Today I had finally the time to look after my HP 7970B tape drive. After cleaning and adjusting the mechanics and electronics and some tests, I was planning to hook it up to my HP 2113B processor and found out.... I'm having a HP 7970E interface set, the HP 13183A, and I need the HP 13181A/B interfaces. So if there is someone who wants to trade a set HP 13183A boards with manual for a set of HP 13181A/B boards I would be very very happy.. -Rik