Power - Triode ·Triode
Long-life high-power triode with three grid-cathode structures specifically designed as a series-regulator/pass tube in regulated power supplies.
THE 7241 IS A LONG LIFE, HIGH POWER TRIODE DEVELOPED ESPECIALLY FOR USE
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Representative row for repeated electrically identical physical sections.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
MinimumCathodeHeatingTime
30 s
CurrentPerCathodeMaximum
400 mA
AltitudeForFullRatings
10000 ft
ExtendedAltitudeWithCooling
60000 ft
ShockRating
450 g
VibrationRating
2.5 g
Service
Series regulator / passing tube
Data set 02
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Nominal
Heater current
7.5 A
Nominal
Maximum plate voltage
400 V
Promoted published value
Maximum cathode current
400 mA
Promoted published value
HEATER VOLTAGE 6.3f10$ voLTs
10 V
HEATER CURRENT (Ef 6.3 V.) ],
5 A
T OT AI PLATE CURRENT DC --- 1.Z AMP.
1 A
RATINGS
IF TUBE VOLTAGE DROP IS TO BE SWUNG MORE THAN
6 V
RATINGS
HEATER- CATHODE VOLTAGE (DC) —3OO
300 V
CURRENT CANNOT BE REALIZED. SEE PLATE CHARACTERISTICS CURVE
HEATER VOLTAGE jF.] ().
9 V
CURRENT CANNOT BE REALIZED. SEE PLATE CHARACTERISTICS CURVE
ALTITUDE FOR FULL RATINGS lO,
0 ft
ALTITUDE FOR FULL RATINGS lO,000 FEET
R ATINGS~ ALTITUDE RATING CAN BE EXTENDED TO
60000 ft
ALTITUDE FOR FULL RATINGS lO,000 FEET
BE
27 ohm
ALTITUDE FOR FULL RATINGS lO,000 FEET
PLATE CURRENT (MIN.) 45O MA
45 mA
ALTITUDE FOR FULL RATINGS lO,000 FEET
HK LEAKAGE (MAX.) _ 15O µA
15 mA
ALTITUDE FOR FULL RATINGS lO,000 FEET
GRID CURRENT (MAX.)
12 mA
ALTITUDE FOR FULL RATINGS lO,000 FEET
TOTAL PLATE CURRENT u95 6OC MA~DC
6 mA
ALTITUDE FOR FULL RATINGS lO,000 FEET
AMPLIFICATION FACTOR 2.O 3.4
3.4 A
ALTITUDE FOR FULL RATINGS lO,000 FEET
HEATER CURRENT PER TUBE x.12 7.HH AMP.
7 A
ALTITUDE FOR FULL RATINGS lO,000 FEET
GRID RESISTANCE THAT MEETS BOTH THESE CONDITIONS IS
1000 ohm
CHARACTERISTICS CURVE. IF THE OUTPUT CURRENT OF THE SUPPLY IS NOT FIXED
Transconductance
33000 uS
Promoted published value
Amplification factor
2.7
Promoted published value
PASS MORE THAN ONE AMPERE AT
100 W
MINIMUM CATHODE HEATING TIME 3O SECONDS
3 s
AMPLIFICATION FACTOR 2.7
2.7 A
CURRENT PER CATHODE (DC) --- 4OO MA.
4 mA
CURRENT CANNOT BE REALIZED. SEE PLATE CHARACTERISTICS CURVE
GRID VOLTAGE (DC) —3OO O VOLTS
3 V
CURRENT CANNOT BE REALIZED. SEE PLATE CHARACTERISTICS CURVE
ENVELOPE TEMPERATURE
300 C
CURRENT CANNOT BE REALIZED. SEE PLATE CHARACTERISTICS CURVE
ADDITIONAL VOLTAGE (LESS THAN
10 V
CHARACTERISTICS CURVE. IF THE OUTPUT CURRENT OF THE SUPPLY IS NOT FIXED
VOLTAGE SHOULD BE KEPT AS CLOSE AS POSSIBLE TO
6.3 V
CHARACTERISTICS CURVE. IF THE OUTPUT CURRENT OF THE SUPPLY IS NOT FIXED