Data set 01
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Output power at 90 V
0.16 W
ClassA
Output power at 120 V
0.27 W
ClassA
Power - Pentode Single (NOT beam) (under 10W) ·Pentode
DL21
Philips battery output pentode with documented construction, filament data, ratings, characteristics, and operating conditions. Designed for low-frequency power amplification in portable battery equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 1.4 V / 50 mA
Description
DL21 is a battery output pentode. The supplied Philips datasheet was read for construction, heater/filament data, ratings, characteristics, operating conditions, capacitances, and deflection information where applicable.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 1.4 V
- Nominal heater current
- 50 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 300000 Ω
- Transconductance
- 0.0014 S
- Max plate voltage
- 135 V
- Max screen voltage
- 135 V
- Max plate dissipation
- 0.7 W
- Max screen dissipation
- 0.2 W
- Max cathode current
- 7 mA
Battery output pentode
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.