Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
RMS input per anode maximum
500 V
DC output current maximum
250 mA
Peak inverse voltage
1600 V
Rectifier - Full Wave ·Rectifier-Rectifier
FW4500
Directly heated full-wave power rectifier for substantial DC supplies. Its four-volt filament and high inverse-voltage capability support receiver, amplifier, and general high-voltage electronic power systems.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- British4Pin
- Socket code
- B4
- Base pins
- 4
- Nominal heater
- 4 V / 4 A
Description
Directly heated full-wave power rectifier for outputs up to 500 V at 250 mA.
Socket description
European 4-pin base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- British4Pin
- Socket code
- B4
- Base pins
- 4
- Nominal heater voltage
- 4 V
- Nominal heater current
- 4 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
British4Pin - 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
Rectifier
X-ray radiationInterelectrode capacitances
- Max cathode current
- 250 mA
- Rectifier peak inverse voltage
- 1800 V
- Rectifier nominal output current
- 250 mA
Full-wave directly heated rectifier; PIV and maximum output current promoted.
Section 2
Rectifier
X-ray radiationInterelectrode capacitances
- Max cathode current
- 250 mA
- Rectifier peak inverse voltage
- 1800 V
- Rectifier nominal output current
- 250 mA
Physical rectifier section 2; identical section values duplicated per physical-section policy.
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.
Data set 02
1958 Mullard Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
RMS anode voltage
500 V
PerAnode;2x500V
Reservoir capacitance
16 uF
2x500V
Minimum series resistance per anode
200 Ohm
2x500V
Reservoir capacitance
32 uF
2x350V
Data set 03
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Characteristic
HeaterOrFilamentVoltage
4 V
HeaterOrFilamentCurrent
4 A
Other
RMSInputVoltagePerAnodeMaximum
500 V
DCOutputCurrentMaximum
250 mA
PeakInverseVoltageMaximum
1800 V
Reservoir Capacitance
16 uF
RMSInput=500V
SeriesResistanceMinimum
200 ohm
RMSInput=500V