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Page 3
4,
The
resistors are connected to the rotary switches before
the switches are mounted
on the panel. One switch should IJc completely wired before the second
IS
started. To ht'ljl
in getting the resistors in the proper sequence, the lugs around the outl'r edge(){ the rutary
switches should be regarded as numbered in the manner as shown
111
the- draw
in~.
The
SIII~
gle inner lug of the switch should be used as a reference starting- point.
When.viewtng
the
switch from the rear, the
numberin~
system should be visualized as counterl"luckwise,
starting from the locating inner lug with the lowest resistance value. See the Chart on
Page 4.
5.
Begin the
actual wiring by first
connecting a 1-1/2" wire to the
single inner lug.
sistor lead and
dressin~
the lead
throu~h
the switch lur-:.
After the resistors havc· IH·c·n
n1ounted on one switch, proceed to wire the second switch in a similar
n1anJH'L
Suldcr
connections.
6,
Mount the switches on the panel using a control lockwasher between the switch and panel.
The switch with the r-:roup of resistors from 15K to 10 mer-:ohms should be located nearest
the two terminals.
Position the switches so that the
sin~le
1nner lur-:s are as shown 111 the
pictorial.
KEEP TOTAL HEIGHT BE)..OW DIMENSION
INSURE PROPER FIT IN THE CABINET
SHOWN TO
WIRE RING)'
WIRING PICTORIAL
7.
Slip the figure 8 wire ring over the leads of the resistors so that the resistor leads are in-
side of each of the figure 8 loops.
The loops should be pushed close to the res1stor bodies
and then the leads bent partially around the wire loops so as to make a good mechcullcal
joint.
Flow solder smoothly over each joint and trim off excess resistor lead,,.
8.
Following the pictorial, connect the two wire leads from the rotary switches to the proper
lugs on the SPDT switch, a wire from the figure 8 ring to the input terminal shown, a le-ad
from the center lug on the SPDT switch to the other input terminal.
9.
Refer to the knob preparation detail and snap the knob pointers onto the knobs as shown.
10. The knobs should now be put on the switch shafts so that they index properly.
One easy
method, which does not require measuring equipment, is to look at the edge of the rotary
switch and note the setting of switch lug; contact wiper. It can easily be spotted if the shaft
is rotated.
For example, if the wiper is in contact with the lug on which the 6.8
me~ohm
resistor is mounted, set the pointer to the 6,8 megohm panel marking and
then tighten the
knob setscrew. This procedure should be followed for the mounting of both knobs.
11.
Place the entire assembly in the cabinet, run the four long screws through the panel and
tighten them so as to hold the assembly firmly i11 place.
This completes constructic.n
<)[
the kit.
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