should be 20mv/div-10V/div)
Best regards!