Rectifier - Full Wave ·Rectifier-Rectifier
Mullard indirectly heated full-wave power rectifier for higher-voltage receiver and amplifier supplies. Its four-volt heater supports substantial conventional electronic DC output.
The Mullard IW4-500 is an indirectly heated full-wave power rectifier for supplies of roughly 500 V at 120–125 mA.
European 4-pin base
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
2 physical sections, each with unique specifications.
Section 1
Representative of two identical rectifier sections.
Section 2
Second physical Rectifier section added for documented full-wave construction.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
RMS Input per Anode
500 V
Rectified Output Current
120 mA
Reservoir Capacitance
16 uF
CapacitorInputFilter
Minimum Supply Impedance per Anode
150 ohm
Data set 02
Published operating points and test conditions from this source.
Heater Voltage
4 V
Heater Current
2.5 A
Maximum RMS Input Voltage per Anode
500 V
Maximum DC Output Current
120 mA
Maximum Reservoir Capacitance
16 uF
Minimum Limiting Resistance per Anode
150 ohm