QQC0415

Directly heated double tetrode designed for HF amplifier, oscillator, frequency-multiplier, and modulator service. Two power sections provide compact paired transmitting operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B8G
Base pins: 8
Nominal heater: 6 V / 680 mA

Description

Directly heated double tetrode for HF amplifier, oscillator, multiplier and modulator service.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B8G
Base pins: 8
Nominal heater voltage: 6 V
Nominal heater current: 680 mA
Parallel heater voltage: 3 V
Parallel heater current: 1.36 A
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

2 physical sections, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Amplification factor: 7.5
Max plate voltage: 450 V
Max screen voltage: 250 V
Max screen dissipation: 7 W

Identical repeated sections compressed to one row. Directly heated double tetrode for HF amplifier, oscillator, multiplier and modulator service.

Section 2

Tetrode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this 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.

Data set 01

1963 Philips Electron Tubes Handbook V4

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

If
680 mA
| If = 0.68 A

Capacitance

Capacit
6 s
Capacitances | Capacit6s par systbme en push-pull
Plate capacitance
3.3 pF
Capacitances | Ca = 3.3 pF Co = 1.7 pF
Plate capacitance
1.7 pF
Capacitances | Ca = 3.3 pF Co = 1.7 pF
Control-grid capacitance
8.5 pF
Capacitances | Cg1 = 8.5 pF Ci = 5.7 pF
Control-grid capacitance
5.7 pF
Capacitances | Cg1 = 8.5 pF Ci = 5.7 pF
Grid-to-plate capacitance
0.05 pF
Capacitances | Cag1.= 0.05 pF

Other

Plate current
20 mA
Typical characteristics | S3 (Ia= 20 mA) = 2 mA/V
Plate current
2 mA/V
Typical characteristics | S3 (Ia= 20 mA) = 2 mA/V
Va Wo
2 V
Class C telegraphy | Va Wo 2 Va Mo 2 Va w
Horizontal with pins
1 a
Class C telegraphy | Horizontal with pins 1 and 5 in one
Plate voltage
600 V
Maximum ratings | Va = max. 600 V Va = max. 450V
Plate voltage
450 V
Maximum ratings | Va = max. 600 V Va = max. 450V
Wia = max
18 W
Maximum ratings | Wia = max.2x18 W Wia = max. 2x9 W
Wia = max
9 W
Maximum ratings | Wia = max.2x18 W Wia = max. 2x9 W
Wa = max
6 W
Maximum ratings | Wa = max. 2x6 W
Plate current
30 mA
Maximum ratings | Ia = max.2x30 mA
Screen-grid voltage
250 V
Maximum ratings | Vg2 = X. 250V
Wg
7 W
Maximum ratings | Wg2 = max. 7W
Control-grid voltage
200 V
Maximum ratings | _Vg 1 = max. 200 V
Control-grid current
5 mA
Maximum ratings | Ig1 = max. 2x5 mA
Y
60 MHz
Maximum ratings | Y = 60 60 60 Mc/s
Plate voltage
250 V
Maximum ratings | Va = 600 400 250 V
Screen-grid voltage
175 V
Maximum ratings | Vg2 = 200 200 175 V
Control-grid voltage
-70 V
Maximum ratings | Vg 1 = -80 -80 -70 V
Plate current
30 mA
Maximum ratings | Ia = 2x30 2x30 2x30 mA
Screen-grid current
6.5 mA
Maximum ratings | Ig2 = 6 6 6.5 mA
Igt
1.8 mA
Maximum ratings | Igt = 2x1.0 2x1.2 2x1.8 mA
Vgtgt'p
210 V
Maximum ratings | Vgtgt'p = 210 210 210 V
Wig
0.17 W
Maximum ratings | Wig1 = 2x0.1 2x0.11 2x0.17 W
Wg
1.1 W
Maximum ratings | Wg2 1.2 1.2 1.1 W
Wia
7.5 W
Maximum ratings | Wia = 2x18 2x12 2x7.5 W
Wa
2.2 W
Maximum ratings | Wa = 2x4.7 2x3.2 2x2.2 W
Wp
10.6 W
Maximum ratings | Wp = 26.6 17.6 10.6 W
I
186 MHz
Class C telegraphy | I = 186 186 186 Mc/s
Plate voltage
250 V
Class C telegraphy | Va = 600 400 250 V
Control-grid voltage
-70 V
Class C telegraphy | Vg1 = -80 -80 -70 V
Screen-grid voltage
175 V
Class C telegraphy | Vg2 = 200 200 175 V
Plate current
30 mA
Class C telegraphy | Ia = 2x30 2x30 2x30 mA
Control-grid current
1.5 mA
Class C telegraphy | I g1 = 2x1.0 2x1.0 2x1.5 mA
Published electrical value
4.5 mA
Class C telegraphy | 1 g2 = 3. 0 3.5 4.5 mA
Vg
220 V
Class C telegraphy | Vg1g1'p 210 210 220 V
Wig
0.15 W
Class C telegraphy | Wig1 = 2x0.1 2x0.1 2x0.15 W
Wia
7.5 W
Class C telegraphy | Wia = 2x18 2x12 2x7.5 W
Wa
2.4 W
Class C telegraphy | Wa = 2x5.2 2x3.6 2x2.4 W
Power output
10.2 W
Class C telegraphy | Wo = 25.6 16.8 10.2 W
Plate voltage
600 V
Maximum ratings | Va = max. 600 V Va = max. 450 V
Plate voltage
450 V
Maximum ratings | Va = max. 600 V Va = max. 450 V
Wia = max
24 W
Maximum ratings | Wia = max. 2x24 W Wia = max. 2x12 W
Wia = max
12 W
Maximum ratings | Wia = max. 2x24 W Wia = max. 2x12 W

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Filament : oxyde Vf = 3-3,15") 6
-6.3 V
Modulator
Heizfaden: Oxyd If = 1,36
680 mA
Modulator
ia = max.2x1
8 W
max.2x3
0 mA
Vg2 = max,
250 v
WgZ = max
7 W
Vg1 = max.,
200 v
f = 60 60
60 Mc/s
Ve = 600 400
250 V
Vg2 = 200 200
175 v
Vg1 = -80 -80
-70 V
Ia = 2x30 2x30 2x3
0 mA
Igo = 6 6
6.5 mA
Ig1 = 2x1,0 2x1,2 2x1,
8 mA
Wigt = 2x0,1 2x0, 11 2x0,
17 W
Wg2 = 1,2 1,2
1.1 W
Wiag = 2x18 2x12 2x7,
5 W
Wa = 2x4,7 2x3,2 2x2,
2 W
Wo = 26,6 17,6
10.6 W
Va = 600 400
250 V
ClassC;Telegraphy
Vg1 = =80 ~80
~70 V
ClassC;Telegraphy
Vg2 = 200 200
175 v
ClassC;Telegraphy
I, = 2x30 2x30 2%
30 mA
ClassC;Telegraphy
Ig1 = 2x1,0 2x1,0 2x1,
5 mA
ClassC;Telegraphy
Ig2 = 3,0 3,5
4.5 mA
ClassC;Telegraphy
Vgigl'p = 210 210
220 V
ClassC;Telegraphy
Wigi = 2x0,1 2x0,1 2x0,
15 W
ClassC;Telegraphy
Weo = 0,6 0,7
0.8 W
ClassC;Telegraphy
Wia = 2x18 2x12 2x7,
5 W
ClassC;Telegraphy
Wa = 2x5,2 2x3,6 2x2,
4 W
ClassC;Telegraphy
Wo = 25,6 16,8
10.2 W
ClassC;Telegraphy
Va = max, [1]
600 V
Va = max, [2]
450 V
Wig = max. 2x2 [1]
4 W
Wig = max. 2x2 [2]
2 W
Ia = max. 2x4
0 mA
Vg2 = max
250 V
Vg1 = max,
200 V
£ = 60 60
60 Mc/s
ClassC;PushPull;Telegraphy
Va = 600 400
250 V
ClassC;PushPull;Telegraphy
Vg1 = ~80 -850
-70 V
ClassC;PushPull;Telegraphy
Ia = 2x40 2x40 2x4
0 mA
ClassC;PushPull;Telegraphy
Ig1 = 2x1,2 2x2,0 2x2,
5 mA
ClassC;PushPull;Telegraphy

Capacitance

Ca [1]
3.3 pF
PushPull
Ca [2]
177 pF
PushPull
Cg1 [1]
8.5 pF
PushPull
Cg1 [2]
5.7 pF
PushPull
Cagtl
0.05 pF
PushPull
Kenndeton 52/ (Ig [1]
20 mA
PushPull
Kenndeton 52/ (Ig [2]
2 mA
PushPull