Data set 01
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Anode voltage
135 V
Screen-grid voltage
135 V
Output power
1.5 W
Capacitance
Anode-grid capacitance
<0.6 pF
Voltage Dual Pentode ·Pentode-Pentode
DLL21
Directly heated dual output pentode designed for Class-B push-pull or parallel Class-A audio power service in battery-operated equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 1.4 V / 100 mA
Description
Dual directly heated output pentode designed for Class B push-pull output service or parallel Class A operation.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 1.4 V
- Nominal heater current
- 100 mA
- Parallel heater voltage
- 1.4 V
- Parallel heater current
- 200 mA
- Series capable
- Yes
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 135 V
- Max screen voltage
- 135 V
- Max plate dissipation
- 0.5 W
- Max screen dissipation
- 0.4 W
- Max cathode current
- 25 mA
Published electrical data extracted from supplied datasheet.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 135 V
- Max screen voltage
- 135 V
- Max plate dissipation
- 0.5 W
- Max screen dissipation
- 0.4 W
- Max cathode current
- 25 mA
Second physical output-pentode section restored.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.