062702
Theremax 13
We can now put the circuit board assembly aside while we do some
pre-wiring to the Control Panel. This would be a good time to check
your work on the circuit board to this point. Make sure polarized
components are placed properly and be critical of all your soldering
joints.
PANEL CONTROLS
If you have the optional Lectern Case, the controls, jacks and
switch mount to its face plate as shown in Fig 2.
( ) Using the flat washers and nuts supplied,
mount the six potentiometers to the rear of the
panel as shown in Fig 2. Note that three different
pot values are used. R79 & R80 are 1k (1000 ohm),
R81 is 100k (100,000 ohm) and R82, R83 and R84
are 10k (10,000 ohm) units. Orient the controls so
the solder lugs are positioned as shown in fig 3 and
fully tighten the nuts to secure them.
A Tip: marking the part number (e.g. R79) on the back
of the pots with an indelible pen will make later wiring
easier and less prone to error.
( ) Using the flat washers and nuts provided, mount
the miniature toggle switch S1 as shown. Fully
tighten the hardware.
( ) Using the nuts and washers supplied, mount
the six 1/4" Phone Jacks to the Control Panel.
Notice that Open Circuit Mono Phone Jacks are
used for all except J2, which is a Stereo Jack.
Orient the jacks as shown and fully tighten the
hardware. You may find it helpful to write the
part number under the jack with a marker.
Before beginning to wire the panel components it will be helpful
to "tin" the lugs of the pots and jacks by melting a small amount of
solder onto the lug. Because of the mass of the lugs it will take a
lot more heat to melt solder onto them than was required while soldering
parts to the circuit board. Melt a little solder onto the tip of your iron
and hold it against the lug until the lug is hot enough that solder melts
when touched to it. Do not fill in the holes and do not leave large blobs
of solder on the lug. This step will make soldering the wires to the lugs
in later steps considerably easier.