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Vacuum Tube Data Sheets 6CA7 / EL34
| MAXIMUM RATINGS (Design Center Values) |
| Plate voltage |
800 volts |
| Plate voltage without plate current |
2000 volts |
| Plate dissipation |
27.5 watts |
| Plate dissipation without input signal |
25 watts |
| Grid No. 2 voltage |
425 volts |
| Grid No. 2 voltage without place current |
800 volts |
| Grid No. 2 dissipation |
8 watts |
| Cathode current |
150 ma |
Grid current starting point. Grid No. 1 voltage when
grid No. 1 current is 0.3 u amp |
1.3 volts |
| Grid No. 1 circuit resistance (class A and AB) |
0.7 megohm |
| Grid No. 1 circuit resistance (class B) |
0.5 megohm |
| External resistance between heater and cathode |
20,000 ohms |
| Voltage between heater and cathode |
100 volts |
Operating Characteristics Class A, one tube |
| Supply voltage |
265 |
265 volts |
| Plate voltage |
250 |
250 volts |
| Grid No. 2 series resistor |
2000 |
0 ohms |
| Grid No. 3 voltage |
0 |
0 volt |
| Grid No.1 bias |
-14.5 |
-13.5 volts |
| Plate current |
70 |
100 ma |
| Grid No. 2 current |
10 |
15 ma |
| Transconductance |
9,000 |
11,000 micromhos |
Amplification factor of grid No. 2 with respect
to grid No. 1 |
11 |
11 |
| Plate resistance |
18,000 |
15,000 ohms |
| Plate load resistance |
3,000 |
2,000 ohms |
| Input voltage |
9.3 |
8.7 volts (rms) |
| Max. signal power output |
8 |
11 watts |
| Total harmonic distortion |
10 |
10 percent |
| Input voltage for power output of 50 m watts |
0.65 |
0.5 volt (rms) |
| Operating Characteristics Class B, two tubes |
| Supply voltage 425 volts |
| Common grid No. 2 resistor (without decoupling) |
1000 |
ohms |
| Grid No. 1 bias |
-38 |
volts |
| Grid No. 3 voltage |
0 |
volts |
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| Input voltage |
0 |
27 |
27 volts (rms) |
| Load resistance, plate to plate |
___ |
3400 |
4000 ohms |
| Supply voltage |
425 |
425 |
400 volts |
| Plate voltage |
420 |
400 |
375 volts |
| Plate current |
2 x 30 |
2 x 120 |
2 x 100 ma |
| Grid No. 2 current |
2 x 4.4 |
2 x 25 |
2 x 25 ma |
| Max. signal, power output |
0 |
55 |
45 watts |
| Total harmonic distortion |
___ |
5 |
6 percent |
Vacuum Tube Data Sheets
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