Data set 01
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 2
Triode
Other
Typical anode voltage
90 V
Maximum filament voltage
1.5 V
Voltage - Triode (with diode, heptode or hexode) ·Diode-Triode
DAC22
Directly heated diode-triode designed for low-frequency resistance-coupled amplification in battery-operated receiving equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 1.2 V / 25 mA
Description
DAC22 is a directly heated diode-triode for lf resistance-coupled amplification. The supplied datasheet was read across its ratings, characteristics, operating information, and capacitance/deflection data where legible.
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
- 1.2 V
- Nominal heater current
- 25 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
2 physical sections, each with unique specifications.
Section 1
Diode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Directly heated diode-triode for LF resistance-coupled amplification
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 110000 Ω
- Transconductance
- 0.0005 S
- Amplification factor
- 40
Philips Miniwatt DAC22 directly heated diode-triode, triode section for resistance-coupled low-frequency amplification. Published typical triode values at 120 V plate voltage: amplification factor 40, transconductance approximately 0.5 mA/V, internal resistance 0.11 MΩ. These are characteristic test-point values, not maximum ratings.
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.