Data set 01
1948 Brimar Radio Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Oscillator Anode Voltage Maximum
200 V
G2
Characteristics
Maximum Operating Frequency
20 MHz
Suitable circuits
Voltage Radio Detector Converter ·Heptode
6A8GT
GT-envelope pentagrid converter for superheterodyne radio receivers, combining oscillator and mixer functions in one tube. Its compact GT envelope provides the established 6A8 frequency-changing characteristics in a smaller physical format.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 8A
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 300 mA
Description
The BRIMAR 6A8GT is a self-oscillating heptode frequency changer for AC, AC/DC, and car-radio receivers, with operation stated up to 20 MHz in suitable circuits.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 8A
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
8A - 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
- Plate resistance
- 360000 Ω
- Transconductance
- 0.00055 S
- Max plate voltage
- 300 V
- Max screen voltage
- 100 V
- Max plate dissipation
- 1 W
- Max screen dissipation
- 0.3 W
- Max cathode current
- 14 mA
Published maximum ratings and representative operating characteristics reviewed.
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 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Plate Voltage
250 V
Plate Current
3.5 mA
Screen Voltage
100 V
Screen Current
2.7 mA
Oscillator Anode Supply Voltage
250 V
Data set 03
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Heptode
Other
Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
100 V
Published handbook rating
Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA
Control-grid bias
3 V
ClassA
Plate current
3.5 mA
ClassA
Screen current
2.7 mA
ClassA
Characteristic
Plate resistance
360000 ohm
Published handbook characteristic
Transconductance
550 µS
Published handbook characteristic
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
300 mA
Published heater/filament rating