EXPERIMENT “6—2
135
Plate
ami Filameut Voltage (or Current) .—Disconnect
the grid circuit and join the plate and grid. Apply the normal
voltage (say 45 f0r type 01A tubes) to the plate. Vary the
lament voltage in steps of
.
about one-half volt from zero to
normal (5).
If lament currents are used, vary in steps from zero
to normal (0.25 amp) Read lament voltage (or current) simultaneously With plate current and plot With the latter as ordinates.
Plate Current and Plate [7 oltage.—Disconnect the gridand plate
and complete the grid circuit. Adjust the grid to zero potential
and set the lament at normal voltage (or current). Vary'the
B battery voltage in steps of about three volts from zero to maxi—
mum
(say 135) recording its value simultaneously With plate
currents.
Piot, With the latter as ordinatesî
-
‘
Plate Current and Grid /7 altage.—With connections as in gure
'
6—22, adjust the plate voltage (45) and lament voltage(5) to
normal values.
Note plate currents as grid voltages are varied
from ——10 to +10 Volts,, The points should be taken more frequently wherever the curves bend_sharply. Repeat With various
plate voltages, say 22%, 90 and 135,
plot all data on one graph
With plate currents as ordinates. ‘.These are spoken of as the static
characteristic curves.
All Will be shifted slightly if the  battery
'is reversed or the lameht 'rheostat is connected in the other
lead. If the plate voltage is small
volts) and the grid voltage
(vary it from zero toi plus 190), seao‘nelary emission may be
observed.
heating the la’_
ment maybe
above. The plate current-grid voltage
_
curves Will«be
ag: smaller slope if resistances
(5,000 ÎtoÂ
ohms) 'iëà—re included in theplaœ‘ circuit beÎ
cause of
this ;is a phenomenbn«
belongmgt@theplatwrcultfatherthant0thetubeüsdf»
-
_
EXPERIMENT6—2
,
*‘
594: Theconnectwnsareshownmgureé—23W1thallvoltages ‘
135
Plate
ami Filameut Voltage (or Current) .—Disconnect
the grid circuit and join the plate and grid. Apply the normal
voltage (say 45 f0r type 01A tubes) to the plate. Vary the
lament voltage in steps of
.
about one-half volt from zero to
normal (5).
If lament currents are used, vary in steps from zero
to normal (0.25 amp) Read lament voltage (or current) simultaneously With plate current and plot With the latter as ordinates.
Plate Current and Plate [7 oltage.—Disconnect the gridand plate
and complete the grid circuit. Adjust the grid to zero potential
and set the lament at normal voltage (or current). Vary'the
B battery voltage in steps of about three volts from zero to maxi—
mum
(say 135) recording its value simultaneously With plate
currents.
Piot, With the latter as ordinatesî
-
‘
Plate Current and Grid /7 altage.—With connections as in gure
'
6—22, adjust the plate voltage (45) and lament voltage(5) to
normal values.
Note plate currents as grid voltages are varied
from ——10 to +10 Volts,, The points should be taken more frequently wherever the curves bend_sharply. Repeat With various
plate voltages, say 22%, 90 and 135,
plot all data on one graph
With plate currents as ordinates. ‘.These are spoken of as the static
characteristic curves.
All Will be shifted slightly if the  battery
'is reversed or the lameht 'rheostat is connected in the other
lead. If the plate voltage is small
volts) and the grid voltage
(vary it from zero toi plus 190), seao‘nelary emission may be
observed.
heating the la’_
ment maybe
above. The plate current-grid voltage
_
curves Will«be
ag: smaller slope if resistances
(5,000 ÎtoÂ
ohms) 'iëà—re included in theplaœ‘ circuit beÎ
cause of
this ;is a phenomenbn«
belongmgt@theplatwrcultfatherthant0thetubeüsdf»
-
_
EXPERIMENT6—2
,
*‘
594: Theconnectwnsareshownmgureé—23W1thallvoltages ‘