Epson L90P - TM Two-color Thermal Line Printer Manual de usuario Pagina 30

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A metal
strap arrangement
can be
mounted
on
the rear
of the
plas-
tic
case
so that the wireless
microphone
can be carried on the
user's belt. The microphone can
be
hand carried
or
mounted
on
a neck strap for lavelier mike.
Tuning capacitor
C7 is soldered
directly
to the outside turns
of
coil L1. The loose wire
seen
is
the connection
to the antenna.
it
can
be adjusted through a
small hole
drilled
in the plastic cover.
To
duplicate
the author's mike, make
the metal (
aluminum) mounting
chassis
and
battery clamp shown in Fig.
8. The
two
holes marked A
and
B
are used
to mount
the
finished
perf board, using
:'.s" fiber
spacers with suitable
mounting
hardware.
Small threaded
nuts
are
swaged into
chassis
holes
sc that the
finished
metal chassis can be mounted
Completed, mountec wireless microçt ene fits into
small plastic case. Tuning capacitor C7 is acces-
sible
through a
small
tole
in
the
plastic cover.
32
within the plastic
case using suitable
screws
from
the
rear of the
case.
The lip of
the 9 -volt transistor radio
battery mounting clamp is mounted
to
two more holes.
Once
the clamp
is in
place,
insert
the
battery between the two
panels
and use
1 -inch mounting
hard-
ware between
the upper holes to secure
the
battery in place.
The
antenna
is
made from
a
2's"
-long
piece
of "u; "- diameter brass rod that has
one end threaded. Mount it on one end
of the plastic case
with
a soldering lug
between
the
mounting screw
and
the
plastic
case.
The lug
serves as the an-
tenna connector.
Mount miniature
potentiometer
R5,
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