Data set 01
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Octode
Characteristic
Conversion transconductance
500 µS
FrequencyConverter
Plate resistance
1.5 MΩ
FrequencyConverter
Voltage Radio Detector Converter ·Octode
DK21
Battery octode frequency changer for portable superheterodyne receivers. Its multi-grid structure combines oscillator and mixer functions, providing useful conversion gain and high plate resistance from low-power battery supplies.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 1.4 V / 50 mA
Description
DK21 is a battery octode frequency changer. The supplied Philips datasheet was read for construction, heater/filament data, ratings, characteristics, operating conditions, capacitances, and deflection information where applicable.
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
- 50 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- 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
1 physical section, each with unique specifications.
Section 1
Octode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 135 V
- Max plate dissipation
- 0.3 W
- Max cathode current
- 5 A
Battery octode frequency changer
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.