No. 6 setscrew wrench inserted into worm.
primary clutch load may cause the motor to stall
all later models, tension is adjusted by turning the
retainer on its screw thread.
Make a static
measurement of the secondary clutch tension.
Warning: Never run the motor with the clamp
screw (G) loose, or the gears may be stripped.
With the motor stopped, and the string wrapped
b. Secondary Clutch.
The secondary clutch
around the drum, pull the string to rotate the
tension should be approximately one-half that
drum while reading the scale. Be sure that the
of the primary clutch (6 to 7 ounces). In Facsimile
measurement is taken when the dog latch is
T r a n s c e i v e r s TT-1D/TXC-1, TT-1E/TXC-1,
engaged with the secondary clutch ring to obtain
and TT1F/TXC-1, the secondary clutch tension
a correct measurement. The secondary clutch
should be between 3 and 6 ounces. If the second-
tension is adjusted by means of screws (P, figs. 115
ary clutch is too loose, the stop arm and dog trip
and 116). If screws work loose, lock the heads in
will come together too rapidly and possibly throw
place with glyptal after making correct adjust-
the motor out of synchronism or slip the primary
ments. Before using glyptal, remove all grease
Clutch. Slipping of the primary clutch during
with solvent (SD). If the screws are of the slotted
the phasing operation will result in out-of-phase
type, spread the sides slightly by inserting a small
recording. If the secondary clutch tension is too
heavy, the secondary clutch load added to the
screw driver or knife into the slot.