Dynascan B&K 667 Manuel d'instruction - Page 4

Parcourez en ligne ou téléchargez le pdf Manuel d'instruction pour {nom_de_la_catégorie} Dynascan B&K 667. Dynascan B&K 667 12 pages. Solid state tube tester

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SUMMARY
OF
HOW
TO
USE
THE
667
SOLID
STATE
TUBE
TESTER
10.
1].
12
Look up tube in chart.
Rotate HEATER
voltage switch "A" to indicated setting.
Insert tube in indicated socket.
Depress RESET pushbutton "B".
Depress LOCKOUT
switches "C" as indicated.
Set LOAD switch "D" to position indicated.
Actuate (depress) POWER
switch "E".
To
test
for
all
shorts:
Rotate
SELECTOR
switch
"F",
pausing
in
each of its twelve
positions,
and
observe
SHORTS
Lamp
"G".
A
steady glowing
of the SHORTS
Lamp
on
any
position
of switch
is
cause for rejection of the tube.
(Momentary flashes between positions
are to be ignored).
;
A light tapping of the tube with the finger tip while rotating for shorts
will help to locate intermittent shorts. Never tap with a screwdriver or
other hard object, as this does not constitute a valid test and may cause
damage to the tube.
Certain types of video amplifier tubes with high
Gm
of 15,000 or more such as 12HG7, 6GN7, and others, should not
be tapped at all.
Tapping of these Frame Grid tubes may cause a grid
short.
Set SELECTOR
switch to position indicated.
Depress
LEAKAGE
button
"H".
A
deflection
of
the
meter
pointer
into the GRID
EMISSION—REJECT
area of the top scale "J" is cause
for rejection
of the tube.
Depress
QUALITY
button
"K''.
Observe
test
results
on
the
GOOD-
BAD
scale of the meter
"L''.
This completes the test. Turn tester power off by releasing the POWER
pushbutton.
CAUTION
Always set the heater switch
to the correct filament voltage
position
before inserting the tube in the socket.
Failure to observe this precaution
may result in burning out the filament of the tube.
4