Simpson 1000 - Page 49

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SPECIAL APPLICATIONS
then set the K toggle at 0. Advance the BIAS control
to obtain the proper plate current.
When you have a combination setting which will give
you enough plate current, list the settings for the K
toggle and the BIAS control under the proper headings
for tube information.
Remove the current meter leads from the toggle
switch. Press the red RELEASE button to restore the
VALUE button and the LINE TEST button to their up
positions. Return the toggle switch for the plate cir-
cuit to its #3 position. Put the tube tester back into
its case.
Press the VALUE button and the LINE TEST button
again. Reset the LINE ADJUSTMENT control if nec-
essary for a meter indication at ADJ. LINE.
Presse TUBE TEST button. Use the L toggle
switch and the RANGE control as coarse and fine
adjustments, respectively, to obtain a 100% indication
on the meter. The meter pointer deflection will in-
crease as the L toggle setting increases through 0, 1,
2, and 3, to 4. Do not use position 5 of the L toggle
for this application. Meter pointer deflection will also
increase as the RANGE control setting is increased
(turn clockwise).
Record all the control and switch settings and the
percent indications for the first tube. Then repeat the
test on all other available good tubes of the same
type. If necessary, revise the setting of the RANGE
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