Marconi TF2018

This Marconi signal generator (TF2018 also TF2019 also TF2018A) does not appear in your Manuals-Electronics-Test Equipment section. But a separate search on your site does produce 3 files somehow. Are these files somehow indexed differently or am I entering the wrong thing. I am not worried now, but other people might have the same difficulties.
Thanks for your very helpful site. Billn M0wpn

As far as I can se, they are in the Marconi folder.