[Hallicrafters] S-107 Alignment and Mark 1/2 Differences

[Julian Bunn]

I am in the process of aligning my S-107 Mark 2 (now that I have
replaced the missing 3rd. IF can ... thanks Gary!) and am slightly
confused by a reference in the Alignment Instructions for the
Mark 2 to setting the Tone control to High.

There is no Tone control on my Mark 2.

The S-107 picture in Chuck Dachis' book shows a Tone switch in
the position where the Phones jack is on my Mark 2. Perhaps that picture
is of a Mark 1? (Also, curiously, his S-107 picture shows no
evidence of the speaker grille holes on the top of the receiver:
where was the speaker mounted?)

It's odd that this difference would not be observed in the Mark
2 alignment instructions.

Can anyone here confirm that the Tone control on the Mark 1 was
replaced by a Phones socket on the Mark 2?

Thanks!
Julian