Voltage - Triode (with diode, heptode or hexode) ·Hexode-Triode
Radio receiver frequency changer designed for superheterodyne mixer and oscillator service. Its multi-grid construction performs signal conversion, often integrating local oscillation and mixing within one valve.
Triode-hexode all-wave frequency changer.
International Octal
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
No fixed ratings are recorded for this section.
Marconi X65 triode oscillator of indirectly heated all-wave/short-wave triode-hexode frequency changer. Manufacturer supplies 250 V anode circuit supply through approximately 30 kΩ and other typical operating conditions, not a clearly declared unrestricted triode maximum anode voltage; prior 250 V maximum field cleared. Octal/IO base and 6.3 V heater.
Section 2
No fixed ratings are recorded for this section.
Marconi X65 frequency-converter hexode suited to all-wave receivers with good short-wave performance and low frequency pulling. Manufacturer's 250 V anode supply and 100 V screen are typical circuit operating points, not explicitly defined absolute maxima, and maximum voltage fields remain unknown. Published conversion impedance approximately 2.5 MΩ and total cathode current near 11 mA are application-specific characteristics.
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.
Oscillator section function
Local oscillator
Oscillator anode voltage
250 V
Mixer section identity
Hexode
Mixer anode voltage
250 V
Mixer screen voltage
100 V
Frequency-changer service
Explicit