Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
12AT6AETC
Controlled-warm-up 150 mA series-string diode-triode variant in the 12AT6A receiving family, intended for detector and voltage-amplifier service.
- Sections
- 3
- Base
- -
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 12.6 V / 150 mA
Description
Sylvania advance-data sheet listing controlled-heater-warm-up versions of several 150 mA series-string receiving tubes, including 12AT6A, 12AU6A, 12AV6A, 12BA6GA, 12BE6A, and related types.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- Yes
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
3 physical sections, each with unique specifications.
Section 1
Triode
- Plate resistance
- 54000 Ω
- Transconductance
- 0.0013 S
- Amplification factor
- 70
- Max plate voltage
- 300 V
- Max plate dissipation
- 0.5 W
Sylvania 12AT6A controlled-warm-up 150 mA series heater equivalent to 12AT6 apart from heater warmup, approximately 17 s by manufacturer's defined test. One triode and two physical detector diodes share a common cathode. Triode max anode 300 V and plate dissipation 0.5 W. Typical at Va 100 V and Vg -1 V: gm 1.3 mA/V, amplification factor 70, plate resistance 54 kΩ. The 12AT6 reference is the basis for section ratings.
Section 2
Diode
- Max cathode current
- 1 mA
First physical detector diode of Sylvania 12AT6A controlled-warm-up double-diode triode, sharing cathode with the triode and second diode. Per-diode maximum current 1 mA from 12AT6 electrically equivalent reference. The 2 mA measurement at 10 V applied is a test characteristic rather than rated maximum. 12.6 V 150 mA series heater, approximately 17-second warmup.
Section 3
Diode
- Max cathode current
- 1 mA
Second physical detector diode of 12AT6A, corrected from Rectifier section classification to Diode. Sylvania identifies 12AT6A as electrically equivalent to double-diode triode 12AT6 except controlled 17-second heater warmup. Per diode max 1 mA current; 2 mA at 10 V is a characteristic test. Cathode is common to both diodes and triode; 12.6 V, 150 mA series-heater service.
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.