TEX uses only the TFM file, which
will produce if it's in a font-making mode.
(The book, Appendix F.)
Most DVI drivers read the PK font format,
but makes a GF (Generic Font) file.
So we need also to apply the GFtoPK utility:
gftopk myfile10.300gfto produce the wanted `myfile.300pk' (or, on MS-DOS, `myfile.pk') PK font.