CV18 / 2C34 / VT224 / RK34
double triode
 |
This valve measures approx
130x46mm overall and has a 7 pin base. |
Commercial prototypes are DET19,
4074A and RK34. See also VT61, VT61A.
The CV specification states a ceramic base but the Raytheon RK34 does
not have this. This valve was used in the output stage of the Spitfire radio.
| Heater voltage |
6.3V |
| Heater current |
800mA |
| Max anode voltage |
300V |
| Max anode dissipation,per
anode |
5.0W |
| Mutual conductance * |
2.8mA/V |
| Anode impedance * |
5000 ohms |
| Amplification factor * |
14 |
| Max operating frequency |
175MHz |
| Capacitances
(apply to each half) |
| Ca-c+h |
0.6pF |
| Cg-c+h |
4.1pF |
| Cag |
2.45pF |
| Ca1-a2 |
1.1pF |
*: At Va=250, Vg=-7
| Pin |
Function |
| 1 |
Heater |
| 2 |
n/c |
| 3 |
Grid 1 |
| 4 |
Cathode |
| 5 |
Grid 2 |
| 6 |
n/c |
| 7 |
Heater |
| TC1 |
Anode 1 |
| TC2 |
Anode 2 |
|
|
