151
AM/FM Stereo Tuner
Selected tube parameters are listed in Table 10.5.
Characteristics curves for the 6C4 are diagrammed in Figure 10.10.
10.6 6CA4
The 6CA4 is a 9-pin rectifier tube used in power supplies for a variety of products having
moderate dc requirements. The pin layout is shown in Figure 10.11.
Table 10.5
Key Parameters of the 6C4
General Characteristics
Heater (ac/dc)
6.3 V, 0.15 A
Heater-cathode voltage
Peak value
±200 V max.
Average value
100 V max.
Direct interelectrode capacitance (unshielded)
Grid to plate
1.6 pF
Grid cathode and heater
1.8 pF
Plate to cathode and heater
1.3 pF
Class A
1
Amplifier, Maximum Ratings (Design-Maximum Values)
Plate voltage
300 V
Plate dissipation
3.5 W
Characteristics
Plate supply voltage
100 V
250 V
Grid voltage
0 V
–8.5 V
Amplification factor
19.5
17
Plate resistance (approx.)
6250
Ω
7700
Ω
Transconductance
3100
μ
mhos
2200
μ
mhos
Plate current
11.8 mA
10.5 mA
Grid voltage (approx.) for plate current of 10
μ
A
–10 V
–25 V
Maximum Circuit Values
Grid circuit resistance for fixed bias operation
250 k
Ω
Grid circuit resistance for cathode-bias operation
1 m
Ω
Figure 10.10
Characteristics curves for the 6C4.
Summary of Contents for AM/FM Stereo Tuner 2012
Page 1: ...WhitakerAudio AM FM StereoTuner User and Assembly Manual...
Page 11: ...11 AM FM Stereo Tuner Figure 1 1 Schematic diagram of the AM tuner section...
Page 17: ...17 AM FM Stereo Tuner Figure 1 2 Schematic diagram of the FM tuner section...
Page 34: ...34 WhitakerAudio Figure 3 1 Component layout for the AM tuner PWB...
Page 36: ...36 WhitakerAudio Figure 3 3 Component layout for the FM tuner PWB...
Page 69: ...69 AM FM Stereo Tuner Set the FM tuner board aside it will be used later b...
Page 101: ...101 AM FM Stereo Tuner Figure 5 11 Chassis view of the AM FM Stereo Tuner...
Page 159: ...159 AM FM Stereo Tuner...
Page 160: ...WhitakerAudio AM FM StereoTuner...
