Data set 01
1971 RCA HB3 Binder 5 of 7
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristics
Heater voltage nominal
12.6 V
Heater current
600 mA
Heater warm-up time
11 s
Average
Power - TV Horizontal Output (sweep) ·BeamPower
12AU5GA
Beam-power tube for television horizontal-output service in 600 mA series-heater equipment, using a controlled-warm-up 12.6 V heater for reliable line-deflection operation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 6CK
- Socket code
- IO
- Base pins
- 6
- Nominal heater
- 12.6 V / 600 mA
Description
12AU5GA is explicitly specified as the 12.6-volt controlled-warm-up heater version of 6AU5GA; the supplied sheet provides heater data and refers all other ratings to the parent type.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 6CK
- Socket code
- IO
- Base pins
- 6
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
6CK - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Pin 1 | A | G1 — Control Grid | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
| PIN2Pin 2 | — | H — Heater | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
| PIN3Pin 3 | A | BP — Beam-Forming PlateGroup CK3 | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
| PIN3Pin 3 | A | K — CathodeGroup CK3 | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
| PIN5Pin 5 | A | P — Plate (Anode) | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
| PIN7Pin 7 | — | H — Heater | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
| PIN8Pin 8 | A | G2 — Screen Grid | Verified 6AV5GA manufacturer basing diagram, 6CK bottom view; Tung-Sol/RCA |
Section ratings
1 physical section, each with unique specifications.
Section 1
Beam Power
X-ray radiationInterelectrode capacitances
- Plate resistance
- 14500 Ω
- Transconductance
- 0.0059 S
- Amplification factor
- 4.3
- Max plate voltage
- 550 V
- Max screen voltage
- 175 V
- Max plate dissipation
- 11 W
- Max screen dissipation
- 2.5 W
- Max cathode current
- 400 mA
Reference-only sheet; electrical characteristics refer to 6AU5GA. Heater data from supplied 12AU5GA sheet; no unsupported parent ratings guessed.
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
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Capacitance
Grid-to-plate capacitance
0.5 pF
Grid to plate capacitance; RCA 12AV5GA equivalence, RC26/RC30
Input capacitance
14 pF
Input capacitance; RCA 12AV5GA equivalence, RC26/RC30
Output capacitance
7 pF
Output capacitance; RCA 12AV5GA equivalence, RC26/RC30
Other
Peak positive pulse plate voltage
5500 V
Peak positive pulse plate voltage; RCA 12AV5GA equivalence, RC26/RC30
Peak negative pulse plate voltage
-1250 V
Peak negative pulse plate voltage; RCA 12AV5GA equivalence, RC26/RC30
Average cathode current
110 mA
Maximum average cathode current; RCA 12AV5GA equivalence, RC26/RC30
Peak negative grid #1 voltage
-300 V
Peak negative control grid voltage; RCA 12AV5GA equivalence, RC26/RC30
For grid bias feedback HV regulation
0.47 MOhm
Maximum grid 1 circuit resistance; RCA 12AV5GA equivalence, RC26/RC30
Bulb Temperature (At hottest point)
210 degC
Maximum bulb temperature; RCA 12AV5GA equivalence, RC26/RC30
Plate voltage
250 V
Typical plate voltage; RCA 12AV5GA equivalence, RC26/RC30
Grid #2 voltage
150 V
Typical screen voltage; RCA 12AV5GA equivalence, RC26/RC30
Grid #1 voltage
-22.5 V
Typical control grid voltage; RCA 12AV5GA equivalence, RC26/RC30
Plate current
57 mA
Typical plate current; RCA 12AV5GA equivalence, RC26/RC30
Grid #2 current
2.1 mA
Typical screen current; RCA 12AV5GA equivalence, RC26/RC30
Grid #1 voltage
-43 V
Grid cutoff for Ib=1mA; RCA 12AV5GA equivalence, RC26/RC30
Plate voltage
60 V
Instantaneous knee plate voltage; RCA 12AV5GA equivalence, RC26/RC30
Plate current
260 mA
Instantaneous knee plate current; RCA 12AV5GA equivalence, RC26/RC30
Grid #2 current
26 mA
Instantaneous knee screen current; RCA 12AV5GA equivalence, RC26/RC30
Peak Heater-Cathode Voltage
200 V
Heater-cathode peak voltage, both polarities; RCA 12AV5GA equivalence, RC26/RC30
Peak Heater-Cathode Voltage
100 V
Heater-cathode average maximum; RCA 12AV5GA equivalence, RC26/RC30