Simpson 1000 - Line Adjustment; Set the RANGE

TUBE INFORMATION
PUSH BUTTONS
TUBE FIL BIAS RANGE TOGGLES SHORTS VALUE
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6AG7 6.3 60 38 015 402 030 Oll EFH H
FIGURE 3. TYPICAL TUBE TESTER DATA
ON THE ROLL CHART
ode, 5; control grid, 4; screen grid, 6; suppressor, l; and
plate, 8. Some manufacturers have an internal shield con-
nected to pin 3. As an example of the function of each part
of the Model 1000 through the complete tube test, consider
what happens in the tube tester as each step of testing is
performed on a 6AG7 tube.
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You have connected the power input and adjusted the
LINE ADJUSTMENT control. The toggle switches are
all set at 0. These steps are basic for all initial set-
tings, as shown at the beginning of the operating in-
structions.
Set the FILAMENT switch at 6.3. This connects 6.3
volts AC from ground to the #1 contact of each toggle
switch in the group A through J.
Set the BIAS control at 60. This is a setting which was
determined experimentally in the Simpson Laboratory,
and will furnish a satisfactory voltage to one of the
contacts in the LINE TEST push switch. This voltage
will be used as bias voltage for the tube when you eval-
uate it.
Set the RANGE at 38. This is a fine adjustment of the
meter sensitivity which was also determined experimen-
tally in the Simpson Laboratory with rated 6AG7 tubes.