The same is true with the TU20.
> On Aug 7, 2019, at 10:06 PM, Paul Anderson <used...@gmail.com> wrote: > > I think you could change heads in a TU10 and add or take out a few boards. > I've worked on 7 and 9 track versions in the day. > >> On Wed, Aug 7, 2019 at 6:43 PM Michael Thompson via cctech >> <cct...@classiccmp.org> wrote: >> > >> > thanks a lot for your hint to the DEC controller. I wasn't aware that the >> > TM11, TMA11 and TMB11 controllers can handle 9-track as well as 7-track >> > NRZI-encoded tape drives. However, all these controllers seem to be very >> > rare in the public out there. Not too surprising considering that DEC TU >> > and TS tape drives themselves are rare and that 7-track tape drives were >> > soon replaced by 9-track tape technology in the early days. >> > >> > With best regards, >> > Pierre >> > >> >> The TC58 Magnetic Tape Controller for the PDP-8 and the TC59 for the PDP-9 >> can be connected to both 7-track and 9-track drives. The TU20 drive on the >> PDP-9 at the RICM is a 7-track drive. The only difference between the >> 7-track and 9-track versions of the TU20 is the tape head. All of the tape >> drive electronics is the same for both versions. >> >> -- >> Michael Thompson
