Type 6AS7 (G/GA) Low MU High Power Triode

12E1 tube (electron valve/beam tetrode) Manufactured by Standard Telephones and Cables Ltd

General Information

The 6AS7 (G/GA) is a low mu, high transconductance, high current twin triode designed for use as efficient series regulators in DC power supplies, low distortion audio frequency power amps and high frequency audio circuits. The suffix G/GA relates to the style and glass body size only.

Characteristics and Typical Operation

Cathode	Oxide coated	unipotential

Heater Voltage	6.3	V
Heater current	2.5	A
Cathode heater warming time	30	seconds
Anode Voltage	135	V
Anode Current	125	Ma
Anode resistance	280	Ω
Cathode Bias resistor	250	Ω
Amplification factor	2.0
Transconductance	7000	µS

AF Power Amplifier

DC Anode voltage	250	V
Grid control Voltag	-150	V
DC Cathode current	130	mA
Anode resistance	280	Ω
Anode dissipation	13	W
Transconductance	5500	µS
Glass Temperature	250°	C

Inter-Electrode Capacitances (Pf)

Grid to Anode	7.5	pF
Grid to Grid	0.5	pF
Anode to Anode	1.9	pF
Input – per triode unit	6.5	pF
Output – per triode unit	2.2	pF
Heater to Cathode – per triode unit	7.0	pF