Data set 01
198X Shuguang
Published operating points and test conditions from this source.
SECTION 1
Heptode
Characteristics
Heater voltage
6.3 V
Nominal
Heater current
300 mA
Nominal
Plate voltage
250 V
Published principal electrical parameter
Voltage Radio Detector Converter ·Heptode
6A7P
Chinese heptode frequency changer for superheterodyne receiving service. Its multi-grid construction combines local oscillation and mixing, converting incoming radio signals to intermediate frequency from conventional receiver supplies.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6.3 V / 300 mA
Description
Indirectly heated oxide-cathode heptode frequency-converter tube.
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
- 6.3 V
- Nominal heater current
- 300 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
Heptode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 330 V
- Max screen voltage
- 110 V
- Max plate dissipation
- 1.1 W
- Max screen dissipation
- 1.1 W
- Max cathode current
- 15.5 mA
Shuguang Chinese 6A7P indirectly heated oxide-cathode heptode frequency changer. Manufacturer explicit maximum anode 330 V (existing 250 V was typical operating voltage), grids 2+4 110 V, plate dissipation 1.1 W, grids 2+4 combined dissipation 1.1 W, cathode current 15.5 mA. Typical anode 250 V, grids 2+4 100 V; conversion transconductance ~0.45 mA/V and oscillator transconductance ~4.7 mA/V are separately published and not equal to intrinsic static gm. Manufacturer input/output and coupling capacitances documented. Printed heater current appears inconsistent with present 0.3 A field; parent heater current held pending corroboration, rather than overwritten by uncertain OCR. One physical Heptode section.
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.