Data set 01
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Average screen-grid current
0.4 mA
Voltage Tetrode ·Tetrode
B255
Philips Miniwatt screened-grid pentode for straightforward high-frequency receiver amplification using a 20 V, 180 mA heater.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 2 V / 180 mA
Description
B255 is a Philips Miniwatt pentode intended for rf amplifier screened-grid tube. The supplied datasheet gives heater, operating, characteristic, and rating information applicable to this type.
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
- 2 V
- Nominal heater current
- 180 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
Tetrode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 330000 Ω
- Max plate voltage
- 200 V
- Max screen voltage
- 100 V
- Max plate dissipation
- 0.8 W
- Max screen dissipation
- 0.1 W
- Max cathode current
- 5 mA
RF amplifier screened-grid tube.
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.